Installation manual

COMSPHERE 3000 Series Carrier
4-4 March 2001 3000-A2-GA31-F0
Use the following procedure for digital network or
analog leased-line interface installation.
" Procedure
To install in . . .
You . . .
The U.S. DDS
network
Connect the network cables,
feature 3600-F2-503 (50-pin
mass termination line cable),
to the carrier.
Canada DDS
network
Use the provided special
network interface adapter
cable, feature 3000-F1-009.
1. Use a small screwdriver to tighten the screw.
2. Attach a cable tie to the cable near the hood of the
carrier’s cable-tie attachment point. If a
“straight-in” cable is used, disconnect the cable
tie, remove the screw and cable tie mount, and
fasten the cable with two screws.
3. Connect the individual cables with 8-pin modular
plugs into the adapter for each DDS line.
Network Interface Module
(NIM) Connectors
NIMs are installed over the connectors labeled P23 and
P24 (right side) or P25 and P26 (left side). The NIMs
provide the interfaces for dial backup modules and
dial/lease modems to the following:
• Dial network (PSTN)
• ISDN network
• 2-wire or 4-wire switched 56 kbps digital service
NIMs have the following characteristics:
• Two different NIMs can be mounted onto the
carrier and be independent of one another.
• Each NIM serves eight contiguous slots in the
carrier:
— One NIM for Slots 1–8 and
— One NIM for Slots 9–16
• Each NIM determines the operating characteristics
of the interfaces to the eight slots it serves.
Dial Network Interface
Two optional NIMs on the back of the carrier both
provide the direct distance dialing (DDD) network
interface.
Depending upon your configuration, use one of the
following for a dial/dial backup interface:
• An RJ21X (permissive) 50-pin connector, or
• An RJ27X (programmable) 50-pin connector
The two NIMs can be different types and operate
independently of one another. Appendix A provides pin
assignments. Additional features available for both
programmable and permissive NIMs are:
• Service Line. Permits an extra dial line to be
connected to the carrier. NIMs with this feature
have two Service Line modular connectors, which
can be used in sharing a single dial line between:
— Two halves of the carrier (Slots 1–8 and
Slots 9–16) and
— Multiple carriers.
• Make Busy.
Check that the dial/lease modem’s leased-line
connection occurred on the proper pins. If not, a
cross-connection may be required at the network
interface.
If a 50-pin cable is
attached to a . . .
Then . . .
66A punchdown block Hardwire the circuits to
the block.*
Permissive DDM NIM to
connect to an adapter cable,
feature 3600-F2-505
Install only DSU/DBM
devices in the Permissive
mode in that half.
Programmable NIM to
connect to an DDD adapter
cable, feature 3600-F2-504
Configure all devices to
the dial lines as a
programmable
connection in that half.
Programmable NIM to
connect to a DDD adapter
cable, feature 3600-F2-504
Install only DSU/DBM
devices in the
Programmable mode.
RJ21X (permissive) or
RJ27X (programmable) dial
network interface
arrangement provided by the
dial service provider
Verify that the first eight
lines are wired in each
50-pin connector.
* The connection type is defined by the NIM installed in
that half of the carrier.