Tellabs 6162 User manual

Ytellabs
technical manual
76-816162
rev A
practice section 816162/816162A/8161628/816162C
©Tellabs, Inc., -I May 1985
all rights reserved, printed in USA
figure 1. 6162A 4Wire-to-2Wire
SF-to-E&M Terminal
Repeater module
•Isolation transformers at both facility-side 4wire
ports and
at the terminal-side 2wire port.
•
Independently switch-selectable 1200 or 600-
ohm terminating impedance at each 4wire facil-
ity-side port, and switch-selectable
900 or
600-ohm terminating impedance in series with
2.15p.F at the terminal-side 2wire port.
•Integral
compromise balance network (CBN),
with provision for external precision balance
network (PBN).
•From 0
to 0.030p.F of switch-selectable network
build-out (NBO) capacitance in O.o02p.F
increments.
•Switch-selectable Type
I, II, or III E&M interface.
•Switch-selectable A-side or B-side
E&M signaling.
•Integral
2600Hz SF tone oscillator.
•Front-panel LED's
that light to indicate local
E-Iead and M-Iead busy.
•Reverse-battery and overvoltage protection.
•
Opening and monitoring bantam-type jacks at
all ports (6162 and 6162A only).
•Local or remote signaling and equal-level trans-
mission
loopback (6162A and 6162C only).
1.05 The
loopback circuitry on the 6162A and
6162C provides the following features:
•Ability
to remotely perform facility, level, and
equalization transmission tests.
•Ability
to remotely test the following signaling
circuitry:
1) SF detector.
2) SF transmitter (both augmented and normal
levels).
3) Transmit path cut.
4) E&M
detectors and signaling relay.
5) Signaling logic.
page 1
page 2
page 5
page 9
page 14
page 10
page 16
table 1. 6162X module selection guide
6162, 6162A, 61628, and 6162C 4Wire-to-2Wire
SF-to-E&M Terminal Repeaters
~
J.'~
module
front-panel jacks
loopback
6162
ves no
6162A yes yes
61628
no no
6162C
no yes
1.04 All four 6162X modules offer the following
features:
•
2wire-to-4wire conversion via an integral mag-
netic hybrid.
•From 0
to 24dB of prescription-set gain or loss
in both
the transmit and receive channels at the
facility-side ports.
•From 0
to 24dB of prescription-set loss in both
the transmit and receive channels at the ter-
minal
side (on the 4wire side of the hybrid).
•Prescription receive-channel
amplitude equal-
ization equivalent
to that provided by the
Western Electric
309B Prescription Equalizer.
contents
section 2 general description
section 2 application
section 3 installation
section 4 circuit description
section 5 block diagram
section 6 specifications
section 7 testing and troubleshooting
1. general description
1.01 The 6162, 6162A, 61628, and 6162C 4Wire-
to-2Wire SF-to-E&M Terminal Repeaters are Tellabs
Type
10 plug-in modules that provide both active
transmission interface and signaling conversion
between a 4wire metallic facility that uses 2600Hz
single-frequency (SF) signaling and a 2wire PBX
trunk or carrier channel that uses E&M signaling.
All
four 6162X modules meet the specifications
given in AT&T Technical Reference Pub 43002 for
Network Channel Terminating Equipment (NCTE)
Criteria, and, in addition,
the 6162A and 6162C
meet the specifications given in Pub 43004 for
Transmission and Signaling Loopback Criteria.
1.02 In
the event that this practice section is
reissued,
the reason for reissue will be stated in
this paragraph. In those parts of this practice that
apply equally to the 6162, 6162A, 6162B, and
6162C, all four modules are, for convenience,
referred to as the 6162X module.
1.03 While all four 6162X NCTE modules share
the same basic transmission-interface and signaling-
conversion circuitry, they differ through the pres-
ence or absence of loopback capability and of
front-panel jacks. Table 1lists
the differences be-
tween the four 6162X modules.
page 1

practice section 816162/816162A/816162B/816162C
• Manually activated (local) loopback via switch
option.
•
Manually activated (local) loopback via ground
on the MLB lead or contact closure between
the MLB and MLBG leads.
•
2713 Hz tone-activated (remote) loopback with
second-tone or automatic timeout (see below)
loopback deactivation.
•
Automatic deactivation of tone loopback after
switch-selectable 4-minute or 20-minute time
out interval.
•
From-23 to +24dB of prescription-set gain (in
switch-selectable 1 dB increments) for true
equal-Ievelloopback.
• Option switch for busying out the module's ter-
minal side
during loopback, if desired.
•Front-panel
status-indicating LED that lights
when the module is in loopback.
2. application
2.01 The 6162X 4Wire-to-2Wire SF-to-E&M Ter-
minal
Repeater module is typically used to inter-
face a
4wire SF transmission facility with a 2wire
E&M trunk or line associated with a two-way dial!
supervisory telephone circuit. No external transmis-
sion
interface circuitry is needed because the
6162X module combines the functions of a 4wire-
to-2wire li~le amplifier, an SF transceiver, an SF-to-
r ... ~.LcJl~~~ .•.. ·.i-((f~.~. lW- ;~
I r: '<}! } J+ #: e" iJ
-~_~. __ 2!1 Sf fl'lSBSG +- S"~1
III 111' .... 1L ------l- _
IINl f Hf AU L...-~ __L ~ _
I I TL 12M
I INTEHrAn
figure 2. Typical short-haul tie-trunk circuit
using 6162X NCTE modules
E&M signaling converter and a 4wire/2wire pad/
transformer module. Figures 2 through 4 show
three typical applications.
2.02 In its
transmit and receive channels, the
6162X module provides from 0 to 24dB of prescrip-
tion gain or loss in 0.1 dB increments at the 4wire
facility-side ports,
and from 0 to 24dB of prescrip-
tion loss in 0.1 dB increments in both the receive
and
transmit paths at the 4wire side of the hybrid
(see
block diagram) to facilitate proper setting of
internal TLP levels. Prescription receive-channel
equalization can be introduced by a circuit equiv-
alent
to the WECo 309B. The terminating impedance
at the facility-side ports can be independently
switch-optioned for balanced 1200 or 600-ohm ter-
minating impedance. The terminal-side 2wire port
can be
switch-optioned for balanced 900 or 600-
ohm terminating impedance in series with 2.15flF.
2.03 Table 1in section 1 of this practice will aid
in
determining which module is best suited for a
particular application. Typically, if loopback is
required, it
need only be provided by one module of
a loop-extending pair of 6162X's (usually at the ter-
minal end). Front-panel
jacks may be unnecessary
if prescription alignment is to be used exclusively.
2.04 In
applications where the serving telephone
company uses facility-side SF signaling, the 6162X
module fulfills the signaling-application requirements
listed in
table 2. Please note that in this table, A-
side and B-side
are the E&M signaling arrange-
ments of the port that the 6162X interfaces.
2.05 The
6162X module can be optioned to pro-
vide
either A-side E&M signaling (where M-Iead
signals are
incoming to and E-Iead signals are
outgoing from the module) or B-side E&M signaling
(where E-Iead signals are
incoming to and M-Iead
signals
are outgoing from the module) on the ter-
minal side.
figure 3. Typicallong-/Jaul analog tie-trunk circuit using 6162X NCTE modules
figUle 4. Typical long -haul dIg/tal tie-trunk circuit using 6162X NCTE modules
page 2

E&M
6162XX signaling
Registered
E&M
signaling
directions
Facility
inter-
arrange-
Interface Code face
ment* Elead
M lead
TL11 MType I
Aside
out
in
TLllE
Type IBside in Qut
TL 12M Type II Aside out
in
TL 12E Type II Bside
in
out
N/A Type
III Aside
Qut in
*Of port that 6162X is interfacing.
table 2. SF signaling and E&M interface optioning for
Registered Facility Interface Codes
2.06 In typical A-side E&M signaling with Type I
interface,
the 6162X provides an E-Iead output that
is open when SF tone is detected and that is at
ground otherwise. In the transmit channel, SF tone
is transmitted when the Mlead is either open or at
ground, and ceases when the Mlead goes nega-
tive. The E-Iead
output from the 6162X is derived
via relay contacts, which can be
externally wired to
accommodate any E-Iead interface (Type I, II or III).
The relay is energized
when the module detects no
SF
tone at the receive input and is de-energized
when the SF tone is detected. The 6162X's full pre-
cision receive pulse
corrector restricts the pulsing
relay
to nominal 58% break.
2.07 In typical B-side E&M signaling
with Type I
interface,
the 6162X provides an M-Iead output
that is at ground when SF tone is detected and is
at
battery potential otherwise. In the transmit chan-
nel, SF tone is transmitted when the Elead is open
and ceases
when the Elead goes to ground. The E-
lead
output from the 6162X is derived via relay
contacts, which can
be externally wired to accom-
modate
either Type I or Type II E&M-Iead interface
practice section 816162/816162A/816162B/816162C
(Type III interlace cannot be used with B-side
signaling). The relay is
de-energized when the
module detects no SF tone at the receive input and
is
energized when the SF tone is detected.
2.08 The 6162X interfaces the receive path on
the facility side at any TLP from -17 to +7. Idle-
state SF tone is received at alevel of -20dBmO. A
higher level of -8dBmO is received during break
portions
of dial pulses and for about 400ms at the
beginning of each tone interval. Within approx-
imately
13ms of detection, a band-elimination filter
(BEF) is inserted into the receive transmission path
to prevent propagation of SF tone beyond the mod-
ule. See tables 3and 4 for details concerning BEF
insertion.
2.09 The
6162X interfaces the transmit path on
the facility side at any TLP from +8 to -16 and
transmits tones at either of two levels. During the
idle state, the module transmits SF tone at
-20dBmO. During dial pulsing and also for the first
400ms each time it applies tone to the facility, the
6162X transmits SF tone at a higher level of
-8dBmO. This momentarily increased tone level
aids in
detection of supervisory-state changes and
incoming dial pulsing.
2.10 The
transmit voice path through the 6162X
is cut (opened) during idle circuit conditions and is
restored
when the Mlead (A-side signaling) or the
Elead (B-side signaling) is in the busy condition.
The path is also
cut during dialing in either direc-
tion and is momentarily cut in response to any tran-
sition 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
circuit condition SF tone states
local condition of xmt path cut
local rev-path
band-elimination-filter (BEF)
xmt
rcv before change after
insertion
idle on on cut
none cut
inserted
seizure on/off on cut stays cut 125±50ms
not cut inserted
transition
after seizure
distant end returns off on/off not cut none
not cut removed 50±5ms after
delay-dial signal transition
cessation of SF tone
distant end sends
off off/on
not cut none not cut
inserted 13±7ms after
start-dial signal
transition
receipt of SF tone
local-end dialing off/on and on
not cut precut 15±7ms; not cut
inserted
on/off
remains cut as long as
transitions,
M-Iead make/break
ending with transitions are less
on/off
than 125±25ms apart;
transition remains cut 125±50ms
after last break/make
transition*
distant end off on not
cut none not cut
inserted
answers (free call
distant end
off on/off
not cut none
not cut removed 50±5ms after
answers (toll call)
transition
cessation of SF tone
talking off off not cut
none not cut
out of circuit
disconnect, off/on off not cut
precut 15±7ms; not cut
out of circuit
local end first
transition cut 625±125ms after
M-Iead transition from
battery to ground*
disconnect, on off/on not cut
cut within 35ms cut inserted 13±7ms after
distant end
transition
receipt of SF tone
idle on on
cut none cut
inserted
*E-Iead transition for B-side signaling.
table 3. SF tone states and status of transmit path cut and receive BEF for local call origination
page 3

practice section 816162/816162A/816162B/816162C
circuit condition SF tone states
local condition of xmt path cut local rev-path
band-elimination-filter (BEF)
xmt rev before change after insertion
idle on on
cut none cut inserted
seizure, distant end on
on/off cut remains cut 625±
not cut removed 50±5ms after
transition 125ms after cessation
cessation of SF tone
of SF tone
distant end returns
on/off off not cut cut 1 25±50ms after not cut out of circuit
delay-dial signal transition
M-Iead transition from
ground to battery*
local end returns
off/on off not cut precut 15±7ms; re- not cut out of circuit
start-dial signal transition
mains cut 625±125ms
after M-Iead transition
from battery to ground*
distant end
on
off/on and not cut cut within 7ms of not cut inserted 13±7ms after
1ransmits on/off tran-
receipt of first tone receipt of first tone pulse;
dial
pulses sitions, ending
pulse; remains cut as remains in circuit until 50±
with on/off
long as incoming break/
5ms after last incoming on/
transition make transitions are off
transition or 225±50ms,
less than 625±125ms whichever is longer
after last incoming on/
off transition
local-end
on off not cut none not cut out of circuit
answers (free call)
local
end
on/off
off
not cut cut 125±50ms after not cut out of circuit
answers (toll call) transition
M-Iead transition from
ground to battery*
talking off off not cut none not cut out of circuit
disconnect, off
off/on not cut none not cut inserted 13±7ms after
distant end
I
transition
receipt of SF tone
disconnect,
off/on on not cut
I
precut 15±7ms; then cut inserted
local end transition continuously cut
idle on on
cut none
cut
inserted
*E-Iead transition for B-side signaling.
table 4. SF tone states and status of transmit path cut and receive BEF for distant-location call origination
E
X
PBX TRUNK CIRCUIT
the off-hook state (B-side signaling). These path
cuts prevent transmission of noise, transients,
speech,
and other interfering signals during critical
signaling intervals.
2.11
Figures 5 through 9 show the various E&M
signaling interfaces listed in table 2. Either Type I,
II, or III E&M signaling interface can be selected via
switch. Type Iis
often used with electromechanical
switching systems, while Types II and III are often
used in electronic switching environments.
figure 5. Type I E&M interface (TL 11 M); A side
I
c:
23
1>--< ~~~
E1 'E ~ ----;7 -48V
EI
19 I
SG >---< <SG l
I=
./ 0 1,1
-48V~ 1>---< ::=JB
M
M.LEAD 21 1
~DETECTOR ~ 1>-< M
- 1
________ ~6~X.J
figure 6. Type 1/ E&M interface (TL 12M); A side
page 4
, 1
E 23", 1>---< L..--J HEAD L..:".
~ ex ;;[>-<1::" Imi'"'1 / u,
_, MLEAD ~I I
n DETECTORI M /' >-< IM
- I M
o1I 1
-48V",=<---tr.:::;; 5B> 1>-----< 1 5B
6162X I 1 PBX TRUNK CIRCUIT
__________ . L _
figure 7. Type 1/1 E&M interface; A side
-"---- I 1
L.- I E·LEAO ~"- 1>---< 1 ./
-48v~1 I""C
E
_~48V : :
I 1
21 I I c-M'LEAD
MI>----<I<MI DETECT~
=I I -
________ ~6~x_1 L~X~R_'=_N~C~C_'=_I~ _
figure 8. Type I E&M interface (TL 11 E); B side
II
L.. I E·LEAD l-...E .... : >-< I ::=J
-
48V
"'l DETECTOR I E"7
1:E E
r-_-..:
1
..:...
9:;;. I>----<1
.J: 5G I5G
=1I :./ Q --...
c:
B
1>-<1~-48V
M 21 1 I ~'LEAD
M1 >-----< 1 <M OETECTOR
1 -
6162X I I PBX TRUNK CiRCUIT -
___________ L _
figure 9. Type /I E&M interface (TL 12E); B side

2.12 The 6162X module uses relay contacts to
derive E-Iead and M-Iead signaling. This facilitates
interfacing
with nonstandard E-Iead and M-Iead
voltage levels and polarities.
When these modules
are used with Type II E&M interface, terminal-side
equipment can use any convenient voltage or
polarity.
2.13 Generally, if
loopback is to be used, the
terminal-end module will be the one requiring loop-
back capabilities (6162A or 6162C). Equal-level
loopback is made possible via the loopback level
switches,
which provide from -23 to +24dB of gain
in 1 dB increments. The loopback circuitry also pro-
vides signaling
loopback functions for remote test-
ing
of the SF and E&M signaling circuitry. Some
examples of signaling loopback use are as follows:
A. After loopback is initiated, 2600Hz tone is
transmitted toward the terminal end at
-10dBmO
and again at -20dBmO. In both cases, the
receive channel should echo back an SF tone
at -20dBmO after an initial 400ms tone burst at
an augmented level of -8dBmO.
B. Pulsed SF tone is transmitted toward the ter-
minal end. The receive
channel should echo
back pulsed SF tone at anominal 58% break.
2.14 Several modes of
loopback initiation and
removal are available; all are
selected via option
switches. These modes are described in section 3
of this practice.
3. installation
inspection
3.01 The 6162X 4Wire-to-2Wire SF-to-E&M Ter-
minal
Repeater module should be visually inspec-
ted upon arrival
to find any damage incurred during
shipment. If damage is noted, aclaim should
immediately be filed with the carrier. If stored, the
module should be visually inspected again prior to
installation.
mounting
3.02 The 6162X mounts in one position of a
Tellabs Type
10 Mounting Shelf, in one position of a
Tellabs
262U Universal Network Terminating Sys-
tem Assembly,
or in one position of aTellabs 260A
Signaling and Terminating System Assembly, all of
which are available in configurations for relay-rack
and apparatus-case installation. The
module plugs
physically and electrically into a56-pin connector
at the rear of its shelf or assembly position.
3.03 In applications
where a 6162X module is to
be installed in a 262U Assembly, no additional con-
nections need be made. This is because all of the
assembly's internal connections are factory-
prewired and because external
wiring is simplified
through the use of female 25-pair 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 RJ2HX, direct connection between the
262U Assembly and the customer's equipment is
possible. If not,
cross-connections between the
practice section 816162/816162A/816162B/816162C
assembly and the local terminal equipment must
be made at an intermediate connectorized terminal
block or by means of an optional adapter cable
available as alist number for the 262U Assembly.
installer connections
3.04 When a 6162X module is to be installed in a
conventional Type 10 Shelf, external connections
to the module must be made. Before making any
connections to the mounting shelf or assembly,
make sure
that power is off and modules are
removed. Modules should be put into place only
after they are properly optioned and after wiring is
completed.
3.05 Table 5lists external
connections to the
6162X module. All connections to non-prewired
mountings are made via wire-wrapping to the 56-
pin connector at the rear of the module's shelf or
assembly position. Pin numbers are found on the
body of the connector.
connect: to pin:
4WIRE RCV TIP , 7
4WIRE RCV RING
13
4WIRE XMTTiP 41
4WIRE XMT RING 47
4WIRE RCV SX ....... .. ........... .. ................ .. 9
4WIRE XMT SX
43
2WIRE TIP (terminal side) 55
2WIRE RING (terminal side) 49
EXTERNAL PBN 5 and 15
Alead 51
Blead 3
Elead 23
Mlead 21
SB lead 1
SGlead 19
MLB (manual loopback) 18
MLBG (manualloopback ground) 37
-BAIT (-43 to -52Vdc filtered input) 35
GND (ground) 17
table 5. External connections to 6162X
option selection
3.06 A number of option switches must be set
before the 6162X can be placed into service.
These
switches and their functions are described
in paragraphs 3.07 through 3.12. The locations of
the switches on the module's printed circuit board
are
shown in figure 10. Table 6 summarizes all
switch options and provides a convenient checklist
for optioning the module.
impedance matching
3.07 Two-position slide switches S1 and S2 on
the main board select balanced terminating im-
pedance of either 600 ohms or 1200 ohms for
each of the module's facility-side ports as follows:
switch
port
81
receive input (facility side)
S2
transmit output (facility side)
Option the facility-side ports (rev in and xmt out) for
1200 ohms when interfacing loaded cable or for
600 ohms when interfacing nonloaded cable or
carrier.
page 5

practice section 816162/816162A/816162B/816162C
3.08 Two position slide switch S3 selects 900 or
600-ohm terminating impedance at the module's
terminal-side (2wire) port.
Option the 2wire port for
900 ohms when it interfaces loaded cable or 900-
ohm equipment and for 600 ohms when it inter-
faces nonloaded cable or 600-ohm equipment.
E&M signaling
interface
3.09 Switch SlO selects Type I, Type II, or Type III
E&M interface.
Determine the E&M interface of the
terminal equipment interfaced by the 6162X and
set S10 to either 1/1/1 (Type I or Type III) or /I (Type
II), as appropriate.
3.1 0 Switch S 11 shou Id be set according to
which E&M signaling arrangement the terminal
equipment uses (A-side or B-side). If the 6162X is
to receive M-Iead signals and send E-Iead signals,
set S
11 to A. If the module is to send M-Iead
signals and receive E-Iead signals,
set S11 to B.
See table 7 for Registered Facility Interface Code
cross-references.
-__ / 2W I MPEDANcr
517 516
522
54
~~~~~~B~ 53
, HT-_./ '------BW- ./ 9001 c:.:::.IS:J Ibu('
TOP VIEW
BOTTOM VIEW
511
521
figure 10. 6162X option switch locations
52
~l?Vl
~6()O
510
option
paragraph switch selection
settings
checklist
facility-side
600 ohms 600
receive in 3.07 51
impedance
1200 ohms 1200
facility-side
600 ohms 600
transmit out 3.07 S2
impedance 1200 ohms 1200
terminal 600 ohms 600
side 3.08 53
impedance 900 ohms 900
Type I, Type II
Type I or III
1/111
or Type III 3.09 510
E&M interface
Type II II
A-side or
A-side int. A
B-side
3.10 511
E&M signaling
B-side int. B
PBN
internal CBN INT
used
3.11 PBN
external PBN EXT
terminal-side
600 ohms 600
impedance
3.11
600/900
900 ohms
900
terminal-
2 add 0.002,uF IN
side
build-out 3.11
4 add 0.004,uF IN
capacitance
(,uF/1 000
8 add 0.008,uF IN
switches)
16 add 0.016,uF IN
Note: The following options are available on the 6162A and 6162C only.
busy out
LPBK
no busy out
(up)
terminal side 3.12 BO
during loop back busy out
80
manual LPBK loopback off
(up)
loopback 3.12
ML
activation loopback on ML
tone
I
LPBK disabled
(up)
loopback 3.12 TL
activation
enabled TL
tone loop back LPBK
disabled
(up)
automatic 3.12 TO
timeout
enabled TO
automatic LPBK 4 minutes
4
timeout 3.12
4/20
duration
20 minutes 20
table 6. 6162X option-switch summary and checklist
page 6

practice section 816162/816162A/816162B/816162G
figure 11. Level coordination in 6162X
3.15 The 6162X module is primarily intended for
prescription alignment. This involves setting all gain
and equalization
switches according to specifica-
tions on the circuit layout record (CLR) prior to
installation of the module. Simply indicate the
proper settings in the checklist column of table 8;
then refer to the table while performing the align-
ment procedure. In cases where CLR specifications
are unavailable
or inadequate, non-prescription
alignment method is necessary. These procedures
are given in paragraphs 3.16 through 3.19.
tone for aminimum of 1.2 seconds; the other is
automatic timeout deactivation after a selected
length of time (see below).
TO, loopback timeout:
If
automatic deactivation of tone-activated
loopback after a timeout period is desired, set
the TO switch toward TO. otherwise, tone
activated loopback can only be deactivated by
a
second tone burst.
4/20, loopback timeout duration:
The
4/20 switch selects the timeout period for
automatic deactivation of tone-activated loop-
back.
Set this switch to 4if a 4-minute timeout
period is desired or to 20 if a 20-minute timeout
is desired. (This switch is enabled only when
loopback timeout is selected via the TO switch.)
alignment
3.13 Alignment of the 6162X module comprises
the following procedures performed in sequence
(all option switches should already be properly set
as described above):
A. Setting the receive-channel levels.
B. Introducing receive-channel equalization, if
necessary.
C. Setting the transmit-channel levels.
D. Setting the loopback-path level (6162A and
6162C only).
3.14
Because internal TLP levels of +7TLP in
the receive path and -16TLP in the transmit path
must be
maintained regardless of external levels,
two level control circuits are present in each path.
This is
shown in figure 11.
2wire
port
TERMINAL
SIDE
fell attenuatar provides
loss to derive required
2wire output level from
internal i7 rell TLP
xmt attenuatar provides
loss to derive internal
-16TLP from 2wire
mput level
rev amplifier provides
gam to derive internal
+7TLP from 4wire
rev level
xmt <Impllfier provides
gam to derive requHp.d
4witf! xmt level from
lI1ternal -16 xmt TLP
FACILITY
SIDE
4wire //I
receive port
4wire
transmit port
Registered
E&M
terminal-
Facility signal-
equipment switch settings
Interface ing
E&M
Code interface signaling
S10 S11
TL 11M
Type I A side
1/111
A
TL 11E
Type I B-side
1/'" B
TL
12M
Type II A-side II A
TL12E
Type II B-side II B
N/A
Type III A-side 1/111
A
table 7. A-side/B-side and Type 1/11/111 optioning for
various Registered Facility Interface Codes
terminal-side compromise balance network
(CBN) optioning
3.11 The integral CBN is aligned via six-position
DIP switch
84 as follows:
P8N,INT/EXT:
Generally, the 6162's integral compromise balance
network (CBN) will be used unless the use of
an external PBN is desired. Set the P8N switch
to INT if the 6162X's internal CBN is to be
used. If an external precision balance
net work
(PBN) is to be used, it should be connected to
pins 5and 15 and the P8N switch should be
set
to EXT
600/900, compromise balance network:
The 600/900 switch selects the impedance of
the CBN.
80G; jLF/1 000 build out capacitance:
Network build-out capacitance is introduced
via the jLF/1000 switches. The values of the
switches are denoted in thousandths of a
microfarad and are cumulative; thus, the
amount
of BOC introduced is the sum of those switches
set
to IN.
loopback optioning (6162A and 6162C only)
3.12 The five-position LP8K DIP switch on the
module's subassembly is used to select several
loopback functions as follows:
80, busy out terminal side:
Set
the 80 switch toward 80 if the terminal
side is to be busied out during loopback or
away from 80 if not.
ML, manualloopback:
Set the ML switch toward ML to manually place
the module into loopback. Please note that
when manual loopback is in effect, loopback
cannot be deactivated by 2713Hz tone. Set the
ML switch away from ML to deactivate manual
loopback.
TL, tone loopback:
Set the TL switch toward TL to enable tone-
activated loopback. In this mode, loopback is
activated
when a 2713Hz tone burst is applied
to the facility-side receive input pair (pins 7and
13) for aminimum of 2.5
seconds and then
removed. When loopback is activated in this
manner, it can be deactivated in either of two
ways. One is application of a second 2713Hz
page 7

practice section 816162/816162A/8161628/816162C
alignment
function switch selections
setting checklist
transmit-channel front-panel xmt fac
loss Is
loss orgain
level loss/gain gain gn
transmit-channel front-panel
0.1 dB (gain or loss) 0.1 to IN
facility-side
xmt fac level 0.2dB (gain or loss) 0.2
to IN
level
adjustment DIP switch*
OAdB (gain or loss) 004 to IN
0.8dB (gain or loss) 0.8 to IN
1.5dB (gain or loss) 1.5
to IN
3.0dB (gain
or loss) 3.0 to IN
6.0dB (gain
or loss) 6.0 to IN
12.0dB (gain or loss) 12.0 to IN
transmit-channel front-panel
0.1dB loss 0.1 to IN
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
6.0dBloss 6.0 to IN
12.0dB loss 12.0to1N
receive-channel front-panel rcv fac
loss Is
loss or gain level loss/gain gain gn
receive-channel front-panel
0.1 dB (gain or loss) 0.1 to IN
facility-side rcv fac level
0.2dB (gain or loss) 0.2 to IN
level
adjustment DIP switch* OAdB (gain or loss)
OAtolN
0.8dB (gain or loss) 0.8 to IN
1.5dB (gain or loss) 1.5 to IN
3.0dB (gain or loss) 3.0
to IN
6.0dB (gain
or loss) 6.0 to IN
12.0dB (gain or loss) 12.0 to IN
receive-channel front-panel
0.1dB loss 0.1 to IN
terminal-side
rcv 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 12.0to1N
receive-channel
8LOPE
loaded or non loaded cable down for loaded
equalization up for nonloaded
1 1 to IN
2
2toiN
4 4 to IN
8
8toiN
HT 11 to IN
2
2toiN
4 4toiN
8
8toiN
BW 11 to IN
2
2toiN
4 4toiN
8
8toiN
loopback 816-1 through 23dB loss 816-1 to IN
gain/loss 816-6*
1dB gain
816-2to1N
2dB gain 816-3 to IN
3dB gain
816-4to IN
6dB gain
816-5to1N
12dB gain
816-6 to IN
.. Thexmt level. rcv level, and loopback level (816) DI P-switch positions are cumulative. Total transmission loss orgain in each channel
and totalloopback-path loss or gain are the sum of the respective DIP-switch positions set to IN.
table 8. 6162X alignment-switch summary and checklist
page8

Note: Because the 6162B and 6162C do not have
test jacks,
non-prescription alignment of these
modules is
not recommended. If, however, non-
prescription alignment is necessary, the use of a
Tellabs 9801 or 9802 Card Extender or an external
jackfield is strongly recommended to simplify align-
ment. The
6162B/C can also be aligned if mea-
surements are made at the numbered pins at the
rear
of the module's mounting position and care is
taken to
avoid double terminations. In some in-
stances, it may be necessary to remove some wire-
wrapping
connections at the module's mounting-
shelf connector before tone can be applied or
measured.
non-prescription alignment
3.16 Initial settings:
A. Ensure that all impedance options are properly
set.
B. Set ali positions of the front-panel xmt fac level,
xmt term loss, rcv fac level, and rcv term loss DIP
switches to the out position for no gain or loss.
DIP
switches to the out position for no gain or
loss.
C. Set all receive equalization DIP switches
(SLOPE, HT, and BW) to the out position for no
equalization.
D. Set all loopback-Ievel DIP switches to the up
position (6162A and 6162C only) for no loop-
back path gain or loss.
3.17
Receive-channel level adjustment:
A. Connect the receive portion (properly ter-
minated) of atransmission measuring
set (TMS)
to the 2W in jack. Request the distant location
to send 1004Hz at the level specified on the
CLR. Verify that tone is present and measure its
level.
B. Determine whether the measured level is
higher or lower than +7dBm.
1. If the measured level is lower than +7dBm,
set the front-panel rcv fac level gn/ls switch
to gn. Then set to IN the proper combination
of front-panel rcv fac level switches that
equals the required gain.
2. If the measured terminal-side level is higher
than +7dBm, set the front-panel rcv fac level
gn/ls switch to Is. Then set to IN the proper
combination of front-panel rcv fac level
switches that equals the required amount of
loss.
C. Refer to the CLR for the specified receive out-
put level.
D. Calculate the difference between this specified
output level and the internally derived +7dBm
level.
E. Set to in the proper combination of front-panel
rcv term loss DIP-switch positions that adds up
to this difference.
3.18
Transmit-channel level adjustment:
A. Remove the transmit speech path cut by seiz-
ing the
circuit from the terminal side.
B. Connect the transmit portion of the TMS (prop-
erly terminated)
to the 2W in jack. Send 1004Hz
from the terminal-side location at O.OdBmO.
practice section 816162/816162A/816162B/816162C
C. Connect the receive portion of the TMS (prop-
erly terminated)
to the 4W xmt out jack.
D. Set to IN the proper combination of xmt term
loss DIP-switch
positions so that a -16dBm
level is achieved.
E. Refer to the CLR for the specified level at the
distant end.
F. Request personnel at the distant end to
measure and report their receive level.
G. Calculate the difference between this specified
level and the measured level.
H. Determine whether the specified level is higher
or lower than the measured level.
1. If the specified level is lower, then set the
front-panel xmt fac level gn/ls switch to gn.
Then set to IN the proper combination of
front-panel
xmt fac level switches that
equals the calculated difference.
2. If the specified level is higher, then set the
front-panel xmt fac level gn/ls switch to Is.
Then set to IN the proper combination of
front-panel
xmt fac level switches that
equals the calculated difference.
receive-channel equalization alignment
3.1 9The receive-channel equalizer on the 6162X
is
functionally identical to the Western Electric
309B Prescription Equalizer. Prescription settings
for the equalizer can be found in BSP (Bell System
Practice)
section 332-912-232, and manual align-
ment procedures for the equalizer can be found in
BSP
section 332-912-234.
loopback level adjustment
3.20 To adjust the 6162X's loopback-Ievel-control
circuitry to provide equal-level loopback, proceed
as follows:
A. From the CLR, determine the specified transmit
input and receive output levels.
B. Subtract the receive output level from the
transmit input level. The result is the amount of
gain required in the loopback path.
C. On the 6162X's loopback subassembly, set to
on that combination of LPBK LVL DIP-switch
positions which most closely approximates the
amount of gain determined in step B.
4. circuit description
4.01 This circuit description is intended, to
familiarize you with the operation of the 6162X
4Wire-to-2Wire SF-to-E&M Terminal Repeater
modules. Attempts to troubleshoot these modules
internally are not recommended and may void your
warranty. Please refer to the 6162X block diagram,
section 5of this practice, as an aid in following this
circuit description.
receive path
4.02 A transformer at the 4wire receive input
port interfaces the transmission facility and derives
tip, ring, and
simplex leads. The transformer's
secondary windings are coupled to aresistive
switch-selectable 600- or 1200-ohm impedance-
matching network and to abuffer.
page 9

practice section 816162/816162A/816162B/816162C
4.03 Lightning protection is provided forthe buffer
by varistors. The output of the buffer is connected to
prescription rcv fac level circuitry for level coordina-
tion and thence to a series-connected active pres-
cription amplitude equalizer that is equivalent to the
Western Electric 309B Prescription Equalizer. The
output of the amplitude equalizer is connected to a
BEF band-elimination filter (BEF),which, at the appro-
priate time, filters out 2600Hz SF tone. The rcv term
loss
attenuating network provides the proper ter-
minal equipment levels without affecting the levels of
the signal that the SF detector receives. The conver-
sion from
4wire to 2wire transmission is achieved by
the integral magnetic hybrid, which drives the 2wire
port via
switch-selectable 600 or 1200-ohm imped-
ance-matching circuitry.
transmit path
4.04 Signals from the 2-coil hybrid drive abuffer,
which, in turn,
feeds the prescription xmt term loss
circuitry for terminal-side level coordination, after
which SF tones from the 2600Hz oscillator can be
inserted via the SF tone control circuit. The transmit
signal is then routed through the xmt fac level pre-
scription level-control circuitry for facility-side level
coordination and then is applied to adriver, which
is protected from lightning by varistors. The driver
drives
the 4wire transmit output port via switch-
selectable 600 or 1200-ohm impedance-matching
circuitry and via a transformer that derives tip, ring,
and
simplex leads.
terminal-side 2wire section
4.05 The 6167X uses atoll-grade magnetic hybrid
for
4wire-to-2wire conversion. An integral com-
promise balance
network (CBN) is connected to the
hybrid
to maximize transhybrid loss by simulating
600 or 900 ohm terminal-side (2wire) terminating
impedance and providing prescription build-out
capacitance. If desired,
the integral CBN can be
switched out of the circuit and an external PBI\J can
be
connected to pins 5and 15.
SF signaling
4.06 At the terminal end of the SF signaling path,
the E&M signaling interface circuit determines the
state of the local Mlead (A-side signaling) or Elead
(B-side signaling)
and communicates with the con-
trollogic to initiate proper transmit path cut and SF
tone transmission. The control logic circuit also
receives an
indication from the SF detector when
tone is received and causes the E&M signaling
interface to output the proper E-Iead or M-Iead
states.
Figures 11, 12, and 13 are function
sequence flowcharts that illustrate the signaling
operation of the 6162X with A-side signaling.
Horizontal
paths identify events occuring simulta-
neously,
and vertical paths denote sequential
events. Dotted lines indicate elapsed time.
loopback (6162A and 6162C only)
4.07 Both transmission loopback and signaling
loopback of the module are activated when the LB
relay operates. This relay is
controlled by the loop-
back detector and control circuit, which operates
the relay when anyone of the following happens:
A. A
2713Hz tone of correct level and duration is
detected in the receive path.
B. The external loopback lead (pin 18) is grounded
or connected to pin 37.
C. The ML DIP switch is closed.
4.08 In case A(tone loopback), loopback can be
deactivated by either asecond
2713Hz tone or by
automatic
timeout circuitry. In case B, if the external
loopback lead is grounded, the ground must be
removed
to deactivate loopback. In case C, if the ML
switch is closed, it must be opened again to deac-
tivate loopback.
4.09 When the
module is in loopback, the LB relay
contacts disconnect
the terminal-side port from the
6162X circuitry and connect the output of the
receive-path output driver to
the input of the transmit-
path buffer. Signaling loopback is such that SF
signals received at
the module are echoed back
onto the facility.
power supply
4.10 The power supply in the 6162X module is a
series-regulated bipolar supply that uses a zener
diode to derive a reference source. A diode in
series with the negative input lead protects against
reversed
voltage connections.
6. specifications
I transmission I
alignment level ranges, facility-side ports
4wire rcv port: -17 to + 7TLP (interface levels above
+7TLP not recommended)
4wire xmt port: -16 to +8TLP (interface levels below
-16TLP not recommended)
alignment level ranges, 2wire port
2wire-port input: +8 to -16TLP
2wire-port output: +7 to -17TLP
overload points
4wire rcv port: OdBmO
4wire xmt port: +3dBmO
2wire-port input: +3dBmO
2wire-port output: OdBmO
facility-side gain or loss (xmt and rcv)
o to 24dB of gain or 0 to 24dB of loss in switch-
selectable 0.1dB increments, with gain or loss
selected via switch option
terminal-side loss (xmt and rcv)
o to 24dB of loss in switch-selectable 0.1 dB
increments
receive-channel amplitude equalization
slope-type equalization for nonloaded cable or bump-
type equalization for loaded cable (functionally
equivalent to that provided by WECo 309B Prescrip-
tion Equalizer)
total harmonic distortion
less than 1% at overload point
receive-in-to-2wire frequency response re 1004Hz
(BEF removed)
300 to 500Hz +0.0, -1.7dB
500 to 3400Hz ± 1.0dB
specifications continued on page 15
page 10

practice section 816162/816162A/816162B/816162C
INCOMING CALL (A-SIDE SIGNALING)
RfMUVl
"" N,·'
~~
~
DIALING
I COMPI ETlL>
I I~
~-~
'8m>
I , .. 5('<' "MT
I PATH el"
,
'~
I
) 12"m,
: flEMOVF XMT
I PATHCUI
,
L------
r
--------------
~
[M()\n """
'" 'M;~;'" ,,,,
L-_--I. J""""" .. ""'0,"""""."
I "".,,,,,,, '''"''''''',''
NONSfN[)fRIHLJ
DIALING
-----------!
~
oc ..
... t[AIl
~ flN HOOK
~
'"'"'---- ~''"'- ----{]J"""
'CO
""
,lNO
ItU,ftllVfl
" IllN! I IN~,HT ~MT
PATH UiT
400m,
'''~\~':H ~
" '''Nf tll',m,
HFp~~~~~~'
~ ~
'--1;;;;'" "
~
'·~NlJ[ Hllf[)
(lIAIINt,
I ~:(~~~~SS
+
TO DISCONNECT SEQUENCE (figure 14)
figure 12. Function sequence flowchart, incoming call
page 11

-m
''"''
Illl
OFF
I ",eo" n,",,, """,""
L----------{3U
practice section 816162/816162A/816162B/816162C
OUTGOING CALL (A-SIDE SIGNALING)
I
I
I
I
I
I
I
I
I
I
I
1
I
I
I
I
I
I
I
I
I
______________ ---J
I DIS TAN I PARTY
.. ANSWE:~ ANSWER SUP, flVISHJN f'HOVIDI [)
f LEAD
OFF HOOK
~~
~I
E I fAD
l'''' HO<)~
I
I
t
TO DISCONNECT SEQUENCE (figure 14)
figure 13. Function sequence flowchart, outgoing call
page
12

practice section 816162/816162A/816162B/816162C
DISCONNECT SEQUENCE
I
PR~~~LE~~ I
DISTANT PARTY DISCONNECTS F!RST
LOCAL PARTY DISCONNECTS FIRST
INCOMING
C.ALL'
OUTGOING
CALL'
RECEIVING
Sf- TONE'
ANSWER
SUPERVISION
PROVIDED)
f DiSTANT PARTY
I DISCONNECTS
II
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I""'M"M'! I
PATH CUT
I I
1---------- ----~
II
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
J
ANSWER
SUPE RVISION
PROVIDED'
I
I
I
I
I
I
I
1------
I
"
INCOMINf;
sr LEVEl
3.1dBmO'
,S
SIGNAL TO
GUARD RA rio
10<iA'
CIRCUIT IDLE
"
INCOMING
SF LEVEL
))oBmO'
•
CIRCUIT IDLE
figure 14. Function sequence flowchart, disconnect
sequence for incoming and outgoing calls
page 13

,
W'
R
LJ
FRCILITY SIDE
'{:: ~;=: ~A ~I
TERMINRL SIDE
816162/816162A/816162B/816162C
UFTE'?I I
5. block diagram
[ 'MT 0--'1.( I
.:-.E
6162X 4Wire-to-2Wite SF-to-E&M Terminal Repeater modules
~ ~;;_~8,,--
I niiiii~ I
~SE
5 Jm
BRLANCE
,,'. n
~j[TW(lRK
1~~~~~~;
[,",,,, -., ·or· 'c
;,c~
s;,<C-( -------
_82-t'Tf--1
s';~ (
~r ~. I
"0: ~A~I
()
C\J
c.D
.....
c.D
.....
co
........
CD
C\J
c.D
.....
c.D
.....
CO
........
«
C\J
c.D
.....
c.D
.....
CO
........
C\J
c.D
.....
c.D
.....
CO
c::
o
".;:;
(.)
0,)
(/)
0,)
(.)
:;::
(.)
~
a.

2wire-to-transmit-out frequency response re 1004Hz
300 to 500Hz ± 1 .0dB
500 to 3400Hz ± 0.8dB
4wire terminating impedances
600 or 1200 ohms, balanced, individually
switch-selectable
2wire terminating impedances
600 or 900 ohms in series with 2.15[LF,
switch-selectable
insertion loss (600-ohm impedance at all ports)
o± 0.2dB at 1004Hz
internal noise
17dBrnCO maximum at maximum gain
longitudinal balance (all ports)
greater than 60dB, 200 to 3000Hz
echo return loss (4wire ports)
23dB minimum vs. 600 or 1200 ohms
echo return loss (2wire ports)
22dB minimum vs. 600 or 900 ohms +2.15[LF
crosstalk between adjacent modules in shelf
80dB minimum, 200 to 3400Hz
intrinsic transhybrid loss
35dB minimum
peak-to-average ratio (P/AR) (BEF removed)
98 minimum, without equalization
dc current capability of hybrid
40mA maximum
I SF transmit section I
internal SF tone oscillator frequency
2600 ± 5Hz for life of unit
SF tone levels
high (augmented) level: -8dBmO ± 1dB
low level: -20dBmO ± 1dB
SF tone states
idle: tone transmitted
busy: tone not transmitted
dialing: tone transmitted during the break portions of
dial pulses
high-level timing
high-level tone is transmitted for 400 ± 100ms
following each off-hook-to-on-hook transition of M
lead (A-side signaling) or E lead (B-side signaling)
M-Iead delay (A-side signaling) or E-Iead delay
(B-side signaling)
18 ± 5ms delay between M-Iead or E-Iead 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 and makes shorter than M-Iead or
E-Iead 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 makes of a duration between that of M-Iead
or E-Iead delay and 25ms are repeated as 25ms
silent (no tone) intervals
• input breaks longer than 50ms are transmitted as
tone bursts equal in duration to the input break
duration ± 2ms
• input makes longer than 25ms are repeated as
silent (no tone) intervals equal in duration to
the input make duration ±2ms
practice section 816162/816162A/816162B/816162C
transmit-path cut insertion
transmit speech path is cut (opened) 18 ± 5ms
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 detection
frequency: 2600±15Hz
range: 0 to -27dBmO
SF tone rejection threshold
-37dBmO
signal-to-guard ratio for signal detection
6 to 12dB
maximum line noise
51dBrnCO
guard circuit transition timing
high-to-Iow: 225 ± 60ms
low-to-high: 50 ± 10ms
band-elimination-filter timing
• insertion time: 13 ± 7ms
• insertion duration for SF tones shorter than 175 ±
60ms: 225 ± 50ms (with BEF insertion duration
longer than tone duration in all cases)
• insertion duration for SF tones longer than 175 ±
60ms: duration of SF tone plus 50 ± 10ms
dial pulse characteristics, SF to E lead (A side) or SF to
M lead (B side) for pulse rates of 8, 10, and 12pps
input break: 50% to 75%
output break: 58% ± 4%
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
I E&M signaling, A side I
E-Iead current rating
500mA maximum (resistor-capacitor contact
protection prOVided)
E-Iead resistance
less than 0.5 ohms
M-Iead sensitivity
-20Vdc minimum threshold; 500 ohms minimum
external M-Iead resistance from -48Vdc, will not
detect 20 kohms or greater external
M-Iead resistance
I E&M signaling, B side I
M-Iead current rating
500mA maximum (resistor-capacitor contact
protection provided)
M-Iead current from battery (Type I interface only)
100mA with less than 5-volt drop; current limiting
above 200mA
E-Iead sensitivity
500 ohms minimum external M-Iead resistance to
ground, will not detect 20kohms or greater external
E-Iead resistance
page 15

practice section 816162/816162A/816162B/816162C
I loopback (6162A and 6162C only)
tone-Ioopback frequency
2713Hz ± 7Hz
tone-Ioopback activation/deactivation level
-30 to -3dBm
tone-Ioopback activate time
2.5 seconds minimum (activates upon removal
of tone)
tone-Ioopback deactivate time
1.2 seconds minimum (deactivates immediately
thereafter)
automatic timeout (tone loopback only)
4 or 20 minutes, switch-selectable
tone loopback guard ratio
greater than G.OdB
loopback-path gain
-23 to +24dB in 1 dB increments
loopback level accuracy
± 0.5dB
I common specifications
input voltage
-42 to -54Vdc, filtered, positive-ground referenced
current requirements
6161 and 6161 B
condition
busy
idle
-4BVdc
75mA
60mA
~52Vdc
100mA
90mA
(max. output)
6161A and 6161C
condition
loopback busy (OdBm)
idle
-4BVdc
on B5mA
70mA
otf BOmA
65mA
-52Vdc
on
110mA
100mA
(max. output) off
105mA 95mA
operating environment
32° to 122°F (0° to 50"C), humidity to 95%
(no condensation)
dimensions
5.58 inches (14.2cm) high
1.42 inches (3.6cm) wide
5.96 inches (15.1 em) deep
weight
14 ounces (397 grams)
mounting
relay rack or apparatus case via one position of a
Tellabs Type 10 Mounting Shelf. Can also be
mounted in one position of a Tellabs 262U Universal
Network Terminating System Assembly or in one
position of a Tel/abs 260A Signaling and
Terminating System Assembly.
7. testing and troubleshooting
7.01 The troubleshooting guide in this section
may be used
to assist in the installation, testing, or
troubleshooting of any of the 6162X 4Wire-to-
2Wire SF-to-E&M Terminal Repeater modules. The
guide is intended as an aid in the localization of
trouble
to a specific module. Proper operation of
the module can be verified by observing its actual
operation
while referring to the function sequence
flowcharts (figures 11, 12, and 13). If a module is
suspected of being defective, a new one should be
substituted and the test conducted again. If the
substitute module operates correctly, the original
module should be
considered defective and re-
turned to Tellabs for repair or replacement as
directed below. We strongly recommend that no
internal (component-level) testing or repairs be
attempted on the 6162X module. Unauthorized
testing or repairs may void the module's warranty.
Also, if
the module is part of aregistered system,
unauthorized repairs will result in
noncompliance
with Part 68 of the FCC Rules and Regulations.
Note: Warranty service does not include removal of
permanent customer markings on the front of
Tellabs modules, although an attempt will be made
to do so. If a module must be marked defective, we
recommend that it be done on a piece of tape or on
aremovable stick-on label.
7.02 If a situation arises that is not covered in
the guide, contact Tellabs Customer Service as
follows (telephone
numbers are given below):
USA customers:
Contact Tellabs Customer Service
at your Tellabs Regional Office. Telephone
numbers are as follows:
US atlantic region: (203)
798-0506
US capital region: [phone]
US central region: [phone]
US southeast region: [phone]
US southwest region: [phone]
US western region: (702)
827-3400
Canadian customers: Contact Tellabs Customer
Service at our Canadian headquarters in Mis-
sissauga, Ontario. Telephone (416)
624-0052.
International customers: Contact your Tellabs dis-
tributor.
7.03 If a
module is diagnosed as defective,
follow
the replacement procedure in paragraph
7.04 when acritical service
outage exists (e.g.,
when asystem or acritical circuit is down and no
spares are available). If the situation is not critical,
follow
the repair and return. procedure in para-
graph 7.05.
replacement
7.04 To obtain a replacement module, notify
Tellabs via
letter or telephone (see addresses and
numbers below), or via TWX (910-695-3530 in the
USA, 610-492-4387 in Canada). Be sure to provide
all relevant information,
including the 8X6162X part
number that indicates the issue of the module in
•
•
•
page 16

question. Upon notification, we shall ship areplace-
ment module to you. If the module in question is in
warranty,
the replacement will be shipped at no
charge. Pack
the defective module in the replace-
ment module's carton, sign the packing slip
included with
the replacement, and enclose it with
the defective module (this is your return authoriza-
tion). Affix
the preaddressed label provided with the
replacement module to the carton being returned,
and ship
the module prepaid to Tellabs.
repair and return
7.05 Return the defective module, shipment pre-
paid, to Tellabs (attn: repair and return).
trouble condition
module completely
inoperative
cannot derive proper
transmission levels
E-Iead
or M-Iead LED
on when lead is idle
E-Iead or M-Iead LED
off when lead is busy
improper dial pulsing
loopback not activating
or not within O.5dB of
correct level
practice section 816162/816162A1816162B/8161621
in
the USA: Tellabs, Inc.
4951 Indiana Avenue
Lisle, Illinois
60532
telephone [phone]
in Canada: Tellabs Communications Canada, Ltd
1200 Aerowood Drive, Unit 39
Mississauga, Ontario, Canada L4W 2S
telephone [phone]
Enclose an explanation of the module's malfunl
tion. Follow
your company's standard procedur
with regard
to administrative paperwork. Tellat
will repair
the module and ship it back to you. If th
module is in warranty, no invoice will be issued.
troubleshooting guide
possible causes
1) No input power.
2) Improper wiring.
1) Front panel gn/Is switches improperly set.
2) Impedance option switches improperly set.
3) Receive equalization switches improperly set.
4)
TMS impedance improperly set or TMS not terminated.
5) Mlead
or Elead not seized.
1) Switch $11 improperly set.
2)
Inputs from near end or distant end not idle.
3) Fault in cable.
1) Switch $10 or $ 11 improperly set.
2)
Inputs from near end or distant end not busy.
3) Fault in cable.
1) Improperly set option switches.
2) Improper supply voltage (should be between -42 and -54Vdc).
3) Excessive cable leakage.
4) Excessive
longitudinal voltage on facility.
1) Switch $17 improperly set.
2) Transmit or receive path not properly aligned.
3) Incorrect level or frequency of incoming loopback tone.
page 17

il!itellabs
technical manual
76-A826162
rev A
addendum section A826162/826162A/826162B/826162C
©Tellabs, Inc., 1 November 1986
all rights reserved, printed in USA
Addendum: Issue 26162/X-Series
4Wire-to-2Wire SF-to-E&M Terminal Repeaters
figure 1. Issue 2 6162/X option switch locations
516
/2W IM~'t:lljlNCF
TOP VIEW
51
522
517
54
521
511
[]iIT]
B A
BonOM VIEW
510
I rn::::J I
1/111 II
82-61621X
INT 600 2 4 8 16 IN
m~~8B~t!
rJlT9D[)~)Jf/1000--'
---------'~CB~N~~=~~~~,---------j~
sections of nonloaded cable through the deliberate
impedance mismatch.
facility-side level adjustment information
for Issue 2 6162/X modules
1.04 When adjusting facility-side receive and
transmit transmission levels on the Issue 2 6162/X
modules, please disregard the information concern-
ing
the rev fae level gn/Is switch in paragraph 3.17,
step B, and the xmt fae level gn/Is switch in
paragraph 3.18,
step H, as well as the information
about these gn/Is switches in table 8. Instead, insert
facility-side gain
into the receive and transmit chan-
nels as follows:
•In
the receive channel, to obtain a +7dBm
transmission level, set to IN the proper combina-
tion
of front-panel rev fae gain dB-value DIP
switch positions.
•In
the transmit channel, to obtain the specified
transmit
output level, set to IN the proper com-
bination
of front-panel xmt fae gain dB-value DIP
switch positions.
receive-equalizer bypass switch
on Issue 2 6162/X modules
1.05 When setting switch options on the Issue 2
6162/X modules (see figure 1 of this addendum), be
certain
to set the receive-equalizer bypass switch
(IN/OUT position of the SLOPE DI Pswitch, S21) as
follows before adjusting
the equalizer:
•
To the IN position if the receive equalizer is to be
included in the circuit.
•
To the OUT position if the receive equalizer is to
be
excluded from the circuit, i.e., electrically
bypassed.
1.01 This addendum to practice section 816162/
816162A/816162B/816162C, revision A(dated 1
May 1985), covers changes to the 6162, 6162A,
6162B, and
6162C 4Wire-to-2Wire SF-to-E&M Ter-
minal
Repeater modules resulting in the Issue 2
versions of
these modules (Tellabs part numbers
826162, 826162A, 8261628, and 826162C).
These modules differ from their Issue 1 counter-
parts as follows:
• At the facility-side ports (receive input and
transmit output), a
switch-selectable choice of
1200,600, or 150-ohm terminating impedance is
now available at each port. (The Issue 1 modules
offered 1200 or 600 ohms only.)
•
In both the receive and transmit channels, the
front-panel facility-side level switches offer gain
only (instead
of the gain or loss available on the
Issue 1modules). These switches are relabeled
rev fae gain and xmt fae gain to reflect this
change in function.
• A bypass
option (IN/OUT position on SLOPE DIP
switch, S21) allows
the receive-channel equalizer
on the Issue 2 modules to be electrically
bypassed,
i.e., excluded from the circuit.
• A facility-side simplex-lead
pinout has been
added
so that the receive input simplex (RCV IN
SX) lead appears on pins 9 and 11. (The RCV IN
SX lead
appeared only on pin 9on the Issue 1
modules.)
•Power-cross
protection has been added for all tip
and ring leads.
• A
power LED has been added to the front panel.
1.02
In the event that this addendum section is
revised,
the reason for reissue will be stated in this
paragraph.
facility-side impedance optioning information
for Issue 2 6162/X modules
1.03 When optioning the Issue 2 6162/X mod-
ules, please disregard figure 10 and the terminating-
impedance optioning information in paragraph 3.07
and table 6
of the attached practice. Instead, refer
to figure 1 of this addendum and set the RCV IMPD
and XMT IMPD positions of S1 as follows:
•For
1200 ohms (150 and 600 positions of RCV
IMPD and XMT IMPD toward 1200) to interface
loaded cable.
•For
600 ohms (150 position of RCV IMPD and
XMT IMPD toward 1200, and 600 position of RCV
IMPD and XMT IMPD toward 600) to interface
nonloaded cable
or carrier.
•For
150 ohms (150 position of RCV IMPD and
XMT IMPD toward 150, and 600 position of RCV
IMPD and XMT IMPD toward 1200) to provide a
small
amount of amplitude equalization for long