Nortel Networks NN43001-563 User Manual
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System description
IP address when the Active Leader goes out-of-service. The term Active
Leader indicates the Leader 0 or the Leader 1 card that is performing the
Active Leader role.
Leader 0 or Leader 1 can have Active Leader status. On system power-up,
Leader 0 normally functions as the Active Leader and Leader 1 as the
Backup Leader. At other times, the Leader card functions reverse, with
Leader 1 working as the Active Leader and Leader 0 working as the Backup
Leader.
The Leader, Backup Leader, Follower, and DCHIP cards communicate
through their ELAN network interfaces. For more information, see
Protocols and ports used by IP Trunk 3.01 (and later)" (page 131)
Follower
A Follower card is a Media Card 32-port trunk card and/or an ITG-Pentium
24-port trunk card which converts telephone signals into data packets and
data packets into telephone signals. For outgoing calls, Follower cards
provide dialed number-to-IP address translation.
Active Leader
The Active Leader card is an IP trunk card that acts as a point of contact for
all other Meridian 1/CS 1000 systems in the network.
The Active Leader card is responsible for the following:
•
distributing incoming H.323 calls to each registered Follower card in
its node and balancing load among the registered cards for incoming
IP calls
•
IP addresses for other cards in its node (see
•
serving as a time server for all IP trunk cards in its node
•
performing network monitoring for outgoing calls in its node
•
voice processing
All calls from a remote VoIP gateway node are first presented to the Active
Leader card. The Leader card maintains a resource table of all the IP trunk
cards in its node. The Active Leader card consults its internal IP trunk card
resource table to determine which card has the most idle channels and is
the least busy. Based on that information, the Active Leader card selects
the card to receive the new call.
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563
01.01
Standard
Release 5.0
30 May 2007
Copyright © 2007, Nortel Networks
.