Nortel Networks NN43001-563 Twocards, sequential numbering, gap left for expansion

Channel Identifier planning 187
Twocards, sequential numbering, gap left for expansion
This example is for twoITG-Pentium 24-port trunk cards. Toallow 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.
Table41 "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 betweenthe 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 4 1
Mapping of unit number to ISL Channel number,two cards in system and
expansion gap
Unit number (from TN) ISL Channel number
Card 1
01
12
23
34
45
56
67
78
89
910
10 11
11 12
12 13
13 14
14 15
15 16
16 17
17 18
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.