Alcatel MainStreet 2902, Руководство пользователя

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23 — Cross-connecting circuits
2902 MainStreet Technical Practices 23-3
May 2002 90-2906-01
Drop traffic goes to the devices connected to the drop and insert node; insert traffic
comes from the devices connected to the node. Drop and insert traffic between Nodes
A and B cross-connect through P2; traffic between Nodes C and B cross-connect
through P1.
Figure 23-1 Drop and insert configuration
Bypass configuration
A node is considered to be a bypass node when there is no traffic between its primary
rate modules and its data modules. All primary rate traffic received on one primary
rate module is passed to the other primary rate module. A node can be configured for
bypass operation by cross-connecting circuits between the two primary rate modules.
Procedure 23-1 To cross-connect simple circuits
CONFIG — CONNECT — <P
p
-
c
> or <
pp
-
c
> ↵ — TO_CIRCUIT— <
pp
-
c
> or <P
p
-
c
> ↵
where p is 1 or 2, pp is 1 or 9, and c is 1 to 31 (for primary rate), or 1, 2, A or B (for interface
module)
If the circuit is already connected, a warning appears on the screen.
2902 MainStreet
Network Terminating Unit
Power
Event Status
System Status
Processor
Out of Sync 1
Out of Sync 2
Data circuit
Node B
2902 MainStreet
Node A Node C
8870
P1 P2
Note —
If a 2902 MainStreet node loses power and there are two
E1 G.703 LIMs installed, all connections are dropped and the node
automatically operates as a bypass node. If one or both LIMs are
E1 HDSL or E1 Optical LIMs, the node does not operate in bypass
mode because E1 HDSL and E1 Optical LIMs do not have on-board
bypass relays.