Tellabs 6008C User manual

6008C DX-to-E&M Signaling Converter
Subassembly
•-rtellabs
technical manual
76-816008C
rev B 08/87
Please Note: The 6008C subassembly can be
optionally installed (by the customer or the fac-
tory) on
the Tellabs 6132 2Wire-to-4Wire or 4Wire-
to-4Wire Terminal Interface Module as well as on
the 6131 module. When installed on a6132, the
6008C and its host module are referred to, and
can be ordered as, the 6132C.
practice section 816008C
©Tellabs, Inc., 2 November 1985
all rights reserved, printed in USA
1. general description
1.01 The 6008C OX-to-E&M Signaling Converter
plug-on subassembly (figure 1) provides bidirec-
tional conversion
between OX (duplex) signaling,
which is
extended-range E&M signaling over OX
signaling leads (see note), and the type of E&M
signaling used
by a carrier channel (or aPBX). An
electronic OX signaling unit, the 6008C operates
end-to-end either with conventional relay-type OX
signaling units or with electronic OX units. The
6008C is designed for optional use on the Tellabs
6131
2Wire-to-4Wire or 4Wire-to-4Wire Terminal
Interface Module.
Note: In 2wire applications, the leads used for OX
signaling are A and Bleads. In 4wire applications,
the leads used
for OX signaling are simplex (SX)
leads.
1.02 This
practice section is revised to update the
text portion of section 7.
1.03 Functions, features, and options of the
6008C include the following:
•
Switch-selectable OX1 or OX2 signaling.
•Switch-selectable Type
I, II, or III E&M interface.
•Integral
OX balance network that provides from 0
to 6750 ohms of switch-selectable resistance
and from 0
to 7J.-tF of switch-selectable
capacitance.
•Switch-selectable 0
or 4fLF midpoint capacitance
for the OX signaling leads.
•Maximum signaling
and supervisory range of
5000 ohms for the external OX loop.
1.04 The 6131
module on which the 6008C is
used provides transmission
interface between a
2wire or 4wire facility and a 4wire E&M trunk. Along
with switch-selectable
2wire or 4wire facility-side
interface,
transformer coupling is provided at all
ports of the 6131, and prescription bidirectional
level control (loss only in FCC-registered applica-
tions, gain
or loss in non-registered applications) is
also available on
the module. Thus, in the 2wire-to-
4wire mode, the 6131 functions as ahybrid ter-
minating
set with pads (registered) or as a 2wire-to-
4wire repeater (non-registered). In the 4wire-to-
4wire mode, the 6131 functions as a pad/trans-
former module (registered) or as a 4wire-to-4wire
•
•
contents
section 1general description
section 2application
section 3installation
section 4
circuit description
section 5
block diagram
section 6
specifications
section 7testing and troubleshooting
page 1
page 2
page 3
page 6
page 7
page 6
page 8
page 1
figure
1. 6008C DX-to-E&M Signaling Converter
subassembly
repeater (non-registered). When the 6008C is
installed on
the 6131, the resulting module-sub-
assembly combination is referred to as a6131C.
The 6008C subassembly makes physical and elec-
trical
connection to its host 6131 via two 15-pin
male
connectors on the 6008C and corresponding
female
connectors on the printed board of the 6131.
Note: While the 6008C subassembly and the 6131
module can be ordered separately, the 6131 can
also be
ordered with the 6008C factory-installed on
the module.
To do this, simply specify the 6131C
module on the order.
1.05 With
the 6008C subassembly installed, the
host 6131 can be switch-optioned for either of three
facility-side signaling-lead arrangements:
•Bypass: In the bypass mode, the 6008C sub-
assembly is electrically bypassed so that no
signaling conversion takes place.
• Normal: In the normal mode with 2wire facility
interface selected, the 6131's Alead is associ-
ated with
the 2wire tip lead, and the Blead is
associated with
the 2wire ring lead. In the normal
mode with 4wire facility interface selected, the
6131's receive output SX lead is associated with
the 4wire receive output pair, and the transmit
input SX lead is associated with the 4wire
transmit input pair.
•Reverse: In the reverse mode with 2wire facility
interface selected, the 6131's Alead is associ-
ated with
the 2wire ring lead, and the Blead is
associated
with the 2wire tip lead. In the reverse

l
, ,
, , E
:>--<:(E )(
,,
I I
-t-~ i ,
, 1
21 '>--<'
M' ,
, I
II
_ 1 I
- , I
BOOBC ,I PBX trunk circuit
figure 2b. DX2 signaling, TL31E or TC31E
-4BV
the 600BC in these two signaling modes is as
follows:
•
In OX1 operation, the 600BC accepts local
(terminal-side) M-Iead inputs and derives
the
appropriate OX current for transmission to the
distant (facility-side) location. Also in OX1 opera-
tion,
the 600BC derives local E-Iead output states
in response
to OX current received from the dis-
tant location.
•
In OX2 operation, the 600BC accepts local E-Iead
inputs and derives the appropriate OX current for
transmission to the distant location. Also in OX2
operation, the
600BC derives local M-Iead output
states in response to OX current received from
the distant location.
OX signaling loop limits
2.03 For proper OX signaling operation, total
resistance of
the OX signaling loop between the
600BC and the OX unit at the distant facility-side
location must
not exceed 5000 ohms. In 2wire
applications, total
OX signaling-loop resistance is
simply
the resistance of the metallic loop between
the two OX signaling units. In 4wire applications,
where signaling
takes place over the SX leads of
the
transmit input and receive output pairs, total OX
signaling loop resistance equals one half of the
loop resistance
of the transmit input pair plus one
half of
the loop resistance of the receive output pair.
E&M interface
2.04 With either OX1 or OX2 operation selected,
the 600BC can be switch-optioned for Type I or
Type II E&M interface. In OX1 operation only, the
600BC is compatible with aType III E&M interface
when
optioned for Type I. Figures 2through 4 show
the various E&M interfaces available with OX1 and
OX2 operation. Registered Facility Interface Codes
are also provided
where applicable (i.e., for all inter-
faces exceptType III with OX1).
-4BV
,,
EI ,
)( 2i ):>--<:
,,
,,
i i~-4BV
I ,
,,
, I
! n~:;~L£'~n ~ ,>--<'
~M': : M
,,
I, _
BOOBC : : PBX trunk cirCUit
figure 2a. DX1 signaling, TL31M or TC31M
1
figure 2. Type IE&M interface arrangements
practice section B1600BC
mode with
4wire facility interface selected, the
6131's receive output SX lead is associated with
the
4wire transmit input pair, and the transmit
input SX lead is associated with
the 4wire
receive output pair.
1.06
Input power is supplied to the 600BC sub-
assembly via
the host 6131 module. Integral voltage
regulators on the
600BC and the 6131 allow the
6131C
to operate on filtered, ground-referenced
-42 to -56Vdc input. Maximum current required by
the
600BC and its host 6131 together is 110mA
plus
OX sending current.
1.07 As
stated above, the 600BC plugs onto the
printed circuit board
of its host 6131, aType 10
module. The resulting 6131C, in turn, plugs into
one
position of aTellabs Type 10 Mounting Shelf, ver-
sions of
which are available for relay-rack and
apparatus-case installation. In relay-rack applica-
tions,
up to 12 modules can be mounted across a
19-inch rack,
while up to 14 modules can be moun-
ted across a
23-inch rack. In either case, 6 inches of
vertical rack space is used.
page 2
2. application
2.01 The 600BC OX-to-E&M Signaling Converter
subassembly, when installed on its host 6131
2Wire/4Wire-to-4Wire Terminal Interface Module,
interfaces a
2wire or 4wire facility that uses OX
signaling with a 4wire E&M trunk that normally
interfaces a carrier channel. When the host 6131
module is
optioned for 2wire facility interface,
signaling is derived via
the module's Aand 8leads.
When the 6131 is
optioned for 4wire facility inter-
face, signaling is derived via the module's receive
output SX and transmit input SX leads.
OX1 /OX2 signaling
2.02 The 600BC can be switch-optioned for a
OX1 or OX2 signaling arrangement. Operation of

practice section 816008C
::-t'
~-4BV
~M-LEAD h
M !ETECTOR -=
,
,
,
r PBX trunk circuit
,
:>--<
,
,
,---_-;.19~\ , >--<
J: SG 7
-c::::
BOOBC
-48V-48V
~
figure 3a. DX1 signaling, TL32M or TC32M figure 3b. DX2 signaling, TL32E or TC32E
figure 3. Type
1/ E&M interface arrangements
figure 4. DX1 signaling, Type 1/1 E&M interface
arrangement
2.07 The amount of resistance required in the
balance network is simply the total resistance of the
external OX signaling link. This is because a1210-
ohm resistive
component integral to the 6008C's
balance network automatically compensates for the
resistance of the OX unit associated with the ter-
minal
equipment at the opposite end of the OX
signaling link. The five KILOHMS positions of the
6008C's OX-balance-network DIP switch introduce
from 0 to 6750 ohms of resistance, in 250-ohm
increments, to permit matching (within 125 ohms) of
OX-link resistance up to 5000 ohms.
2.08
No specific formula exists for calculating the
amount of capacitance required to properly balance
the circuit. This amount depends upon a variety of
factors. For example, little capacitive balance is
required in
most 4wire OX circuits because the
signaling pairs are separated by substantial relative
distances and are therefore coupled by very little
mutual capacitance. Numerous other factors,
including cable gauge and splicing format, also
affect the OX signaling link. The cumulative effect of
these factors makes prediction of the required
amount of balancing capacitance difficult. Atrial-
and-error procedure is therefore necessary to
achieve proper capacitive balance. The three [LF
positions of the 6008C's OX-balance-network DIP
switch allow from 0 to 7 [LF of capacitance to be
introduced into the circuit in 1[LF increments.
3. installation
inspection
3.01 The 6008C OX-to-E&M Signaling Converter
subassembly should be visually inspected upon
arrival
to find possible damage incurred during ship-
ment. If
damage is noted, aclaim should immedi-
ately be filed with the carrier. If stored, the
subassembly should be visually inspected again
prior to installation.
page 3
-4BV
>--<~3G
>--<, MM
>--<; SB
,
,
,
,
,PBX trunk circuit
,
>--<'
,
BOOBC :
E
q )( ::
SG
-4BV~
signaling-lead midpoint capacitance
2.05 To prevent unwanted signaling-state
changes toward the facility-side termination, a
switch option on
the 6008C allows 4[LF of capaci-
tance to be placed across the midpoint of the
6008C's OX signaling leads. This midpoint capaci-
tance must be provided in all 2wire applications.
Normally, it is also provided in all
4wire applications
except those involving an unusually short OX
signaling link. In short-link applications, the mid-
point
capacitor is switch-optioned out of the circuit
for O[LF of midpoint capacitance, which allows
easier
alignment of the 6008C's integral OX
balance network than would otherwise be possible
with a
short OX link.
OX balancing
2.06 Aresistive and capacitive OX balance net-
work in the 6008C is used to balance the module's
internal OX impedance against that of the external
OX signaling link. Proper OX balance ensures
optimum performance of the 6008C's OX unit for
the specific length (in ohms) of the OX signaling link
and also minimizes pulse distortion.
~
-

figure 5. 6008C option and alignment switch locations
section of the 6008C's integral OX balance network
may not be possible. Paragraphs 3.10 and 3.11 pro-
vide
appropriate non-prescription alignment pro-
cedures for the resistive and capacitive sections of
the OX balance network.
non-prescription optioning
3.05 If prescription option-switch settings are not
available for the 6008C, set its three option
switches as directed below.
Note: If the Registered Facility Interface Code is
known for a particular application, the 6008C's two
signaling-related option switches (S10 and S13) can
be set as indicated in table 2.
3.06 DX1 or DX2 Operation. Two-position slide
switch 813 selects either DX1 or DX2 operation for
the 6008C. Set 813 as follows:
•For
DX1 operation (receiving M-lead signals from
and
sending E-Iead signals toward E&M terminal
equipment),
set 813 to OX1.
•For DX2 operation (receiving E-lead signals from
and sending M-Iead signals toward E&M terminal
equipment),
set 813 to OX2.
3.07 E&M Signaling Interface. Two-position
slide switch
810 selects Type I, II, or III E&M inter-
face
for the 6008C. Set 810 as follows:
•
To 1/1/1 for Type IE&M interface.
•
To /I for Type II E&M interface.
•
To 1/1/1 for Type III E&M interface (available only
when 813 is set to DX1).
3.08 Signaling-Lead Midpoint Capacitance.
The MPC position of nine-position DIP switch 815
(the
rightmost switch position) allows either 4,uF or
O,uF of midpoint capacitance to be placed across the
6008C's DX signaling leads. Set the MPC switch as
follows:
•
In all 2wire applications, and in all 4wire appli-
cations except those involving an unusually
short DX signaling link, set the MPC switch to IN
to provide 4,uF of midpoint capacitance.
[ E LED
[ M LED
81-6008C
513
o~L
P1
[
P2
[
510
~
1I111
practice section 816008C
mounting and connections
3.02 The 6008C subassembly makes physical
and electrical
connection to its host 6131 module
via two 15-pin male connectors, P1 and P2, located
on the subassembly's
component side. To install the
6008C on the host 6131, proceed as follows:
A. Remove the small plastic filler panel at the
upper righthand corner of the 6131's front panel
by pushing it
outward from the rear of the panel.
B. Orient the 6008C subassembly so that male
connector P1 on the 6008C lines up with
female
connector J1 on the 6131, male connec-
tor P2 on the 6008C lines up with female con-
nector J2 on the 6131, and the small plastic
panel labeled Cand
containing the E and M
LED's on
the 6008C lines up with the opening
at the upper righthand corner of the 6131's front
panel adjacent to the 6131 model number.
C. Carefully plug the 6008C onto the host 6131,
ensuring that all
connector pins on the 6008C
fit properly into their receptacles on the 6131's
female
connectors and also ensuring that the
small plastic panel labeled Con the 6008C fits
properly
into the opening in the 6131's front
panel.
D. Finally, install and tighten the screws (supplied)
that
secure the 6008C's four standoff posts to
the 6131's printed circuit board.
options and alignment
3.03 Before the 6008C is placed into service,
three option
switches on the subassembly must be
set and the subassembly's integral DX balance net-
work (also switch-controlled) must be aligned. Two
of
the option switches are two-position slide
switches,
while the third is one position of anine-
position DlPswitch. The remaining
eight positions
of the DIP switch control the DX balance network.
Figure 5
shows the locations of these switches on
the subassembly's printed circuit board. In addition
to the 6008C's SWitches, several option and align-
ment switches on the host 6131 must be set as
well.
Instructions for setting the 6131's switches are
provided in
the Tellabs 6131 practice, while instruc-
tions for setting the 6008C's switches are provided
below.
prescription optioning and alignment
3.04 For prescription optioning and alignment of
the 6008C (see notes below), required switch set-
tings should be
determined from circuit records
prior
to installation of the 6131 C. These required
settings should then be noted in the checklist
column of table 1 or on the circuit layout record
(CLR). During installation, the
6008C can be quickly
and easily optioned without referring to the detailed
instructions in the text. Simply refer to the check-
list column of table 1(or to the CLR) and set all
switches as indicated.
Note 1: A similar table and checklist are proVided in
the Tel/abs 6131 practice for prescription optioning
and alignment of the host 6131 module.
Note 2: For reasons stated in paragraph 2.08 of this
practice, prescription alignment of the capacitive
page 4

table 2. Registered Facility Interface Codes and required signaling options
table 1. Summary and checklist of 6008e option and alignment switches
practice section 816008C
Total resistance added is the sum of those
KILOHMS switches set toward their respective
values, i.e., toward .25, .5, 1, 2, and 3 and away from
KILOHMS. Please note that a 1210-ohm resistive
component integral to the resistive section auto-
matically compensates for the internal resistance of
the OX unit at the terminal-equipment end of the OX
link. Thus, the required balance-network resistance
is simply the total resistance of the OX signaling
link. Determine this resistance and set the balance-
network KILOHMS switches as follows:
• For 2wire applications, the required balance-
network resistance equals the resistance of the
2wire metallic loop between the 6008C and the
terminal-end DX unit. Set toward their respective
values those KILOHMS switches whose sum
matches this amount as closely as possible.
page 5
Registered Facility E&M signaling OX signaling 6008C option
Interface Code interface arrangement switch settings*
510 513
TL31 M or TC31 M
Type I
OX1
1/111 OX1
TL31 E or TC31 E
Type I OX2 1/111 OX2
TL32M or TC32M Type II
OX1
II
OX1
TL32E orTC32E
Type II OX2 II
OX2
not applicable Type III
OX1
1/111
OX1
* See table 1and/or text for information on non-signaling-related 6008C options.
switch option
switch
selection
setting
checklist
OX1 * or OX2**
S13
OX1 operation*
OX1
operation OX2 operation **
OX2
Type I, II, or III S10
Type Iinterface
1/111
E&M interface
Type II interface
II
Type III interface 1/111
(available only with S13
set to DX1)
signaling-lead
S15,
4,uF
IN
midpoint capacitance (4,uF)
MPC position OftF
OUT
OX balance network
S15 (BAL), 250
ohms toward .25
resistance
KILOHMS
500 ohms toward .5
(0 to 6750 ohms)*** positions 1000
ohms toward 1
only*** 2000
ohms
toward 2
3000 ohms toward 3
OX balance network
S15 (BAL), 1,uF
toward 1
capacitance ftF positions
2,uF toward 2
(0 to 7,uF)*** only***
4,uF
toward 4
*
In OX1 operation, the 6008C accepts M-Iead inputs for OX transmission to the remote site and derives E-Iead outputs
from OX signals received from the remote site.
** In OX2 operation, the 6008C accepts E-Iead inputs for OX transmission to the remote site and derives M-Iead outputs
from OX signals received from the remote site.
***
The OX balance network's resistance and capacitance switch positions on OIP switch S15 are cumulative. Total resis-
tance and capacitance introduced is the sum of those KILOHMS and ,uF switch positions set toward their respective
I
values.
•In 4wire applications where the OX signaling link
is unusually short, set the MPC switch to OUT for
no midpoint capacitance.
OX balance network alignment
3.09 The 6008C's integral resistive and capaci-
tive OX balance network allows the subassembly's
internal OX impedance to be balanced against that
of the external OX signaling loop. Align the resistive
and capacitive sections of the balance network as
directed below.
3.10
Resistive Section. The five KILOHMS
switches on nine-position DIP switch S15 control
the resistive section of the balance network. These
switches introduce from 0 to 6750 ohms of resis-
tance, in 250-ohm increments, to match (within 125
ohms) external loop resistance of up to 5000 ohms.
-
~

practice section 816008C
•For 4wire applications, the required balance-
network resistance equals one half the sum of
the resistance of the metallic transmit and
receive pairs
between the 6008C and the
terminal-end OX unit. Set toward their respective
values
those KILOHMS switches whose sum
matches
this amount as closely as possible.
3.11 Capacitive Section. The three }-IF switches
on nine-position DIP switch S15 control the capaci-
tive section of
the balance network. These switches
provide from 0
to 7}.LF of capacitance in 1}.LF
increments. Total capacitance provided is the sum
of those }.LF switches set toward their respective
values,
i.e., toward 1, 2, and 4and away from }.LF. For
reasons covered in paragraph 2.08, the
proper
amount of capacitive balance required for apar-
ticular circuit is difficult to predict. Therefore, this
amount must normally be determined by atrial-and-
error procedure as follows:
A. Ensure that the circuit is idle. (An incoming idle
indication from the
distant-end OX unit must be
present.)
B. Arrange the transmit portion of apulsing test
set (PTS) to transmit dc dial pulses at approx-
imately 10
pulses per second (pps) and 58 per-
cent break.
C. Connect the transmit portion of the PTS to the
6131C's Mlead (OX1 operation) or Elead (OX2
operation).
O. Connect the receive portion of the PTS to the
6131C's Elead
(OX1 operation) or Mlead (OX2
operation).
E. If the receive portion of the PTS indicates no
dial pulsing, no balance-network capacitance ;s
required. If, however, dial pulsing is observed,
add
capacitance via the }.LF/1000 switches on
S15 until the Elead (OX1 operation) or Mlead
(OX2 operation)
goes idle.
potential
differences in the first lead, thus compen-
sating
for ground-potential or battery-supply varia-
tions. Additionally, the
circuit is balanced against
longitudinal ac line voltages and currents.
4.03 The
6008C uses an active OX signaling unit
that derives local signaling from currents transmit-
ted over derived metallic simplex leads. The OX
bridge circuit is abalanced bridge-type detector
that senses differential voltage changes across four
400-ohm resistors that replace the four windings of
the OX relay used in conventional relay-type OX
sets. The differential voltage changes are sensed
and
directly coupled to an integral dial-pulse com-
pensator. The
compensator introduces aslight
delay
so that the 6008C ignores spurious signals.
Also, to minimize dial-pulse distortion, the
compen-
sator adjusts for nonsymmetrical switching of the
E&M signaling relay. An E&M signaling relay (K1)
provides the local E-lead output (in the OX1 mode)
or the local M-lead output (in the OX2 mode). The
E&M signaling relay (K1) is operated during busy
and
not operated during idle. Resistor-capacitor
contact protection is provided for the relay contacts.
Front-panel E-lead and M-Iead busy-indicating
LED's provide avisible indication
of the status of
the
6008C's E&M signaling interface.
4.04 At
the local end of the OX signaling path, the
E&M signaling interface circuit determines the state
of
the local Mlead (OX1 mode) or Elead (OX2
mode) and
operates an active bidirectional driver,
which provides the current changes in the OX loop
toward
the distant location.
4.05 An active series
regulator integral to the
6008C supplies power to the subassembly's circuits
from
-42 to -56Vdc input. The 6008C's series
regulator uses a zener diode for establishing the
relay supply and series-pass transistor
for voltage
limiting.
4. circuit description
4.01 This circuit description is intended to famil- 6. specifications
lanze you with the 6008C OX-to-E&M Signaling I I
Converter subassembly for engineering and appli- OX signaling
cation purposes only. Attempts to troubleshoot the OX loop resistance
6008C internally are not recommended. Trouble- 5000 ohms maximum
shooting
procedures should be limited to those pre- dial-pulsing rate dial-pulse distortion
scribed in section 7of this practice. Refer to the 7.5 to 12.5pps 3percent maximum
section 5
block diagram of this practice as an aid balance network
in understanding the circuit description. resistallce: 0 to 6750 ohms in switch-selectable
250-ohm
increments
4.02 Both ends of a OX signaling circuit are
balanced symmetrical
circuits connected by two c~~~~~~~~~~ 0 to 7flF in switch-selectable 1flF
metallic conductors. One lead in the OX signaling
path carries
supervisory and pulsing signals con- midpoint capacitance
4,uF or OflF, switch-selectable
sisting
of combinations of local ground and battery.
Differences in
ground or battery potentials between [E&M signaling, OX1 mode
each end of the OX signaling circuit create non- E-Iead current rating
supervisory currents in this signaling lead. The 500mA maximum (resistor-capacitor contact protec-
second lead in the OX circuit acts as areference for tion provided)
these differences in end-office potentials. The OX E-Iead resistance
signaling unit is arranged so that the unbalance less than 0.5 ohm
created in the second lead is equal and opposite to M-Iead sensitivity
that created in the first lead. The current in the -20Vdc minimum threshold; 500 ohms external
second lead cancels the effect of these unwanted M-Iead resistance from -48Vdc
page 6

816008C
• -j SXR
DX SIDE
4j.JF
r
IN
I MPC { OUT
~SXT
OX
REFERENCE
which, in turn, plugs into one position of a Tellabs
Type 10 Mounting Shelf (relay-rack- or apparatus-
case-configured)
2wire-port echo return loss
20dB ERL minimum vs. 600 or 900 ohms in series
with 2.15f..lF, without current limiting
25dB ERL minimum vs. 600 or 900 ohms in series
with 2.15f..lF, with current limiting
transhybrid loss
25dB ERL minimum with precision termination of
600 ohms plus 2.15f..lF
insertion loss
0.3dB nominal at 1000Hz and 600 ohms
nominal frequency response (re 1000Hz)
receive path, 2wire facility interface:
300 to 1000Hz: -1.5, +1.0dB
1000 to 4000Hz: -1.5, +1.0dB
receive path, 4wire facility interface:
300 to 1000Hz: -0.8, +0.2dB
1000 to 4000Hz: -0.8, +0.5dB
transmit path, 2wire facility interface:
300 to 1000Hz: -1.5, +1.0dB
1000 to 4000Hz: -1.5, +1.0dB
transmit path, 4wire facility interface:
300 to 1000Hz: -0.8, +O.2dB
1000 to 4000Hz: -0.5, +0.5dB
transmission specifications affected by
6008C
E&M
SIGNALING
RELAY
CONTROL LOGIC
5. block diagram
~~
[] [0
DIAL-PULSE I
ox
COMPENSATOR
DRIVER
-
I'''~
"---
VI
3kfl r~
6008C DX-to-E&M Signaling Converter subassembly
weight
5 ounces (142 grams),
not including host
6131 module
E&M
SIGNALING
INTERFACE
.JJ 1/111
SlOcY'" 011 • ~I
OXl
S13~OX2
ACTIVE
BIDIRECTIONAL
DRIVER
E~
Mf--
SBf-
SG f-
SERIES
REGULATOR
GNO f- I 2kfl ~ 2 "
rl--J
lkfl
4- 2 '" O'5kflij~ 5
1 1 0 25kfl .25
4-)JF t 2)JF Il)JFT "
~ SAL)JF ~ LSAL KILOHMS -~
E&M SIDE
-4-8Vdc f-------
practice section 816008C
page 7
[ E&M signaling, DX2 mode I
M-Iead current rating
500mA maximum (resistor-capacitor protection
provided)
M-Iead current from battery (Type IE&M interface only)
100mA with less than 5V drop; current limiting
above 200mA
E-Iead sensitivity
5000 ohms maximum external E-Iead resistance to
ground
I general I
input power requirements
voltage: -42 to -56Vdc, filtered, earth-ground-
referenced (supplied via host 6131 module)
current: 110mA maximum, including host 6131
module but not including loop current
dc earth potential difference ac induction
greater than ± 45Vdc greater than 35Vrms
operating environment
32 to 122'F (0 to 50'C), humidity to 95% (no
condensation)
dimensions
5.25 inches (13.35cm) high
1.14 inches (2.90cm) wide
5.20 inches (13.21cm) deep
mounting
plugs onto printed circuit board of a Tellabs 6131
2Wire/4Wire-to-4Wire Terminal Interface Module,
~
~

practice section 816008C
page 8
technical assistance via telephone
7.02 If asituation arises that is not covered in the
troubleshooting guide, contact Tellabs Customer
Service as follows:
USA customers: Contact your Tellabs Regional
Office listed below.
in the USA:
Tellabs, Inc.
4951 Indiana Avenue
Lisle, Illinois
60532
telephone [phone]
text continued on next page
product return procedure (for repair)
7.04 To return equipment for repair, first contact
Tellabs Product Services (see addresses and num-
bers below)
to obtain aMaterial Return Authoriza-
tion (MRA). Aservice representative will request
key data (your company's name and address, the
equipment's model and issue numbers and warranty
date code, and the purchase order number for the
repair transaction). The service representative will
then give you an MRA
number that identifies your
particular transaction. After you obtain the MRA
number, send
the equipment prepaid to Tellabs
(attn: Product Services).
in Canada:
Tellabs Communications Canada, Ltd.
1200 Aerowood Drive, Unit 39
Mississauga, Ontario, Canada L4W 2S7
telephone [phone]
Enclose an explanation of the malfunction, your
company's name and address, the name of aper-
son
to contact for further information, and the
purchase order number for the transaction. Be sure
to write the MRA number clearly on the outside of
the carton being returned. Tellabs will inspect,
repair, and retest
the equipment so that it meets its
original
performance specifications and then ship
the equipment back to you. If the equipment is in
warranty,
no invoice will be issued. Should you need
to
contact Tellabs regarding the status of arepair,
call or write the Product Services department at
our
Lisle or Mississauga headquarters as directed above.
product replacement procedure
7.05 For critical service outages, Tellabs offers a
choice of two replacement services (if the product
is in
replacement stock) in lieu of the 15-day repair
and return service
described above. These are
overnight express service (at extra cost) any-
where in
the USA and five-day expedited delivery
(at no extra cost) anywhere in the USA and Canada.
To obtain replacement equipment via either of
these services,
contact your Tellabs Regional Office
in
the USA or our Canadian headquarters in Missis-
sauga, Ontario,
for details, costs (if applicable), and
instructions. Telephone numbers are given in
paragraph 7.02. Aservice representative will request
key
data (your company's name and address, the
equipment's model and issue numbers and warranty
date code, and
the purchase order number for the
replacement transaction). Tellabs will then ship the
replacement to you in accordance with the replace-
ment
service you request. An invoice in the amount
office location
Danbury, CT
Washington, DC
Chicago,IL
Orlando, FL
Dallas, TX
Orange County, CA
telephone
[phone]
[phone]
[phone]
[phone]
[phone]
[phone]
region
US Atlantic
US Capital
US Central
US
Southeast
US Southwest
US Western
7. testing and troubleshooting
7.01 The troubleshooting guide in this section
may be used to assist in the installation, testing, or
troubleshooting of the 6008C DX-to-E&M Signaling
Converter subassembly. The guide is intended as
an aid in
the localization of trouble to this specific
equipment. If the equipment is suspected of being
defective,
substitute new equipment (if possible)
and
conduct the test again. If the substitute
operates correctly, the original should be con-
sidered defective and returned to Tellabs for repair
or replacement as directed below. We strongly
recommend that no internal (component-level) test-
ing
or repairs be attempted on the equipment.
Unauthorized testing or repairs may void its
warranty. Also, if
the equipment is part of aregis-
tered system, unauthorized repairs will result in
noncompliance with Parts 15 and/or 68 of the FCC
Rules and Regulations.
Note: Although repair service always includes an
attempt to remove any permanent markings made
by customers on Tellabs equipment, the success of
such attempts cannot be guaranteed. Therefore, if
equipment must be marked defective or bad, we
recommend that it be done on a piece of tape or on
aremovable stick-on label.
Canadian customers: Contact our Canadian
headquarters in Mississauga, Ontario. Telephone
[phone].
International customers: Contact your Tellabs
distributor.
selecting correct product service procedure
7.03 If equipment is diagnosed as defective or if
in-service
equipment needs repair, follow the prod-
uct return procedure in paragraph 7.04 in all
cases except those where acritical service outage
exists (e.g., where asystem or acritical circuit is
down and no spares are available). In critical
situations,
or if you wish to return equipment for
reasons
other than repair, follow the product
replacement procedure in paragraph 7.05.