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The BRI network processor module must have a dedicated S-bus connection for each of its ISDN
ports. The BRI module cannot share any of its S-bus connections with other terminal equipment,
therefore, no other terminals should be connected to the same S-bus as a BRI module connection.
The four or eight ISDN connections must be made to network connection points that are provided
by one network vendor or public telecom operator (PTO) to ensure that common network timing
exists between the ISDN ports used. Failure to observe this point may result in lost (nonrecoverable)
data packets due to timing slips.
The BRI network processor module is fully transportable between compatible host chassis. The
choice of each compatible chassis has no effect on the capabilities, functionality, or performance of
the BRI network processor module.
The BRI network processor module consists of the following subassemblies:
•
•
•
The BRI network processor module provides users of compatible host routers or bridge chassis with
a high-speed throughput, point-to-point connection that can be set up over the digital
telecommunication network ISDN.
Installation Requirements (Special Considerations)
Read the following sections before connecting the BRI port of your router to a network.
ISDN, Type of Connection
Where your PTO has provided you with ISDN modular sockets, the BRI module can be plugged in
to make the connection. Connections should only be made to a BRI module properly installed within
the host chassis.
Warning
Damage to the equipment and injury to the user could occur.
In certain countries, the BRI network processor module must be hardwired permanently to the
S-reference connection point (your Cisco Systems dealer will advise). This is accommodated for by
the use of a connect one-time-only, nonremovable plug (RJ-45 with the latch tab removed).
ISDN Connection, Safety Warning
The ISDN connection is regarded as a source of voltage that should be inaccessible to user contact.
No attempt should be made by users to tamper with or open any PTO-provided equipment or
connection hardware. Any hardwired connection (other than by a nonremovable, connect
one-time-only plug) must be made only by PTO staff or suitably trained engineers.
The BRI network processor module (four or eight port options) is approved only for installation in
a host chassis and with host attachments, which are either type approved for such apparatus, or
covered by a General Approval.
BRI network processor module mother card (part number 73-1219)
1 or 2 BRI adapter interface cards (part number 73-1220)
BRI-ISDN (point-to-point use) Software Version 1.0
The BRI module must not be connected to the ISDN while removed from its host chassis.
Making Network Connections
Installing the Router 3-9
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