Installation manual

COMSPHERE 3000 Series Carrier
4-6 March 2001 3000-A2-GA31-F0
NIM Installation
To install the NIM providing the dial interface for the
DBMs, dial/lease modems, or the switched 56 kbps
network interface for the ISDN, 2-wire, or 4-wire
switched 56 kbps DBM:
" Procedure
1. Start with Slots 1–8.
2. Seat the NIM on connectors P23 and P24 on the
rear of the carrier (Figure 4-2).
3. Use the four screws provided with the module to
secure it to the carrier.
4. Connect a 50-pin mass termination line cable to
the module. Secure the cable with the cable tie that
is provided.
5. Choose one of the following:
If you
have a . . .
Then connect the
line side of the
cable to the . . .
Dial interface Dial circuit terminations
assigned to the DBMs and
dial/lease modems in
carrier Slots 1–8.
Switched 56 kbps
network interface
for 2-wire
switched 56 kbps,
ISDN or analog
2-wire switched 56 kbps
circuit terminations
assigned to the switched
56 kbps DBM in carrier
Slots 1–8.
NIM with two
6-position Service
Line modular
connectors for
dial/lease
modems
Proper dial line or NIM
modular connector. The
modular plugs are labeled
1–8, and correspond to the
devices in carrier slot
positions.
6. To install the NIM for any DSUs, DBMs, or
dial/lease modems to be installed in Slots 9–16,
repeat Steps 1 through 5. Seat the NIM on
connectors P25 and P26 on the rear of the carrier.
496-13589-05
P26 P25 P24 P23
P20 P19
J2 P22 J1 P21
Network
Interface
Module
(NIM)
To P23
or P25
To P24
or P26
Figure 4-2. Network Interface Module Installation