Paradyne Comsphere 3510 User Manual page 50

COMSPHERE 3500 Series Data Service Units
Connecting to the Digital Network
The installed DSU is connected to the digital network
through the 50-pin connectors on the rear of the carrier.
These interfaces are specified in USOC RJ48T (pin
assignments are shown in Appendix
connection to the DDS facility or a network channel
terminating equipment must be made at the far end of the
cable.
To ensure proper network connection to the DDS
facility or to network channel terminating equipment:
"
Procedure
1. If the network line and remote DSU are installed
and tested, perform a Remote Loopback – Test
Pattern Test (Point-to-Point or Multipoint).
2. If the Front Panel test switches strap is to be
disabled, slide the DSU slightly out of the carrier,
open Switch S3-1, then reseat the DSU into the
carrier. Do this now.
3. Write circuit ID information in the area provided
on the cover plate under the appropriate slot
number.
The Model 3511 DSU and rear connector plate initial
installation procedure is completed.
Installing a Model 3511 DSU
Before installing the DSU, whether being returned to
service or following repair, verify strap settings and make
adjustments that may be necessary.
To install a Model 3511 DSU after an initial
installation:
"
Procedure
1. Using a Phillips screwdriver, loosen the screw
holding the circuit pack lock, and rotate the lock
to the open position
2. At the front of the carrier, hold the DSU vertically
with the latch on its faceplate in the open position.
Insert the circuit card into the top and bottom
circuit card guides.
4-10
A). Proper network
(Figure 4-4). Open the latch.
3. Aligning the circuit card with the rear connector
plate, slide the DSU into the slot until the
connectors seat firmly into the back of the carrier.
4. Press the faceplate latch to secure the DSU in the
carrier, rotate the circuit pack lock into the closed
position, and tighten the screw.
If the carrier is powered, all indicators on the
faceplate flash as the DSU performs an internal
power-on self-test. The green OK indicator then
lights for about 20 seconds, then the red OS/NS
flashes. If no indicators light, verify that the DSU
is receiving power.
Installation of the carrier-mounted Model 3511 DSU is
complete.
Removing a Model 3511 DSU
To remove a Model 3511 DSU:
"
Procedure
1. Using a Phillips screwdriver, loosen the screw
holding the circuit pack lock, and rotate the lock
to the open position
2. Pull the latch out and down on the lower edge of
the faceplate until the DSU starts to slide out. Pull
the DSU free of the mounting.
3. If the DSU is to be removed from service, place
the DSU in a protective ESD bag before storing.
If the DSU is defective and needs repair, place the
DSU in a protective ESD bag, record the defect on
a tag, and attach it to the bag. Return the DSU to
the company per instructions included in the
Equipment Warranty and Support
Chapter 1.
Removal of the Model 3511 DSU is complete.
July 1999
(Figure 4-4). Open the latch.
section of
3510-A2-GN32-70