Nortel 1000 Description, Installation And Operation Manual page 143

6 Gatekeeper-routed calls create a higher load on the card.
7 The values in the tables are valid for all Voice codecs and voice sample
size including G.711, 10 ms voice sample.
Nortel Networks recommends that traffic on a single card ITG-Pentium
24-port trunk card node never exceed the following:
• 5000 calls/hour – Gatekeeper-routed
• 6000 calls/hour – non-Gatekeeper-routed
In a multi-card node, the various roles necessary in processing calls, such as
Leader card, DCHIP card, and Follower card, can be divided over multiple
cards. This ensures that no IP trunk card exceeds its real-time capacity.
The maximum number of cards one DCHIP card can support is limited by the
restriction of 382 TIE trunks for one D-Channel. Therefore, only 12 Media
Cards 32-port or 16 ITG-Pentium 24-port trunk cards can be supported by one
DCHIP card.
Nortel Networks recommends a node never exceed the ratio of 12
Media Card 32-port trunk cards or 16 ITG-Pentium 24-port trunk cards
to one Leader card.
A node has only one Leader card; however, more then one DCHIP card can
be provisioned. If a DCHIP card fails, all IP trunk cards with channels that
use that D-channel are out of service; the remaining IP trunk card channels,
though, do remain in service. This configuration provides some redundancy
and less work for each DCHIP card.
ITG engineering guidelines
Recommendation
IP Trunk Description, Installation, and Operation
Page 143 of 644