Tellabs 6047 User manual

'irtellabs
technical manuai
76-826047A
rev B
practice section
816047/826047 A
©Tellabs, Inc., 2
October 1983
all rights ,~ ~ -- .. _~ '1rinted in USA
6047 and 6047 A4Wire-to-4Wire SF-to-E&M
Network Terminating Modules
page 1
page 3
page 9
page
14
page 22
page 18
page 19
contents
section 1general
description
section 2 application
section 3installation
section 4
circuit description
section 5
block diagram
section 6 specifications
section 7testing and troubleshooting
1.01 general description
1.01 The 6047 4Wire-to--4Wire SF-to-E&M Net-
work Terminating Module with Gain and the 6047 A
4Wire-to--4Wire SF-to-E&M Network Terminating
Module with Gain and Loopback (figure 1) each
provide signaling and transmission interface be-
tween a
4wire facility that uses single-frequency
(SF) signaling and a
4wire trunk (typically, aPBX
trunk)
or a 4wire line that uses E&M signaling. Both
modules provide active level control in
the transmit
and receive paths, receive-path amplitude equal-
ization, and full-duplex conversion between
the SF
signaling on
the facility and the E&M signaling on
the trunk or line. Conventional 2600Hz SF tone is
supplied
by an integral oscillator. The 6047 and
6047 Adiffer from ordinary 4wire E&M SF signaling
sets in
that they contain integral amplifiers to
accommodate avariety of facility interface levels.
Unlike
the 6047, the 6047 Acontains integral loop-
back circuitry that facilitates local or remote testing
of both
the module and the facility. As members of
Tellabs'
262U Universal Network Terminating Sys-
tem of modules and enclosures,
the 6047 and
6047A each fulfill Registered Facility Interface
Codes
TC31 E, TC31 M, TC32 E, TC32 M, TL31 E,
TL31 M, TL32E, and TL32M for network-terminating
applications
where the serving telephone company
uses SF signaling.
1.02
In the event that this practice section is re-
issued,
the reason for reissue will be stated in this
paragraph.
1.03 Features and options of
the 6047 and
6047 Ainclude the following: full prescription align-
ment capability; balanced, switchable 1200, 600,
or
150-ohm terminating impedances on the facility
side; fixed, balanced 600-ohm terminating imped-
ances on
the terminal side; facility-side amplifiers
and terminal-side attenuators for interface with a
variety
of levels; active slope-type receive equaliza-
tion; switch-selectable A-side
or B-side E&M signal-
ing; switch-selectable Type
I, II, or III E&M interface;
minimum-break transmit and receive pulse correc-
tion; and an integral sealing-current source. The
6047 Aalone contains the aforementioned loop-
back
circuitry with both local (manual) and remote
(two-tone) loopback-state control. Except for this
difference,
the two modules are identical.
page 1
figure
1. 6047 and 6047A 4 Wire-to-4 Wire
SF-to-E&M Network Terminating Modules
1.04 Prescription-set transmit and receive ampli-
fiers on
the facility side of the 6047 and 6047 A
allow each module
to interface the SF signaling
facility directly,
i.e., without aseparate facility-side
line amplifier. These integral amplifiers, in conjunc-
tion with prescription-set transmit and receive
attenuators on
the terminal side, provide for full
coordination between facility-side and terminal-
side levels. Both facility-side amplifiers on each
module provide from 0
to 24dB of gain in switch-
selectable
O.ldB increments, and both terminal-
side
attenuators provide from 0 to 24dB of loss in
switch-selectable
0.1 dB increments. In the receive
channel, input TLP's (transmission level points)
from
-17 to +7 can be accommodated and output
TLP's from +7 to -17 can be derived. In the
transmit channel, input TLP's from -16 to +8 can
be accommodated and output TLP's from
+8 to
-16 can be derived. The overload point at all four
ports of the 6047 and 6047 Ais +5dBmO.
1.05
An active slope equalizer for nonloaded
cable in
the receive channel of the 6047 and
6047 Apermits from 0 to 7.5dB of equalized gain to
be introduced at 2804Hz (re 1004Hz) in switch-
selectable 0.5dB increments. Because this equal-
izer
does not affect 1004Hz levels, equalization
can be introduced not only before but also
after
receive-channel levels are set, with no interference
between level and equalization adjustments.
1.06 Transformer coupling is provided at all
four
ports of the 6047 and 6047 AThe two facility-side
transformers on each module can be indepen-
dently switch-optioned for balanced 1200, 600, or
150-ohm terminating impedance, while the two

pair and is deactivated by application of asecond
2713Hz tone. With two-tone loopback,
the 6047 A
can be further optioned
for no timeout, i.e., for loop-
back deactivation
by application of asecond tone
only,
or for automatic loopback deactivation after a
2.6-minute
or 20.8-minute timeout interval if no
second tone is applied prior
to expiration of the
interval. Another loopback-related switch option
conditions
the 6047 A to busy out the associated
terminal
equipment (with A-side signaling and Type
IE&M interface only) during loopback
to prevent
the
trunk circuit or line circuit from being inadver-
tently seized. Aprescription loopback-Ievel-control
circuit introduces from 0
to 23dB of loss or gain
into
the loopback path in switch-selectable incre-
ments
(23dB loss; 0.5, 1.5,3, 6, and 12dB gain) to
provide true equal-level loopback.
practice section 816047/826047 A
terminal-side transformers each provide fixed, bal-
anced
600-ohm terminating impedance. All four
transformers on each module are center-tapped
to
derive balanced simplex leads. The 150-ohm facility-
side impedance options provide approximately
2dB
of slope equalization (in the receive channel, this is
in addition
to any provided by the active slope
equalizer) when
the facility-side ports interface
long sections of nonloaded cable.
1.07
An integral sealing-current source on each
module can be switch-optioned into
the circuit for
application of nominal
20mA sealing current to me-
tallic facility-side pairs Switching
the internal sealing-
current source out of the circuit provides access to
the facility-side simplex leads These leads can be
used,
for example, to apply sealing current to the
facility-side pairs from asource external to the
module. 1.14 Both the 6047 and 6047Acontain an integral
1.08 The transmit portion of
the 6047 and 6047 A 2600Hz SF signaling tone oscillator and therefore
converts de input signals to outgoing SF tone do not require an external (master) SF tone source.
signals. Aminimum-break transmit pulse
corrector Provision for use of master oscillator, however, is
ensures transmission of recognizable tone pulses. available via factory modification.
Atransmission-path-cut circuit with anominal 1.15
In addition to precision facility-gain and ter-
15ms pre-cut delay interval prevents transient minai-loss DIP switches
for both channels, the front
interference with outgoing signaling tones. panel of each module contains E-Iead and M-Iead
1.09 The receive portion of
the 6047 and 6047A busy-indicating LED's and seven bantam-type test
converts incoming SF tone signals to de output jacks. Opening jacks facing the module are pro-
signals. Aminimum-break receive pulse
corrector vided at all four ports, and monitoring jacks bridg-
ensures transmission of recognizable de pulses. ing
the transmission pair are provided at the two
Recognition delays prevent response to spurious input ports. The seventh jack is an E&M-Iead break-
SF tone bursts and to momentary tone interruptions. ing (opening) jack. The
front panel of the 6047 A
1.10 When
the 6047 or 6047A is optioned for A- also contains aloopback-active LED.
side (conventional terminal-side) E&M signaling, 1.16 Both modules
operate from filtered, ground-
the transmit portion of the module converts incom- referenced -22 to -56Vdc input. Maximum current
ing M-Iead states
to outgoing SF tones, and the requirements range from 86mA at idle to 95mA
receive portion converts incoming SF tones to when busy, with an additional 25mA required when
outgoing E-Iead states. When the module
is op- the internal sealing-current option is selected and,
tioned
for B-side (also referred to as "facility-side") for the 6047 Aonly, another 40mA required when
E&M signaling,
the transmit portion converts in- loopback is activated.
coming E-Iead states
to outgoing SF tones, and the 1.17 The 6047 and 6047A are Type 10 modules.
receive portion converts incoming SF tones
to As such, each module mounts in one position of a
outgoing M-Iead states. Tellabs Type
10 Mounting Shelf, versions of which
1.12 When the 6047 or 6047A is optioned for are available for relay-rack and apparatus-case
either A-side or B-side E&M signaling, it can also be installation. In relay-rack applications, up to 12
optioned
for Type I(single-lead) E&M interface, modules can be mounted across a19-inch rack,
which is often used with electromechanical switch- while up
to 14 modules can be mounted across a
ing systems,
or for Type II (looped-signaling-lead) 23-inch rack. In either case, 6inches of vertical
E&M interface, which is often used with electronic rack space is used.
switching systems. With A-side signaling only, the 1.18 Both
the 6047 and 6047A are members of
6047 and 6047A are compatible with aType III Tellabs' 262U Universal Network Terminating Sys-
(looped) E&M interface when optioned for Type
I. tern of modules and enclosures. Thus, each module
1.13 Unlike
the 6047, the 6047A contains in- can also be mounted in any of Tellabs' prewired
tegral loopback circuitry that loops 4wire receive 262U Mounting Assemblies, versions of which are
input signals back to the 4wire transmit output port available for relay-rack and apparatus-case instal-
for testing of signaling and transmission within the lation. For details, please refer to Tellabs' 262U
module and also on the facility. Switch options System brochure. In addition, the 6047 and 6047A
allow a choice of manual or two-tone loopback. can be used in the prewired mounting assemblies
Manualloopback is activated and deactivated via aof Tellabs' 262 Network Terminating System and
DIP switch on
the 6047's loopback subassembly. 260A SF Signaling and Terminating System. For
Two-tone loopback is activated
by application of details, please refer to the Tellabs brochures and
nominal
2713Hz tone to the 4wire receive input practices on the 262 and 260A Systems.
page 2

practice section 816047/826047 A
2.
application
2.01 The 6047 and 6047 A4Wire-to-4Wire SF-to-
E&M
Network Terminating Modules are each de-
signed
to interface a 4wire SF transmission facility
with a
4wire E&M trunk or line associated with a
two-way dial/supervisory
telephone circuil. These
modules
combine the functions of a 4wire line
amplifier, an SF transceiver, an SF-to-E&M signal-
ing converter, and a
4wire pad/transformer mod-
ule. Thus,
the 6047 and 6047 Aare complete 4wire
E&M SF signaling and terminating circuits, less
power and ringing, on single Type 10 modules. As
such, each module provides full-duplex signaling
conversion and transmission interface between
the
4wire SF facility and the 4wire E&M trunk or line.
The two modules differ only through the presence
of
loopback circuitry on the 6047 Athat allows test-
ing of both
the module and the facility from alocal
or remote location.
2.02 The
6047 and 6047 Aare well suited to a
variety of 4wire-to-4wire SF-to-E&M applications,
both network-terminating and otherwise.
In network-
terminating applications where
the serving tele-
phone company uses SF signaling, each module
fulfills Registered Facility Interface Codes
TC31 E,
TC31M, TC32E, TC32M, TL31E, TL31M, TL32E, and
TL32M. Figures 2through 4
show three typical
network-terminating tie-trunk applications of the
6047 and 6047A: short-haul, long-haul involving
analog carrier, and long-haul involving digital car-
rier, respectively.
terminal interface
2.03 The 6047 and 6047 Ainterfaces the local
(terminal-side)
4wire E&M trunk or line via prescrip-
tion
attenuators in the transmit and receive paths
(see paragraph 2.06) and via transformers at the
transmit input and receive output ports. Both
terminal-side transformers provide fixed, balanced
600-ohm terminating impedance and are center-
tapped
to derive balanced simplex leads. Transient
protection is provided at both terminal-side ports.
facility interface and sealing-current source
2.04 The 6047 and 6047A interface the 4wire
facility-side (SF) transmission facility via prescrip-
tion amplifiers
in the transmit and receive paths
(see paragraph 2.06) and via transformers at
the
transmit output and receive ports. Each of the two
facility-side transformers provides balanced, inde-
pendently switch-selectable 1200, 600,
or 150-ohm
terminating impedance. The 1200-ohm option is
used for interface with loaded cable;
the 600-ohm
option, for interface with nonloaded cable or car-
rier; and
the 150-ohm option, to provide approx-
imately
2dB of slope equalization (in the receive
channel,
this is in addition to any provided by the
module's active slope equalizer) for long sections
of nonloaded cable through
the deliberate imped-
ance mismatch. Both facility-side transformers are
center-tapped
to derive balanced simplex leads
(see paragraph 2.05).
2.05
An integral sealing-current source in the
6047 and 6047A can be switch-optioned into the
circuit to apply approximately 20mA of sealing
current to metallic facility-side transmit and receive
pairs. This
current flows outward from the 4wire
transmit output port (pins 41 and 47) and returns
via
the 4wire receive input port (pins 7and 13).
When the internal sealing-current source is
switched out of
the circuit, normal simplex leads
are derived on the facility side. These simplex leads
can be used to provide sealing
current to the
facility from asource external to the module if such
an arrangement is desired.
level control
2.06 Prescription-set transmit and receive ampli-
fiers on
the facility side of the 6047 and 6047A
allow each module to interface the SF signaling
facility directly,
i.e., without aseparate facility-side
line amplifier. The module's amplifiers, in conjunc-
tion with
the prescription-set transmit and receive
attenuators on
the module's terminal side, provide
for full coordination between facility-side and
terminal-side levels (see figure
5). In the receive
channel,
the facility-side amplifier is set to provide
the gain necessary to derive a +7 transmission
level point
(TLP) within the module. This internal
TLP is then used as areference as the module's
terminal-side receive
attenuator is set to provide
,TL32M
I INTERFACE
I
I
11 ~
I
!I
/II
IPBX
6047/47A
I
In/I
I
~
II
BlE
ISSION
I
lTV
M E
SBISGI
I
ISGI
SB
E M
i
I
SFCA
TllANSM
FACll
E M
6047/47A
ITL31M
,INTERFACE
figure 2. Typical short-haul tie-trunk circuit using 6047 or 6047A
page 3
M E
PBX

practice section 816047/826047 A
ANALOG
CARRIER
TMNS"'SSION
FACILITY
figure 3. Typical long-haul analog tie-trunk circuit using 6047 or 604 7A
1Tl.31 ..
I'NTERF"CE
I
DIGITAL
CMAIER
MUUIPLEX
EQUIPMENT
ITL32M
IINTERFACE
I
...
figure 4. Typicai/ong-haul digital tie-trunk circuit using 6047 or 604 7A
t(;V amplifier provides
gain to derive internal
+7TlP from 4wire
rev input level
rev attenuator provides
loss to derive required
4wire rev output level
from internal +7TLP
4wire
receive
input port
o to 24dB
in +7TLP o
to 24dB
loss
4wire
receive
output port
receive path
FACILITY
SIDE
TERMINAL
SIDE
4wire
transmit
output port
1
f-_.:-~1~6~T~L~P~_....,ro':::"¥dsl
1-----f--- .. ---,I a to 24dB 0 to 24dB 11-_--< .. __ +- ......
... gain loss
transmit path
xmt amplifier provides
gain to derive required
4wire xmt output level
from internal-16TLP
l<mt attenuator provides
10$s to derive internal
-16TLP from 2wire
input level
figure 5. Level coordination in 6047 and 6047 A
the loss necessary to derive the required terminal- 24dB of loss in 0.1 dB increments. Thus, receive
side receive
output ievel. In the transmit channel, input TLP's from -17 to +7 can be accommodated
the terminal-side attenuator is set to provide the and receive output TLP's from +7 to -17 can be
loss necessary to derive a -16TLP within the mod- derived. In asimilar manner, transmit input TLP's of
ule. This internal TLP is then used as a reference -16 to +8 can be accommodated and transmit out-
as the moduie's facility-side transmit amplifier is put TLP's of +8 to -16 can be derived. Total
set to provide the gain necessary to derive the faciiity-side gain and total terminal-side loss intro-
required facility-side
transmit output level. Both duced into achannel are the respective sums of
facility-side amplifiers in the
6047 and 6047A pro- that channel's front-panel fac gain and term loss
vide from 0 to 24dB of gain in O.ldB increments. switches set to the IN position. The overload point
Both terminal-side attenuators provide from 0to at all four ports of the 6047 and 6047 Ais +5dBmO.
page 4

practice section 816047/826047 A
1004 H,
7.5<18 MAXIMUM
figure 6. Typical response curves for receive-channel
active slope equalization
o',dEl
INCF~EIV'U\lS
o 5dH MINIMUM
2B04lil 3~H.
FHlQUE'IlCY
"
EOLl !6
.,
~dB
oc
~ ~
"
4.,
'C
3 "
;c
2'1
, 0
,;
'0
0;
"'
3 C t------I"'---- ~
~IV()T POINT
A-side (conventional terminal-side) signaling is
used when
the associated registered terminai
equipment provides a ground on the Elead for call
origination. 60side (sometimes referred to as "facility-
side") signaling is used when
the associated regis-
tered terminal equipment provides battery on
the
Mlead for call origination. Each of these E&M
signaling modes is described in detail below.
2.10
A-Side E&M Signaling. A-side E&M signal-
ing is used with Registered Facility Interface Codes
TC31M, TL31M, TC32M, and TL32M.
In typical A-
side SF-to-E&M signaling applications (with aType
Iinterface),
the 6047 or 6047A provides an E-Iead
output
that is open when SF tone is detected at the
receive input port and that is at circuit ground
when no tone is detected. In the transmit channel,
SF tone is transmitted when
the Mlead is either
300H,
receive-channel amplitude equalization
2.07 Aprescription active slope-type amplitude
equalizer in
the 6047 and 6047A provides post-
equalization
of the facility-side receive pair. From 0
to 7.5dB of gain at 2804Hz (re 1004Hz) can be
introduced into either module's receive path in
switch-seiectable 0.5dB increments to compensate
for
the frequency response of nonloaded cable.
Typical flatness achievabie with
the module's re-
ceive equaiizer is
±0.3dB from 400 to 3200Hz re
1004Hz. The module's equalized gain response is
not affected by flat gain and loss adjustments,
which are used
to provide precise transmission
alignment. Frequency response of
the equalizer is
shown graphically in figure 6and in tabular form in
table
1.
Note: Because introduction of equalization into the
receive channel of the 6047 or 6047 Adoes not
affect 1004Hz levels, equalization can be introduced
not only before but also after transmission levels
are set.
E&M signaling interfaces
2.08 The 6047 and 6047A can each be switch-
optioned to derive either aType I(single-lead) or a
Type
II or III (looped-signaling-lead) E&M interface.
The conventional Type Iinterface is often used in
electromechanical-switching-system
(e.g., SxS) en-
vironments, while
the newer Type II and III inter-
faces are often used
in electronic-switching-system
environments. The Type Iand Type
II interfaces can
be used with
either A-side or B-side E&M signaling
(see paragraphs 2.09 through 2.13). The Type III
interface can be used with A-side signaling only.
Figure 7shows
the connections required for Type
I, II, and III E&M signaling interfaces.
E&M signaling modes
2.09 Both the 6047 and 6047 Acan be switch-
optioned
for either A-side or B-side E&M signaling.
receive equalized gain (in dB) introduced at various frequencies
equalizer
switch
setting (dB)
300Hz 400Hz 500Hz 800Hz 1004Hz 1500Hz 1800Hz 2500Hz 2804Hz
0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
0.5
-0.23 -0.19 -0.15 -0.06
0.0 +0.15 +0.24 +0.43 +0.50
1.0 -0.52 -0.42 -0.33 -0.13
0.0 +0.32 +0.52 +0.93 +1.07
1.5
-0.75 -0.60 -0.49 -0.18
0.0 +0.46 +0.74 +1.33 +1.54
2.0
-1.00
-0.80 -0.64 -0.24
0.0 +0.61 +0.98 +1.76 +2.04
2.5
-1.22 -0.98 -0.78 -0.29
0.0 +0.75 +1.20 +2.15 +2.49
3.0 -1.50 -1.20 -0.95 -0.36
0.0 +0.90 +1.45 +2.60 +3.01
3.5 -1.71 -1.37 -1.09 -0.41
0.0 +1.03 +1.65 +2.97 +3.45
4.0
-2.02 -1.63 -1.29 -0.49
0.0 +1.22 +1.95 +3.54 +4.12
4.5 -2.25 -1.79 -1.42 -0.53
0.0 +1.33 +2.14 +3.90 +4.56
5.0
-2.49 -1.98 -1.57
-0.59
0.0 +1.47 +2.36 +4.32 +5.08
5.5 -2.68 -2.14 -1.69 -0.63
0.0 +1.58 +2.53 +4.67 +5.51
6.0 -2.89 -2.30 -1.81 -0.68
0.0 +1.69 +2.72 +5.05 +5.99
6.5 -3.07 -2.44 -1.93 -0.72
0.0 +1.79 +2.87 +5.38 +6.41
7.0 -3.29 -2.61 -2.05
-0.76
0.0 +1.89 +3.05 +5.76 +6.90
7.5 -3.45 -2.74
-2.15 -0.78
0.0 +1.98 +3.19 +6.06 +7.30
table 1. Typical receive-channel slope equalization
page 5

practice section 816047/826047 A
-----------------
-----------------
figure 7. E&M signaling interfaces
2.12 B·Side E&M Signaling. B-side E&M signal·
ing is used with Registered Facility Interface Codes
TC31 E, TL31 E, TC32E, and TL32E. In typical B-side
SF-to-E&M signaling applications (with aType I
interface), the
6047 or 6047A provides an M-Iead
output
that is at ground potential when SF tone is
detected at
the receive input port and that is at
negative battery potential when no tone is de-
tected.
In the transmit channel, SF tone is transmit-
ted when the Elead is open, and
tone transmission
ceases when
the Elead is at ground potential.
2.13 The M-Iead output from
the 6047 or 6047A
is derived via amercury-wetted relay with anor-
maliy open contact. This
contact can be externaliy
wired
to accommodate either Type I or Type II M-
lead interface (Type III
cannot be used with B-side
signaling). Regardless of
the contact wiring, how-
ever,
the relay is de-energized when the module
senses no SF tone at
the receive input port and is
energized when SF
tone is detected. The minimum-
break
receive pu Ise corrector is arranged to con-
trol
the pUlsing relay such that, foliowing tone
recognition,
the relay is energized for aminimum of
50ms. After this
50ms input break interval, the
relay de-energizes upon absence of tone. The
minimum-break
transmit pulse corrector ensures
that the minimum duration of any outgoing SF tone
pulse is 50ms.
incoming SF tone detection
2.14 The 6047 and 6047A are designed to inter-
face
the receive path on the facility side at any TLP
from
-17 to +7. Idie-state SF tone is received at a
level of
-20dBmO. Ahigher levei of -8dBmO is re-
ceived during
break portions of dial pulses and for
about 400 miliiseconds at the beginning of each
tone intervaL The SF
tone detector in each module
reliably detects tone levels as low as
-31dBmO,
provided that the SF tone energy is at least 10dB
above the level of ali other signals simultaneously
present at
the receive input. The SF tone detector
is actually asignal-to-guard ratio comparator that
compares
energy in a narrow band of frequencies
centered at the SF tone frequency with energy in
the entire voice band. This detection arrangement
aids significantly in prevention of talk-off, but it
places an upper bound on aliowable circuit noise.
In general, received noise in excess of 51dBrnCO
may interfere with detection of low-level signaling
tones.
2.15 Within approximately 13 miliiseconds of de-
tection of incoming SF tone, aband-elimination
filter (BEF) is inserted into
the receive transmission
path
to prevent propagation of SF tone beyond the
module. An internal timing circuit ensures that the
filter remains inserted during dial pulsing and dur-
ing momentary losses of
tone continuity. See
tables 2and 3for details concerning BEF insertion.
2.16 The minimum-break pulse
corrector in the
receive path is designed to ignore momentary
losses of SF tone of up to 50ms in duration. This
corrector also ensures that E-Iead breaks (in A-side
signaling)
or M-Iead breaks (in B-side signaling) have
page 6
t 48V
M
M
EI IE E
r-_ ..... _SG~c:;G )( I_
e; II
;! MW;A j M-lEAOL
+--"'-~I fI SENSOR ~
,,-
SB I ISBIMB)
L.- __ ~I>--<:( ......
I I
_ }runk_ circu~ -.J Ls.!!t!:!!.lir'~i~ _
figure 7c. Tvpe III E&M signaling interface
-48V
EBI IEB", SG
-!-r-.-~---E~:l:>-<~A", E fE
-4BV E >---<i
I I
MBi 1MB
Q>---<iEE--'II...V
..... -...... 48V
II
M MAi~M-lEAoL
, ~SENSOR~
__ !!'.!:!..n~ circ,!i~ Ls_i!l!!!!il!.g~i! _ -
(;gure lb. Type II E&M signaling interface
~
i iE E
-48V E1>--<:( )(
I' ~
I I
,,
~
MI ~M-LEAOL
-48V N t-<j"""l SENSOR ~
~I I
,,
__ trun~ circ~tJ L _s!i!!!.li~i~ _
figure 7a. Type I E&M signaling interface
open or at ground potential, and tone transmission
ceases when
the Mlead is at negative battery
potential.
2.11 The E-Iead output from the 6047 or 6047A
is derived via amercury-wetted relay with anor-
maliy open contact. This
contact can be externaliy
wired
to accommodate any desired E-Iead inter-
face (Type
I, II, or iii). Regardless of the contact wir-
ing, however, the relay is energized when
the
module detects no SF tone at the receive input
port and is de-energized when
the SF tone is
detected. The minimum-break
receive pulse cor-
rector is arranged
to control the pulsing relay such
that, foliowing tone recognition, the relay is de-
energized
for aminimum of 50ms. After this 50ms
Input break interval, the relay energizes upon
absence of tone. The minimum-break
transmit
pulse corrector ensures that the minimum duration
of any outgoing SF tone pulse is 50ms.

aminimum duration of 50ms. The module recog-
nizes signaling-state changes in
the receive direc-
tion regardless of
the local M-Iead state (in A-side
signaling)
or the local E-Iead state (in B-side
signaling).
outgoing SF tone transmission
2.17 The 6047 and 6047A are designed to inter-
face
the transmit path on the facility side at any
TLP from
+8 to -16 and to transmit SF tone at
either of two levels. During the idle state, the mod-
practice section
816047/826047 A
ules transmit SF tone at
-20dBmO. During dial
pulsing and also for
the first 400ms each time they
apply tone to the facility, the modules transmit SF
tone at a
higher level of -8dBmO. This momentarily
increased tone levei aids
in detection of supervisory-
state changes and incoming dial pulsing.
delay circuit and transmit pulse correction
2.18 Asymmetrical delay of approximately 20ms
is provided between the M-Iead input (A-side sig-
naling)
or the E-Iead input (B-side signaling) and
circuit condition
.SF tone states
local condition of xmt path cut
local rev-path
band-elimination-filter (BEF)
xm,
~,
before change
after insertion
idle
0'
0'
co<
none
,",
inserted
seizure on/off 00
ce'
stays cut 125±50ms after seizure not CUI inserted
transition
distant end returns off
on/off not cut none
not cut
removed 50±5ms after cessation of
delay-dial signal transition
SF tone
distant end sends off off/on
not cut
none
not cut
inserted i 3±7ms oller rec:eipt of
start-dial signal transition
SF tone
local-end dialing off Ion and on/off
00
not cut precu l 15±7rns; '-~mains cut as long as
not cut inserted
transitions,
M-Iead make/break transitions are less
ending with than 1 25±25ms apart; remains cut
on/off
1 2S±50ms aft~r last break/make
tranSition
transition'
distant end off
00
not cut none not cut inserted
answers (free call)
distant end off on/off not cut none
not cut removed SO±Sms alter cessation of
answers (toll calll transition SF tone
talking
off off
not cut
none
not cut out of circuit
disconnect, local
off Ion off
not cut precut 15±7ms; cut 625±1 25ms not cut out of circuit
end first
transition
after M-Ieod trJrlSition from battery
to ground *
disconnect, 00 off Ion not cut
cut within 35ms
,",
inserted 13±7ms "Iter receipt of
distant end
transition SF tone
idle 00 00
'"'
none
co< inserted
~E-Iead transition for B-side signaling
table 2. SF tone states and status of transmit path cut and receive BEF for local call origination
circuit condition SF tone states local condition of xmt path cut local rev-path
band-elimination-filter (BEF)
xm'
'"
before change after
insertion
idle oc 00
,",
none
w,
inserted
seizure, distant
00 on/off
,",
remains cut 625±125ms after ces- not cut
removed 50±5ms after cessation of
eod
transition
sation of SF tone SF tone
local end returns
onloff off
not cut cut
12S±50ms after M-Iead transi· not cut out of circuit
delay-dial signal transition tion from ground to batt~ry·
local end returns offlon off not cut precut 15 ~7ms: remains cut
not cut
out of c'lrcuit
start-dial signal transition 625±125rns alter M-Iead transi-
tion !rom battery to ground'
distant end transmits 00 off/on and not cut cut within 7ms of receipt of first
not cut inserted 13±7ms "her receipt of first
dial pulses onloff tran-
tone pulse; remains cut as long as tone PUISl'. rcrr,a,"s in circuit until
sit ions, end-
incoming break/make transitions
50±5ms after last incoming on/off
ing with on/
are less than 625±1 25ms after transition or 225±50ms, whichever
off transition
last incoming on/off transition is longer
local end oc
off
not cut
none not cut out of circuit
answers (free call)
local end on/off
off
not cut cut
125±50ms after M-Iead transi- not cut out of circuit
answers (toll call)
tranSition tion from ground to battery~
talking
off off not cut
none not cut out of circuit
disconnect, off
off Ion not cut none not cut
inserted 1 3=7ms "tter receipt of
distant end
tranSition
SF tone
disconnect, off/on
00 not cut
precut 15±7ms;
then continuously
,",
inserted
local end
transition
'"'
idle oc oc
,",
none
co<
inserted
*E-Iead transition for B-side signaling.
table 3. SF tone states and status of transmit path cut and receive BEF
for distant-location call origination
page 7

practice section 816047/826047 A
the tone transmission gate. This delay prevents
inadvertent transmission
or interruption of SF tone
in response
to momentary transitions of the sig-
naling-lead inputs. This delay is also instrumental in
prevention of transient interference with SF tone
transmission, as noted in paragraph 2.23.
2.19 Aminimum-break pulse
corrector in the
transmit path ensures a50-millisecond minimum-
break duration during dialing. This type of pulse
correction does not interfere with supervisory winks
and momentary signaling-state changes and helps
to ensure that recognizable pulses are transmitted.
The pulse
corrector does not alter the duration of
tone intervals resulting from M-Iead (in A-side
signaling)
or E-Iead (in B-side signaling) state
changes longer than
50 milliseconds.
transmit path cut
2.20 The transmit voice path through the 6047
and 6047 Ais cut (opened) during idle circuit con-
ditions and is restored when
the Mlead (A-side
signaling)
or the Eiead (B-signaiing) is in the busy
condition. The path is also
cut during dialing in
either direction and is momentarily cut in response
to any transition of the Mlead while the Elead is in
the off-hook state (A-side signaling) or in response
to any transition of the Elead while the Mlead is in
the off-hook state (B-side signaling). These path
cuts prevent transmission of noise, transients,
speech, and
other interfering signals during critical
signaling intervals.
2.21 The transmit path
cut is inserted within 5ms
of an M-Iead (A-side signaling) or E-iead (B-side sig-
naling) state change. Tone transmissions in re-
sponse
to M-Iead (A-side signaling) or E-Iead (B-side
signaling) state changes
are delayed for 18±5ms,
resulting in apre-cut interval of 8 to 22ms. This
ensures that any transients associated with
signaling-state changes in
the local trunk circuit or
line circuit do not affect SF tone transmission.
Details concerning insertion and removal of the
transmit path
cut are provided in tabies 2and 3.
SF tone source
2.22 The 6047 and 6047 Aeach contain an in-
tegral
2600Hz SF tone oscillator and therefore do
not require an external SF tone supply. This makes
these modules especially convenient
for use in
low-density applications. If operation from amaster
SF tone oscillator is desired, provision can be
made via factory modification for connection of
the
external SF tone source, rather than the internally
generated signal,
to the tone control circuitry. The
external signal shouid be 0.5±O.1Vrms,
2600±2Hz,
unbalanced. Input to the 6047 and 6047 Ais capac-
itively coupled and presents aload impedance of
greater than 100 kilohms to the tone source.
power
2.23 The 6047 and 6047 Aare designed to oper-
ate on filtered, ground-referenced input potentials
between
-22 and -56Vdc. The positive side of the
de power supply should be connected to earth
ground. Maximum
current required without the
internal-sealing-current and loopback options acti-
vated is
95mA When the sealing-current option is
activated on
either module, an additional 25mA is
required; when the
6047 Ais placed into loopback,
another 45mA is required.
loop back (6047 A only)
2.24 Integral facility-side loopback circuitry in
the 6047A allows signals at the 4wire receive input
port to be looped back to the 4wire transmit output
port for testing of both the module and the facility.
Figure 8shows
the loopback path through the
module. Prescription loopback-Ievel-control cir-
cuitry introduces from 0 to 23dB of gain or loss
into
the loop-back path in switch-selectable incre-
ments
(23dB loss; 0.5, 1.5,3,6, and 12dB gain) to
provide true equal-level loopback Aswitch option
busies
out the terminal equipment during loop-
back, if desired,
to prevent inadvertent seizure of
the trunk circuit or line circuit. This option can
only be used, however, with A-side signaling
and Type I E&M interface. In such applications,
the option busies out the terminal equipment by
grounding the Elead.
2.25
Manual Loopback Manual loopback, which
is convenient
for local testing, is controlled by DIP-
switch position 82-2 on
the 6047's ioopback sub-
assembly. Loopback is activated by
selling this
loopback ...- ,
rOllte
.... ----:"4W"""',-, -'''"''"'o-HII
TO FACILITY
co SIDE
(orPBXI
4wire xmt out
'"
,.1
II
4wire rev out
TO
TERMINAL
PBX
SIDE
(0'
station)
term
II
4wire xmt in
loss
figure 8. Loopback roufe fhrough 6047A
page 8

switch to the ON position and is deactivated by set-
ting
the switch to OFF. (Loopback cannot be deac-
tivated
by applying nominal 2713Hz tone to the
6047 A's receive input pair when the module is in
the manual loopback mode.)
2.26 Two-
Tone Loopback. Two-tone loopback,
which is convenient for remote testing, is activated
by applying nominal 2713Hz tone to the 6047A's
receive input pair (pins 7and 13). This tone must
fall within a
35Hz bandwidth centered at 2713Hz
and must be at alevel above -20dBm. The dura-
tion of
this activation tone must be at least 1.4
seconds, and loopback is activated
only upon
removal of the tone. With two-tone loopback, three
loopback-deactivation options are available. The
first is
no timeou~ i.e., deactivation by asecond
tone only. With this option, the module remains in
loopback until nominal 2713Hz tone is applied
again, this
time for at least 0.7 second, after which
loopback is deactivated regardless of
whether or
not the tone is removed. (The difference in the
required durations of the loopback-activation and
loopback-deactivation tones prevents the acciden-
tal
looping back of other modules that may be in
the circuit.) The second and third loopback-deacti-
vation
options are automatic deactivation after a
2.6-minute timeout or a 20.S-minute timeout if
nominal
2713Hz tone is not applied for at least 0.7
second
prior to the expiration of the selected
timeout interval. These timeout modes not only
allow a
choice of test-period duration but also pro-
vide
the additional benefit of preventing the 6047 A
from being left in
the loopback state after testing is
completed.
3.
installation
inspection
3.01 The 6047 and 6047 A4Wire-to-4Wire SF-to-
E&M
Network Terminating modules should be
visually inspected upon arrival to find possible
damage incurred
during shipment. If damage is
noted, aclaim should immediately be filed with the
carrier. If stored,
the modules should be visually
inspected again
prior to installation.
mounting
Caution: The 6047 and 6047A each use a
mercury-wetted relay for E-Iead (A-side signaling)
or M-Iead (B-side signaling) output. Before instal-
lation, each module should be held in an upright
position and tapped gently on a hard surface to
ensure that the mercury is properly positioned
within the relay. After it is tapped, the module
should be kept upright until installation and
installed in avertical, upright position.
3.02 The 6047 and 6047 Aeach mount in one
position of aTellabs Type 10 Mounting Shelf
or in
one position of aTellabs 262, 262U,
or 260A
Mounting Assembly. The modules plug physically
and electrically
into 56-pin connectors at the rear
of their shelf or assembly positions.
page 9
practice section 816047/826047 A
installer connections
3.03 In applications where the 6047 or 6047A
module is to be installed in a262, 262U, or 260A
Assembly, no external connections to the module
itself need be made. All internal connections in
these assemblies
are factory-prewired, and all
external wiring is simplified through
the use of
female 25-pair micro-ribbon connector-ended
cables arranged in accordance with Universal Ser-
vice
Order Code (USOC) RJ2HX. If the customer's
terminal
equipment is cabled in accordance with
USOC RJ2
HX, direct cable connection to the 262,
262U,
or 260A Assembly and to the customer's
equipment is possible. If not, cross-connections
between the assembly and the local terminal equip-
ment must be made at an intermediate connec-
torized terminal block.
3.04 When
the 6047 or 6047 Amodule is to be
installed in aconventional Type 10 Shelf, external
connections to
the module must be made. Before
making any connections to the shelf, ensure
that
power is off and modules are removed. Modules
should be put into place only after they are prop-
erly optioned and after wiring is completed.
3.05 Table 4lists external
connections to the
6047 and 6047A modules. All connections are
made (to non-connectorized mounting shelves) via
wire-wrapping to
the 56-pin connectors at the rear
of
the modules' shelf positions. Pin numbers are
found on the body of each connector.
connect: to pin
4WIRE RCV IN TIP. ........ .... . ....... 7
4WIRE RCV
IN RING 13
4WIRE
XMTOUTTIP..... . ... 41
4WIRE XMTOUTRING. .47
4WIRE RCV OUTTIP. .. ...5
4WIRE RCV OUT RING..... .15
4WIRE XMT IN
TIP... . 55
4WIRE XMT IN RING..... .49
E lead.................. .. ...... 23
M lead............ .. .. 21
-BAD (-22 to -56Vdc filtered input).... . .. 35
GND (ground).. .17
58 (signal battery)* 1
SG (signal ground)*. .19
T1 (intermodule tip)** 25 and 43
R1 (intermodule ring)**. . 31 and 51
RS TONE IN (ring tone input)** ... .37
4WIRE ReV IN SX (rev simplex, facility side)**. ..11
4WIRE XMTOUT SX (xmt simplex, facility side)** 45
4WIRE ReV OUT SX (rcv simplex, terminal side)** .. . .. 3
4WIRE XMT
IN SX (xmt simplex, terminal side)** 53
EXT LPBK (external ground-controlled loopback)** ..... 9
XMT PATH CUT leadt ...... .27
EXT OSC (external SF tone oscillator)t t. . 39
* Mandatory for Type II and III E&M interfaces only.
** Optional.
t Optional; a ground on this lead cuts (opens) the
transmit voice path.
t t Available only by factory modification.
table 4. External connections to 6047 and 6047 A

practice section 816047/826047 A
option selection extra slope equalization for nonloaded cable), set
3.06 All options on
the 6047 and 6047A mod- S2-1 and S2-2 to ON.
ules are selected via slide or DIP switches whose simplex-Iead/sealing-current selection
locations on the modules' printed circuit boards 3.09 Switch S3 on the main board either pro-
are shown in figure
9. Table 5summarizes these vides access to the module's facility-side simplex
options and
their switch settings, which are ex- ieads or connects the module's integral sealing-
plained in detail below. Each module should be current source such
that current fiows from the
completely optioned and its optioning verified 4wire receive input port and returns via the 4wire
before alignment is attempted transmit output port If the module's own sealing-
Note 1: Included in table 5is achecklist for pre- current source is to be used, set S3 to ON. If
scription optioning of the 6047 or 6047A. Prior to access to the module's simplex leads is required
installation, check marks can be placed
in the (e.g., for application of externally generated sealing
appropriate boxes to indicate the required options. current), set
S3 to OFF.
During installation, the module can then be quickly E&M signaling interface
and easily optioned as indicated in the table without 3.10 Switch S11 on the module's baby board (for
referring to the detailed optioning instructions
in the 6047 A, this is the large baby board, not the
the text Asimilar table and checklist are provided smaller loopback subassembly) conditions the 6047
later in this section
for the alignment switches on or 6047A for Type I, Type II, or Type III E&M signal-
each module. ing interface. Generally,
the single-lead Type I
Note 2: Although the receive equalization DIP interface is used when the module interfaces an
switch is located on the printed circuit boards
of electromechanical switching system or a 4wire sta-
the
6047 and 6047A instead of on their front tion loop and tel set, while the looped-lead Type II
panels, introduction of equalization is more closely or Type III interface is used when the module inter-
related to alignment than to switch-optioning.
Thus, faces an electronic switching system. Determine
instructions for setting the receive equalization DIP
the type of E&M signaling interface required, and
switch are provided
under alignment later in this set S11 to the I(on) position (for Type I or Type III)
section.
or to the 1/ (off) position (for Type II) as appropriate.
4wire-receive-input-port impedance Note 1: For Type IE&M interface, acommon equip-
3.07 Terminating impedance at
the module's ment ground must be used.
4wire receive input port is selected via two-position Note 2: The Type 1/1 E&M interface can be used
DIP switch
S5 on the module's main printed circuit only with A-side E&M signaling (see paragraph
board.
To select 1200 ohms (for loaded cable), set 3.11).
S5-1 and S5-2 to OFF. To select 600 ohms (for non- A-side/B-side E&M signaling
loaded cable or carrier), set S5-1 to ON and S5-2 to 3.11 Switches S10 and S14 on the module's
OFF. To select 150 ohms (which provides approx- baby board select either A-side (conventional
imately
2dB of extra slope equalization for non- terminal-side) or B-side (sometimes referred to as
loaded cable), set S5-1 and S5-2
to ON. "facility-side") E&M signaling. For A-side E&M sig-
4wire-transmit-output-port impedance naling, set both S10 and S14 to the Aposition. For
3.08 Terminating impedance at the module's B-side E&M signaling, set both S10 and S14 to the
4wire transmit output port is selected via two- Bposition. These switches function together,
position DIP switch S2 on the main board. To select and both must always be set to the same
1200 ohms (for loaded cable), set S2-1 and S2-2 to position.
OFF. To select 600 ohms (for nonloaded cable or loopback options (6047A only)
carrier), set S2-1 to ON and S2-2 to OFF. To select 3.12 All loopback options on the 6047 A(except
150 ohms (which provides approximately 2dB of loopback-Ievel adjustment, which is covered under
r---------~,
S3 otF
~
SIMPLEX
o CURRENT
ON
t
loop back subassembly
(6047A only)
'-
55 ..
,~Q[;;L
600'" ReveaUALIZE
1200' ,
Rev IN lMPD.
main board
figure 9.6047 and 6047A option switch locations
page 10
baby board

alignment later in this section) are selected via
five-position DIP switch 52 on the module's loop-
back subassembly. Switch 52-2 controls manual
loopback of the 6047 A. To activate manual loop-
back, set 52-2 to ON. To deactivate manual loop-
back, set 52-2 to OFF. Switches 52-1, 52-3, and
52-4 control two-tone loopback of the 6047 A. If
two-tone loopback (activated by application of
2713Hz tone to the receive input pair) is desired,
set 52-1 to ON to enable the module's tone-
loop back detector. If two-tone loopback is not
desired, set 52-1 to OFF If two-tone loopback is
practice section 816047/826047 A
selected and loopback deactivation by a second
tone only (I.e., no automatic loopback deactivation
after a timeout interval) is desired, set 52-3 and
52-4 to OFF. If two-tone loopback is selected and
automatic loopback deactivation after a 2.6-minute
timeout is desired, set 52-3 to ON and 52-4 to
OFF. If two-tone loopback is selected and auto-
matic loopback deactivation after a 20.8-minute
timeout is desired, set 52-3 and 52-4 to ON. (In
either timeout mode, loopback can be deactivated
prior to timeout by application of 2713Hz tone.) If,
when the 6047 A is optioned for A-side signaling
check-
option
switch
selection settings
list
4wire-receive- 55-1 and 55-2 1200 ohms
55-1 OFF
input·port on main board
,(loaded cable) 55-2 OFF
terminating impedance
600 ohms 55-1
ON
(nonloaded cable 55-2 OFF
or carrier)
150 ohms (extra 55-1 ON
equalization for
55-2 ON
nonloaded cable)
4wire-transmit- 52-1 and 52-2 1200 ohms
52-1 OFF
output-port on main
board
(loaded cable) 52-2 OFF
terminating impedance 600 ohms
52-1 ON
(nonloaded cable 52-2 OFF
or carrier)
150 ohms (extra 52-1
ON
equalization for 52-2 ON
nonloaded cable)
facility-side 53
on
nominal20mA of
ON
sealing current main board internally generated sealing
or simplex leads
current applied to
facility-side xmt and
rev pairs
I
access provided to OFF
facility-side simplex leads
i
I
(e.g .. for application of
Il
externally generated
sealing current)
I
E&M signaling 511 on large
Tvoe Ior Tvoe III interface
!TON)
interface
baby board Type II interface II (OFF)
A-side or B·side 510 and 514 on A-side signaling 510 to A
E&M signaling large baby board 514 to A
B-side signaling 510 to B
514 to B
manual loop back 52-2 on
loopback activated 52-2 ON
(6047A onlv\ loooback subassemblv loopback deactivated 52-2 OFF
tone loopback detector
52-1 on detector enabled for 52-1 ON
for 2713Hz two-tone loopback subassembly two-tone loooback
loopback (6047Aonly) detector disabled for
52-1 OFF
no two-tone loopback
loopback timeout
52-3 and 52-4 on 2.6-minute
52-3 ON
interval
loopback subassembly timeout 52-4 OFF
for 2713Hz two-tone 20.6-minute 52-3
ON
loopback (6047Aonly)
timeout 52-4 ON
no timeout (second-tone 52-3 OFF
deactivation only) 52-4 OFF
Elead forced busy 52-5
on loopback Elead grounded (busy)
52-50N*
during loopback
subassembly
durinQ loopback*
(6047A only)* Elead open (not busy) 52-5 OFF
during loopback I
,II
*The E-Iead forced~busy option can be used only when the 6047A is optioned for A-side signaling and
Type I E&M interface. t
._- -_._.
--
.- .
table 5. 6047 and 604 7A sWitch-option summary and checklist
page 11

practice section 816047/826047A
and Type IE&M interface, it is desired that the E
lead be forced busy (grounded)
during loopback to
prevent seizure of the associated terminal-side
equipment, set 52-5
to ON. If forced busying of the
Elead during loopback is not desired, and/or if the
6047 Ais not optioned for A-side signaling and
Type IE&M interface, set 52-5
to OFF.
alignment (general)
3.13 Alignment of the 6047 comprises three
main parts, with one additional part required for
the
6047 AThese parts are as follows:
A. Introducing facility-side gain into the receive
channel
to derive an internal +7 transmission
level
point (TLP) from the 4wire receive input
level; then introducing terminal-side loss to
derive
the desired 4wire receive output level.
B. Introducing prescription active slope-type ampli-
tude equalization, if required,
to post-equalize
the input to the receive channel.
C. Introducing terminal-side loss into the transmit
channel
to derive an internal -16TLP from the
4wire transmit input level; then introducing
facility-side gain
to derive the desired 4wire
transmit output level.
D. For the 6047 Aonly, introducing the proper
amount of gain or loss into the loopback path
to provide true equal-Ievelloopback (if desired).
prescription alignment
3.14 The 6047 and 6047A are primarily intended
for
prescription alignment In prescription align-
ment, all gain, loss, equalization, and loopback-Ievel
switch settings are determined from circuit records
prior
to installation of the module. These settings
are then noted in
the checklist column of table 6,
which is
the alignment-switch summary table, or on
the circuit layout record (CLR). During installation,
the module can then be quickly and easily aligned
without performing
the detaiied alignment pro-
cedures that follow in the text. Simply refer to the
checklist column of table 6(or to the CLR) and set
all gain, loss, equalization, and loopback-Ievel
switches as indicated.
introduction to non-prescription alignment
3.15 In applications where prescription align-
ment settings are unavailable (and in applications
where prescription alignment does not provide
adequate results), non-prescription alignment of
the 6047 or 6047 Ais necessary. Access to the
appropriate ports of the module is conveniently
provided via its seven front-panel bantam jacks.
Equipment required
for non-prescription alignment
consists of atransmission measuring set
(TMS),
preferably one with independent transmit and re-
ceive impedance settings. If
the module's receive
equalizer is
to be used, aTellabs 9801 or 9802
Card Extender (or equivalent) will facilitate align-
ment by allowing access
to the equalization DI P
switch on each module's printed circuit board and
the loopback-Ievel DIP switch on the 6047A's loop-
back subassembly while the module is in place and
operating.
prealignment switch settings for
non-prescription alignment
3.16 Before beginning actual non-prescription
alignment
of the 6047 or 6047 A, do the following:
A. Ensure that all option switches (see table 5 for
alisting), especially those that select the mod-
ule's
4wire receive input and 4wire transmit
output port impedances, are properly set
B. Ensure that the module's receive equalizer is
excluded from
the circuit (all four positions of
DIP switch 54 set
to ON [up].)
C. For the 6047 Aonly, ensure that the loop back
level is set for zero loss or gain (all six positions
of DIP switch 51 on
the loopback subassembly
set
to OFF.)
D. Set all positions of both front-panel lac gain
DIP switches (xmt and rev) and all positions of
both front-panel term loss DIP switches
(xmt
and rev) to the out position for zero gain or loss
in
either channel.
nonprescription receive-channel alignment
3.17 alignment of the receive channel consists
of
the following: adjustment of the front-panel rev
lac gain switches to derive the receive channel's
internal +7TLP, insertion and adjustment of
the
receive-channel slope equalizer to provide the
required amount of equalization, and adjustment of
the front-panel rev term loss switches to provide
the specified receive-channel output level. Align
the receive channel asfollows:
facility gain:
A. Arrange the receive portion of the TMS for 600-
ohm terminated measurement and connect it
to the module's rev out jack
B. Request the distant facility-side location to
send 1004Hz and 2804Hz tone at the level
specified on
the circuit layout record (CLR).
Measure and record each level.
C. With 1004Hz tone being sent from the distant
end, set the proper combination of front-panel
rcv lac gain DIP switch positions to in so that a
+7dBm ievel is achieved. If equalization for
nonloaded cable is desired, proceed to step D.
If no receive-channel equalization is desired,
proceed
to step F.
nonloaded-cable equalization:
D. If the SF signaling facility consists of non-
loaded cabie, subtract
the 2804Hz level mea-
sured in step Bfrom
the 1004Hz level also
measured in
step B.
E. Set to OFF the proper combination of DIP-
switch 54 positions that approximates as closely
as possible
the difference determined in step E
(the
amount of equalized gain required), as
directed in table
7.
terminal loss:
F. Refer to the CLR for the specified receive out-
put level.
G. Calculate the difference between this specified
output level and
the internally derived +7dBm
level.
page 12

practice section 816047/826047 A
alignment
function switch
selections
settings
checklist
receive~channel front-panel 0.1dB gain
0.1 tolN
facility-side rev fae gain 0.2dB gain 0.2
to IN
flat gain DIP
switch*
OAdB gain 004 to IN
0.8dB gain 0.8
to IN
1.5dB gain 1.5
to IN
3.0dB gain 3.0 to IN
6.0dB gain 6.0
to IN
12.0dB gain 12.0
to IN
receive-channel front-panel
O.ldB loss
O.ltolN
terminal-side rev term Joss
0.2dB loss 0.2
to IN
flat loss DIP
switch*
OAdB loss
004 to IN
0.8dB loss 0.8 to IN
1.5dB loss 1.5
to IN
3.0dB loss 3.0
to IN
6.0dB loss 6.0
to IN
12.0dB loss 12.0
to IN
receive-channel 84-1 through 0.5dB 84-1
OFF (down
slope equalization S4-4** on 1dB
84-2 OFF (down
for nonloaded cable main board 2dB
84-3 OFF (down
(2804Hz gain 4dB
84-4 OFF (down)
re
1004Hz)
transmit-channel front-panel O.ldB loss
0.1 tolN
terminal-side xmt term loss 0.2dB loss 0.2
to IN
flat loss DIP
switch*
OAdB loss
004 to IN
0.8dB loss 0.8 to IN
1.5dB loss 1.5
to IN
3.0dB loss 3.0
to IN
6.0dB loss 6.0 to IN
12.0dB loss 12.0
to IN
transmit-channel front-panel O.ldB gain
O.ltolN
facility-side xmt fac gain 0.2dB
ain 0.2
to IN
flat gain DIP
switch* OAdB aain 004 to IN
0.8dB aain 0.8 to IN
1.5dB gain 1.5
to IN
3.0dB gain 3.0 to IN
6.0dB gain 6.0
to IN
12.0dB gain
12.0to1N
loopback 81-1 through 23dB loss 81-1 ON
gain/loss
81-6 on loopback 0.5dB gain 81-2 ON
(6047A only)
subassembly***
1.5dB gain 81-3 ON
3dB gain
81-4 ON
6dB gain 81-5 ON
12dB gain 81-6 ON
*All front-panel fac gain and term loss DIP-switch positions arecumulative. Total flat gain introduced at a channel's
facility-side port or total flat loss introduced ata channel's terminal-side port is thesum of that channel's fac gain or
term loss DIP-switch positions set to in. For zero gain or zero loss at a particular port, set all positions of the appro-
priate fae
gain or term loss DIP switch to out.
** The four positions of receive-equalizerDIPswitch 54 arecumulative. Total equalizedgain introduced at 2804 Hz(re
1004Hz) is the sum of those 54 positions set to OFF. For no receive equalization, set 84-1 through 84-4 to ON.
*** The six positions of loopback-Ievel DIPswitch $1 on the loopback subassembly(6047 Aonly) are cumulative.Total
gain
or loss introduced into the loopback path is the sum of those $1 positions set to ON. For zero gain or lossin the
loopback path, set St-t through St·B to OFF.
table 6. 6047 and 6047A alignment-switch summary and checklist
H. Set to in the proper combination of front-panel
rcv term loss DIP-switch positions
that adds up
to this difference, thus achieving the desired
receive
output level. This completes alignment
of
the receive channel. Disconnect the TMS
from
the module.
non-prescription transmit-channel alignment
3.18 Alignment of the transmit channel consists
of
the following: adjustment of the front-panel xmt
term loss switches to derive the transmit channel's
internal
-16TLP and adjustment ot the front-panel
page 13
xmt lac gain switches to provide the specified
transmit
output level. Align the transmit channel as
follows:
terminal loss:
A. Remove the transmit speech path cut by seiz-
ing
the circuit from the terminal side (thus
causing
loop current to flow). As an alternative,
if the TMS being used for alignment is equipped
with aholding coil, this can be used
to seize
the circuil.

practice section 816047/826047A
table 7. Equalized gain settings for receive-
channel nonfoaded-cable slope equalizer
B. Set switches 55·1 and 55-2 for 600-ohm ter-
minating impedance at
the transmit output port
if they are not already set for 600 ohms.
C. Arrange the transmit portion of the TMS for
1004Hz tone output at the CLR-specified trans-
mit input level. (If
the TMS has atransmit
impedance setting, select
600 ohms.) Connect
this signal
to the module's xmt in jack.
D. Arrange the receive portion of the TMS for 600-
ohm terminated measurement and
connect it
to the module's xmt out jack.
E. Set the proper combination of front-panel xmt
term foss 01 P-switch positions to in so that a
-16dBm ievel is achieved.
facility gain:
F. Refer to the CLR for the specified transmit out-
put level.
G. Calculate the difference between this specified
output ievel and
the internaiiy derived -16dBm
level.
H. Set to in the proper combination of front-panel
xmt lac gain DIP-switch positions that adds up
to this difference, thus achieving the desired
4wire transmit level.
I. If the required transmit-output-port terminating
impedance is
other than 600 ohms, reset
switches 55-1 and 55-2
for the proper imped-
ance. This completes alignment of
the transmit
channel. Disconnect
the TMS from the module.
At this point, alignment of the
6047 is com-
pleted. For
the 6047 A, however, one procedure
remains; proceed
to paragraph 3.19.
non-prescription loopback-Ievel adjustment
(6047Aonly)
3.19 To adjust the 6047A's loopback-Ievel-controi
circuitry
to provide true equal-level loopback, pro-
ceed as foiiows:
A. From the CLR, determine the specified receive
input and output levels.
B. Subtract the receive input level from the receive
output level. The result wiii be
the amount of
1000Hz·2804Hz
difference
0.0 to 0.2dB
0.3 to 0.7dB
0.8
to l.2dB
1.3to 1.7dB
1.8
to 2.2dB
2.3
to 2.7dB
2.8
to 3.2dB
3.3
to 3.7dB
3.8 to 4.2dB
4.3 to 4.7dB
4.8 to 5.2dB
5.3
to 5.7dB
5.8
to 6.2dB
6.3
to 6.7dB
6.8to 7.2dB
7.3t07.7dB
amount of equalized
gain required
O.OdB
0.5dB
l.OdB
1.5dB
2.0dB
2.5dB
3.0dB
3.5dB
4.0dB
4.5dB
5.0dB
5.5dB
6.0dB
6.5dB
7.0dB
7.5dB
loss required in the loopback path, as indicated
in
the foiiowing equation (also see example
below): amount of loss to
receive output -receive input = inserted in
level level loopback path
c. On the 6047 A's loopback subassembly, set to
ON that combination of DIP-switch 51 positions
which most closely approximates
the amount
of loss determined in step B. At this point, align-
ment of
the 6047A is complete. Remove aii test
cords.
Example: In ahypothetical application, the CLR-
specified receive input level is
-2dBm and the
CLR-specified receive output level is +2dBm. Thus,
we subtract
-2dBm from +2dBm as foliows:
+2dBm - (-2dBm) = +4dB
Thus, 4dB is the amount of loss to be introduced
into the loopback path via DIP switch 51 on the
loopback subassembly. (If the result of the subtrac-
tion were
negative, this would be the amount of
gain required in the loopback path.) To introduce
the required amount of loss, we first set switch
51-1
to introduce 23dB of loss and then set the
remainder of the 51 positions to provide the closest
possible approximation
to 19dB of gain without
exceeding it (23dB of loss plus 19dB of gain equals
4dB of loss, the required amount). In this example,
the closest we can get to 19dB of gain without
exceeding it is 18.5dB (51-6,51-5, and 51-2 set to
ON; 51-4 and 51-3 set to OFF). Thus, we end up
introducing 4.5dB of loss (23dB of loss plus 18.5dB
of gain) into
the loopback path, which puts us
within 0.5dB of true equal-level loopback, atoler-
ance that should suffice in nearly aii applications.
4. circuit description
4.01 To provide the clearest possible understand-
ing ofthe operation
olthe 6047 and 6047 A4Wire-to-
4Wire SF-to-E&M
Network Terminating Modules,
function sequenceflowcharts(figures10 through 12)
that iiiustrate operation of the modules on incoming
and outgoingcaiiswith A-side E&M signaling are pre-
sented in lieu of amore conventional circuit descrip-
tion. Horizontal paths identify events occurring
simultaneously, andvertical paths
denote sequential
events. Dotted lines indicate elapsed time. These
flowcharts can be used
to determine whether amod-
ule is performing normaiiy
by observing the module's
response and comparing
it to that shown in the
flowchart. Reference to the 6047 and 6047A block
diagram (section 5ofthis practice) may aid in under-
standing the flowcharts.
4.02 The flowchartsare
intended to familiarize you
with
the operation of the 6047 and 6047 A for engi-
neering, application, and
troubleshooting purposes
only. Attempts
to test or troubleshoot these modules
internally are not recommended and may void
your
Teiiabswarranty. Proceduresforrecommended test-
ing and troubleshooting in
the field should be limited
to those prescribed in section 7of this practice.
page 14

INCOMING CALL(A-SIDE SIGNALING) practice section
816047/826047A
,-----------
/
!
"
lON'
"VH
_'3<lB .. ,.,
"
"GNA' TO
OU'","O::,"O
I ;:;:C~i::"TY
NO AN"'''" 'UPERV,SlON '"OVID'O
I
II
I
I
II
I
I
II
I
I
I
I
I
I
-T----------------~
ICALL IN
I'ROG"'"
INC""'<NG
"TONE
"".lOveD
INC"""NG
""VEl
-33d"mO'
"
TON'
lOy"
_''''''''''0'
I
I
I
II
I
I
I
I
I
I
L_
R,MOv'XMT
,~lHCUT
figure 1 O. Function sequence flowchart, incoming call
page 15
I
TO DISCONNECT
SEQUENCE
(FIGURE 12)

practice section 816047/826047 A
(
D::~i=~~~</
\1
I
~
NOOI-""O'.,"OO'''''"O
"
TON'
lEV"
_,3d .... O'
OUTGOING CALL(A·SIDE SIGNALING)
DIAliNG
I cO,,",Hno
,
,
,
,
I ~~;'::~:'RH
NO AN'W'. ,uP'"VIS'ON 'ROVIOW
INCOM'NG
"TON'
"
TO"'
lEVEl
_,3dBmll'
I
I
I
I
I
I
I
I
I
,
I
I
I
I
C
J_I I
&om' I
fLOAD I
"""00' \
~~ I
L::""-J -----, I
1- -----'
I CAll'N
I ,FlOG.,,,
j
TO DISCONNECT
SEQUENCE
(FIGURE 12)
flowchart, outgoing call figure 11. Function sequence
page 16
"
"'COM'NG
,,"VEl
""''''"0'
"DO"CTO"
'"
LOW GUARD

practice section 816047/826047 A
DISCONNECT SEQUENCE
I
DISTANT PARTY DISCONNECTS FIRST LOCAL PARTY DISCONNECTS FIRST
INCOMING
CML'
OUTGOING
CALL?
'"
'"
RECEIYING
sF TONE'
'"
,.,
I OISTA'jT PARTY
IDISCONNECTS
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
1-- ---.J
'"
""
SIGNAl_TO
GUARD "ATIO
>'''''8'
'"
"" INCOMING
SFUYH
>_33dBmO'
,-,
'"
,~,
~,
33",.
&FOn.eTa"
"
LOW GUARD
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
II
i-------------J
I
rlOCAl PARTV
DISCONNEcTS
,.,
"
,,.COMING
SfLEYH
>-33<111mO'
"
S'O,.Ac-TO
GUARD RAllO
>111"8'
CIRCUIT
IDLE
figure 12. Function sequence flowchart, disconnect sequence
page 17
CIRCUIT
IDLE
for incoming and outgoing calls

practice section 816047/826047A
maximum line noise
S1dBrnCO
dialing: tone transmitted during the break portions
of dial pUlses
high-level timing
high-level tone is transmitted for 400±100ms follow-
ing each off-hook-to-on-hook transition of M lead
(A-side signaling) or E lead (B-side signaling)
M-Iead states, A-side signaling
idle: open or ground
busy: negative battery (-22 to -S6Vdc)
E·lead states, B·side signaling
idle: open
busy: ground
M-Iead delay (A-side signaling) or E-Iead delay
(B-side signaling)
18±Sms delay between M-Iead (A'side) or E-Iead
(B-side)
state change and SF-tone state change
pulsing characteristics (M lead to SF for A-side, E lead to
SF for B-side)
• input breaks (M-Iead or E·lead on-hook intervals)
shorter than M-Iead or E·lead delay are
not recognized
• input breaks of a duration between that of M-Iead
or E-Iead delay and 50ms are transmitted as
50ms tone bursts
•
input breaks longer than 50ms are transmitted as
tone bursts equal in duration to the input
break duration ±2ms
transmit path cut insertion
transmit speech path is cut (opened) 18±Sms before
transmission of SF tone
transmit path cut removal
transmit speech path cut is removed 125±50ms
after detection of an off-hook condition
I SF receive section
SF tone frequency
2600±1SHz
SF tone detection threshold
-33.SdBmO±2.SdB
SF tone rejection
SOdB minimum, 2S90 to 2610Hz
signaling bandwidth (high-guard state)
7SHz nominal
signaHo-guard ratio for signal detection
6 to 12dB
guard circuit transition timing
high-ta-Iow: 22S±60ms
low-to-high: SO±10ms
band·elimination·filter timing
•insertion time: 13±7ms
•insertion duration for SF tones shorter than
17S±60ms: 22S±SOms (With BEF insertion
duration longer than tone duration in all cases)
•insertion duration for
SF tones longer than
17S±60ms: duration of SF tone plus SO±10ms
seizure delay, removal 01 SF tone to E-Iead ground
(A-side, Type I), to E-SG contact closure (A-side, Type II),
to M-Iead battery (B-side, Type I), or to
M-SB contact closure (B-side, Type II)
60±20ms
page 18
specifications
6.
Note: Exceptwhere indicated, specificationsapplyto
both the 6047 and the 6047 A.
I transmission specifications I
alignment levels
receive input port: -17 to +7TLP
receive output port: +7 to -17TLP
transmit input port: -16 to +8TLP
transmit output port: +8 to -16TLP
overload points
+SdBmO at all ports
facility-side gain (xmt and rev)
o to 24dB in switch-selectable 0.1 dB increments
terminal-side loss (xmt and rev)
o to 24dB in switch-selectable 0.1 dB increments
insertion loss
0±0.2dB at 1004Hz with gain and loss switches set
to zero
receive-channel slope equalization
0.0 to 7.SdB of gain (in switch-selectable
O.SdB increments) at 2804Hz re 1004Hz
terminal-side port impedances (xmt in, rev out)
600 ohms, balanced, 300 to 4000Hz
facility-side port impedances (xmt out, rev in)
1200,600, or 1S0 ohms, balanced, 300 to 4000Hz,
independently switchable at each facility'side port
terminal return loss
ERL greater than 28dB
facility return Joss
ERL greater than 23dB at all three facility-side'port
impedance settings
frequency response
±1 dB re 1004Hz level, 300 to 4000Hz
noise
20dBrnCO maximum at maximum gain
(no equalization)
longitudinal balance, all ports
greater than 60dB, 200 to 4000Hz
delay distortion
less than 80!'s, 400 to 4000Hz, without equalization
total harmonic distortion, all ports
4wire ports: less than 1% at +SdBmO
cross-coupling loss between xmt and rev channels
greater than 7SdB at 1000 and 300Hz
crosstalk Joss between adjacent modules in shelf
greater than 86dB, 200 to 4000Hz
I SF transmit section I
internal SF tone oscillator frequency and stability
2600±SHz for life of unit
SF tone levels
low (idle) level: -20dBmO±1 dB
high level: -8dBmO±2dB
SF tone states
idle: tone transmitted
busy: not tone transmitted

release delay, application of SF tone fa E-Iead open
(A-side, Type I), to E-SG contact release (A-side, Type II),
to M-Iead ground (B-side, Type I), or to M-SB
contact release (B-side, Type II)
33±3ms
dial pulse characteristics, SF to E lead (A-side) or
SF to M lead (B-side)
pulse rate input break ratio
8pps 30 to 80%
10pps 36
to 79%
12pps
44 to 76%
•
input breaks shorter than E-Iead seizure delay
are ignored
• input breaks of a duration between that of E-Iead
seizure delay and 50ms are transmitted as breaks
of50±2ms
• input breaks longer than 50ms are transmitted as
breaks equal in duration to input break
duration ±2ms
current limiting
provided for M(Type I, Bside) and SB (A side) leads
signaling relay(A-side E-Iead, B-side M-Iead)
contact rating
maximum current; 1 ampere
maximum voltage: 200Vdc
contact resistance: 50 milliohms maximum
contact protection: internal transient protection
is provided
sealing-current source and simplex leads
sealing current (facility side)
nominal20mA sealing current, excludable via
switch
option for normal facility-side
simplex-lead derivation
simplex current (facility and terminal sides)
100mA maximum with 2mA maximum unbalance
external oscillator requirements
(optional by factory modification)
frequency
2600±2Hz
level
0.5Vrms
load impedance
75 kilohms minimum, unbalanced
loopback specifications (6047A only)
loopback control modes
activation deactivation
loopback
auto-
control 2713Hz option 2713Hz option
matic
mode
tone switch tone switch timeout
manual X X
two-tone wI
no timeout XX
two-lone wi
2.6-minule
timeout X X timeout
two-tone wi 2G.B-minute
timeout X X timeout
tone-Ioopback frequency
2713±35Hz
tone-Ioopback detection threshold (at 2713Hz)
-26.0dBmO
practice section 816047/826047 A
tone-Ioopback guard ratio
greaterthan 3.0dB
tone-Ioopback activation timing
loop back is activated upon removal of
1.4±O.2~second or longer tone
tone-/oopback deactivation timing
loopback is deactivated after receipt of
0_7±0.15-second or longer tone (removal of tone not
necessary for deactivation)
loopback level adjustment
o to 23dB of loss or gain in switch-selectable
increments (23dB loss; 0.5,1.5,3,6, and 12dB gain)
I power requirements I
input voltage
-22 to -56Vdc, filtered, ground referenced
input current
B6mA maximum at idle, 95mA maximum when busy,
with an additional 25mA required when the internal-
sealing-current
option is selected and, for the 6047 A
only, another 40mA required when loopback
is activated
I physical I
operating environment
20 to 130°F (-7 to +54°C), humidity to 95%
(no condensation)
dimensions
5.58 inches (14.17cm) high
1.42
inches (3.61 cm) wide
5.96 inches (15.14cm) deep
weight
6047: 11 ounces (312 grams)
6047A: 12
ounces (340 grams)
mounting
relay rack or apparatus case via one position of a
Tellabs lYpe 10 Mounting Shelf; can also be
mounted in
one position of aTellabs 262U, 262, or
260A Mounting Assembly
7. testing and troubleshooting
7.01 Due to the complexity of the 6047 and
6047 A 4Wire-to-4Wire SF-to-E&M Network Ter-
minating Modules, a detailed testing guide check-
list is not included in this practice. Such a checklist
would be so long and complicated as to be of
dubious value for troubleshooting in the field.
Proper operation of each module can be verified,
however, by
observing its actual operation while
referring to the function sequence flowcharts (fig-
ures 10 through 12) that summarize the module's
correct operation on incoming and outgoing calls.
In addition, atroubleshooting guide in
this section
lists a variety of trouble conditions along with pos-
sible causes and possible solutions for each. If a
module is not performing properly, look up the
problem in the troubleshooting guide and check all
the possible causes listed opposite the problem. If
this does not correct the problem, substitute a new
module, if possible, and observe its operation. If the
substitute module operates correctly, the original
should be considered defective and returned to
page 19

practice section 816047/826047A
Tellabs for repair or replacement. We strongly
recommend
that no internal (component-level) test-
ing
or repairs be attempted on the 6047 or 6047 A
module. Unauthorized testing
or repairs may void
the module's warranty.
Note: Warranty service does not include removal of
permanent customer markings on the front panels
of Tellabs modules, although an attempt will be
made to do
so. If amodule must be marked defec-
tive,
we recommend that it be done on apiece of
tape or on aremovable stick-on label.
7.02 If asituation arises
that is not covered in
the troubleshooting guide, contact Tellabs Cus-
tomer Service at your Tellabs Regional Office or at
our Lisle, Illinois, or Mississauga, Ontario, head-
quarters. Telephone numbers
are as follows:
US central region: (312)
969-8800
US northeast region: [phone]
US southeast region: [phone]
US western region: [phone]
Lisle Headquarters: [phone]
Mississauga Headquarters: [phone]
7.03 If a 6047 or 6047 Ais diagnosed as defec-
tive,
the situation may be remedied by either
replacement or repair and return. Because it is
more expedient,
the replacement procedure should
be followed whenever time is acritical factor
(e.g.,
service outages, etc.).
replacement
7.04 To obtain areplacement 6047 or 6047 A
module, notify Tellabs via letter (see address below),
telephone (see numbers above), or twx (910-695-
3530 in the USA, 610-492-4387 in Canada). Be
sure
to provide all relevant information, including
the 8X6047(A) part number that indicates the issue
of
the module in question. Upon notification, we
shall ship areplacement module to you. If the mod-
ule in question is in warranty,
the replacement will
be shipped at no charge. Pack
the defective 6047
or 6047 Ain the replacement module's carton, sign
the packing slip included with the replacement,
and enclose it with
the defective module (this is
your return authorization). Affix the preaddressed
label provided with
the replacement module to the
carton being returned, and ship the module pre-
paid
to Tellabs.
repair and return
7.05 Return the defective 6047 or 6047 Amod-
ule, shipment prepaid,
to Tellabs (attn: repair and
return).
in
the USA: Tellabs Incorporated
4951 Indiana Avenue
Lisle, Illinois
60532
in Canada: Tellabs Communications Canada, Ltd.
1200 Aerowood Drive, Unit 39
Mississauga, Ontario, Canada L4W 2S7
Enclose an explanation of
the module's malfunc-
tion. Follow
your company's standard procedure
with regard to administrative paperwork. Tellabs
will repair
the module and ship it back to you. If the
module is in warranty, no invoice will be issued.
(lroubleshooling guide on page 21)
page 20