Installation manual

COMSPHERE 3000 Series Carrier
4-2 March 2001 3000-A2-GA31-F0
Mixing Devices in a Carrier Half
When devices are mixed, such as DSUs with dial/lease
modems, it is recommended that they be clustered
together in a carrier half. A carrier half is either Slots 1–8
or Slots 9–16. From the front of the carrier, install
dial/lease modems starting with Slot 1.
If you populate the same
carrier half with all . . .
Then use a . . .
Dial/lease modems, DSUs, and
DSUs with ISDN, 2-wire switched
56 kbps, or V.32 analog DBM
Permissive DDD
NIM.
DSUs with programmable V.32
analog DBM
Programmable
DDD NIM.
DSUs with 4-wire switched 56 kbps
backup capability
4-wire switched
56 kbps NIM.
Triple-modem circuit cards 24-port interface
connector and
24-port NIM.
T1 CSU and T1 DSU/CSU T1 auxiliary
backplane.
NOTE
Dial/lease modems which use
the 24-port NIM must not be
installed with DSUs in the same
half of the carrier.
Network Cables
Table 4-1 shows the network cables available.
Figure 4-1 illustrates several network cabling connections.
Network cables are used for NIM connections, network
connections (P21 and P22), and the T1 auxiliary
backplane network connections. The straight-in network
interface cable is recommended as no cable tie wrap is
required. When using the right-angle cable, use the tie
wrap as shown below.
The T1 auxiliary backplane network cable is attached
with a T1 network cable retainer. Refer to the Installing
the T1 Network Cable Retainer section of Chapter 3 for
details.
Table 4-1
Network Cabling Connectors
Straight-in Network
Cable
Right-angle Network
Cable
10′ – Feature 3000-F1-013 10′ – Feature 4400-F1-501
30′ – Feature 3000-F1-014 30′ – Feature 4400-F1-504
496-14905
Right-Angle
Network Interface
Cable with
Tie Wrap