Nortel Networks NN43001-563 User Manual

Page 187

Channel Identifier planning

187

Unit number (from TN)

ISL Channel number

Two cards, sequential numbering, gap left for expansion

This example is for two ITG-Pentium 24-port trunk cards. To allow room for
replacement by a Media Card 32-port trunk card at a later date, a gap of
eight channels has been left between the cards.

Table 41 "Mapping of unit number to ISL Channel number – two cards in
system and expansion gap" (page 187)

maps the unit number to the ISL

channel number for a two ITG-Pentium 24-port trunk cards with an eight
channel gap between cards. Nortel recommends this configuration as it
makes it easy to replace an ITG-Pentium 24-port trunk card with a Media
Card 32-port trunk card, without affecting the other card.

If no gap is left in the numbering sequence between the cards, conversion
to a Media Card 32-port trunk becomes difficult. The ISL channel numbers
on the first card have no room to expand, making it necessary to fully
re-provision the second IP trunk card.

Table 41
Mapping of unit number to ISL Channel number, two cards in system and
expansion gap

Unit number (from TN)

ISL Channel number

Card 1

Nortel Communication Server 1000

IP Trunk Fundamentals

NN43001-563

01.01

Standard

Release 5.0

30 May 2007