ADTRAN D4-U-RPM User Manual
PRACTICES
MODEL U-RPM
D4-U-RPM
U-REPEATER POWERING MODULE
INSTALLATION/MAINTENANCE
Contents
Paragraph Page
1. General ............................................................1
Figure 1. ADTRAN D4 U-RPM ......................................... 1
2. Installation.......................................................2
Figure 2. U-RPM Application........................................... 2
Table A. U-RPM Option Selections................................. 2
3. Connections.................................................... 2
Figure 3. Connector Pin Assignments........................... 3
Figure 4. U-RPM Option Locations................................. 3
C A U T I O N
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Section 61100022L1-5
SECTION 61100022L1-5
Issue 3, April 1992
CLEI Code # DDRPG701_ _
4. Maintenance.................................................... 3
5. Warranty And Customer Service .................. 3
1.0 GENERAL
1.01 This section provides installation and
maintenance
information for the ADTRAN U-Repeater
Powering Module (U-RPM), Part Number: 1100022L1.
Figure 1 shows the front of the unit. Figure 2 represents
a generic module application. Figure 3 shows the
connector pin assignments for the U-RPM. The unit's
part number and basic features are:
Part
Equipment Number Features
U-Repeater 1100022L1 Repeater Powering for
Powering ADTRAN ISDN mid-point loop
Module repeater; Loop resistance fault
(U-RPM) indicator; Class A2 or Class A3
operation.
FIGURE 1. ADTRAN D4 U-RPM
1.03 The U-RPM is a channel plug-in used in the
ADTRAN GPC-1 or AD4-24 Shelves or the
WECO® D4 channel bank, to provide sealing current
power for the ADTRAN ISDN mid-point loop repeater.
1.04 The U-RPM provides three functions for the
ADTRAN ISDN mid-point loop repeater. These
functions are:
1. The D4-U-RPM receives -48 VDC power
from the facility power source and sends
constant 85 mA of sealing current down
the loop to power the U-Repeater.
2. A passive customer data flow is allowed
through the D4-U-RPM.
1.02 This practice has been reissued to reflect the
addition of a field selectable powering option in
Paragraph 2.04 and Figure 4 and the latest CLEI
designation. Issue 3 adds a new Sales telephone number.
®
WECO is a registered trademark of AT&T Technologies
61100.022L1-5C
3. The D4-U-RPM monitors the line for
excessive resistance or open conditions.
PAGE 1
SECTION 61100022L1-5
T
R
MODULE
GND
D4
POWER
U-RPM
85 mA
CURRENT
SOURCE
(1)
-48
-
(43)
-48 RET
LT
U
INTERFACE
MAIN
DISTRIBUTION
FRAME
MDF
(24)
(51)
CENTRAL
OFFICE
FIGURE 2. U-Repeater Powering Module Application
2.0 INSTALLATION
2.01 After unpacking the unit, immediately inspect it
for possible shipping damage. If damage is
discovered, file a claim immediately with the carrier, and
then contact ADTRAN customer service, see Paragraph
5.03.
(20)
T1
(47)
+
R1
(15)
To LT
12,000 ft., 26 Gauge
ISDN
U-REPEATER
REPEATER
POWER
CONVERTER
TO
CUSTOMER
12,000 Ft.
26 Gauge
bank in the event of unit failure.
2.05 After installing the U-Repeater System, see
ADTRAN's
Practice, Section Number, 61150.017-5
U-Repeater Installation/Maintenance
. Grasp the URPM by its faceplate and insert it into a channel position.
Push the U-RPM into the backplane connector until
firmly seated.
2.02 The U-RPM plugs directly into any of the 12
channelpositions of the GPC-1 or the 24 channel
positions of the AD4-24 or WECO D4 Channel Bank.
NOTE: When installed in D4-type compatible channel
banks, the unit dissipates approximately 3 W.
2.03 The U-RPM contains installed option jumpers
for Class A2 (± 80 V) or may be optioned for
Class A3 (0 V to -140 V) operation, using the 22 AWG
jumpers provided with the unit, ADTRAN Part Number:
3336.008.
See Figure 4 for option locations and Table A
for the option settings. The Loop Resistance Fault
indicator illuminates when loop resistance exceeds 1000
Ω or if the loop is open to the Repeater.
2.04 The U-RPM contains a factory replaceable
(3/4 A) Slo Blo fuse on the -48 V line to isolate the
3.0 CONNECTIONS
3.01 Figure 3 shows the connector pin assignments
of the U-RPM. All connections to the unit are
made via the GPC or D4 compatible backplane. No
additional backplane wiring is necessary for normal
Class of Operation Voltages Used Jumper(s) Installed
Class A2 ± 80 V J1 only
Class A3 0 V to -140 V J2 & J3 only
TABLE A. U-RPM Option Selections
PAGE 2
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