Nortel Networks Circuit Card 311 - Manual (Page 962)

962 NTBK22 MISP card
Note: When configuring BRI trunks, the MISP (NTBK22) card must be
co-located in the same Media Gateway as the SILC (NT6D70) and UILC
(NT6D71) cards the MISP is supporting.
Refer to ISDN Basic Rate Interface: Installation and Configuration
(NN43001-318) and ISDN Basic Rate Interface: Features (NN43001-580)
for additional information.
The MISP occupies one slot in the Media Gateway. It uses one of the
network loops to interface with SILCs and UILCs and to provide 32 timeslots
for D-channel signaling and packet data transmission. The other loop
address is used to communicate with the Call Server.
The MISP is supported only in the Media Gateway. It is not supported in the
Media Gateway Expansion. It can be inserted into slots 1, 2, 3, and 4 of
the Media Gateway.
Note: When configuring BRI trunks, the MISP (NTBK22) card must be
co-located in the same Media Gateway as the SILC (NT6D70) and UILC
(NT6D71 cards the MISP is supporting
Refer to ISDN Basic Rate Interface: Maintenance (NN43001-718) and ISDN
Basic Rate Interface: Features (NN43001-580) for additional information.
Functional description
Each MISP can support 4 line cards (UILC or SILC or any combination of
the two). Each line card supports 8 DSLs, therefore each MISP supports
32 DSLs. Since each DSL uses two B-channels and one D-channel the
MISP supports 64 B-channels and 32 D-channels. If the MISP is carrying
packet data, it must dedicate one of its D-channels to communicate with the
external packet handler. In this case the MISP supports only 31 DSLs.
The main functions of the MISP are:
• communicate with the Call Server CPU to report ISDN BRI status and
receive downloaded application software and configuration parameters
• manage Layer 2 and Layer 3 signaling that controls call connection
and terminal identification
• control terminal initialization and addressing
• assign B-channels for switched voice and data transmission by
communicating with the BRI terminal over the D-channel and allocating
to it an idle B-channel with appropriate bearer capabilities
• separate D-channel data from signaling information and route the data
to the packet handler
• send call control messages to ISDN BRI terminals over the D-channel
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
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