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Installation
3-433000-A2-GA31-80 December 1994
Depending upon your configuration, use one of the
following interconnection schemes for a dial/dial backup
interface (Figure 3-28): the 50-pin cable can be attached
to a 66A-punchdown block. With this scheme, all dial
circuits must be hard-wired to the block. Note that the
connection type is defined by the NIM installed in that
half of the carrier.
• The 50-pin cable can be used to connect a
permissive DBM NIM to a 3600-F2-505 adapter
cable. This arrangement is only used for DSU/DBM
devices in the Permissive mode.
• The 50-pin cable can be used to connect a
programmable DDD NIM to a 3600-F2-504 adapter
cable. This requires that all devices in one half of
the carrier be configured as programmable
connections to the dial lines.
• The 50-pin cable can be used to connect a
programmable DBM NIM to a 3600-F2-504
adapter cable. This arrangement is only used for
DSU/DBM devices in the Programmable mode.
• The 50-pin cable can be plugged directly into an
RJ21X (permissive) or RJ27X (programmable) dial
network interface arrangement provided by the dial
service provider. Only the first eight lines are wired
in each 50-pin connector.
2-Wire Switched 56 kbps Network Interface
The 2-wire switched 56 kbps digital network interface
is provided by an optional 2-wire Switched 56 Network
Interface Module (NIM), which has a 50-pin connector,
on the back of the carrier. Appendix A provides the pin
assignments for this connector.
Depending upon your configuration, use one of the
following interconnection schemes available for a 2-wire
switched 56 kbps backup interface (Figure 3-29):
• The 50-pin cable from a permissive NIM can be
attached to a 66A-punchdown block. With this
scheme, the circuits must be hard-wired to the
block. Note that the connection type is defined by
the NIM installed in that half of the carrier.
• The 50-pin cable from a permissive NIM can be
connected to a 3600-F2-505 adapter cable.
NOTE
Do not insert a 2-wire switched
56 kbps plug into an RJ11C jack.
This type of jack is intended for
analog PSTN devices. Plugging
into an RJ11C plug may cause
equipment damage and harm to
the telephone network.
4-Wire Switched 56 kbps Network Interface
The 4-wire switched 56 kbps digital network interface
is provided by an optional 4-wire Switched 56 Network
Interface Module (NIM), which has an SJA57-type
connector, on the back of the carrier. Appendix A
provides the pin assignments for this connector.
Depending upon your configuration, use one of the
following interconnection schemes available for a 4-wire
switched 56 kbps backup interface (Figure 3-30):
• The 50-pin cable can be attached to a
66A-punchdown block. With this scheme, the
circuits must be hard-wired to the block. Note that
the connection type is defined by the NIM installed
in that half of the carrier.
• The 50-pin cable can be plugged into a
3600-F2-503 adapter cable. This cable provides 8
keyed modular connectors using Pins 1, 2, 7, and 8.
These connect the DSU to a standard DDS network
interface and also provide the 4-wire switched
56 kbps digital service connection for the
DSU/4-wire Switched 56 DBM.