Avaya Nortel Communication Server 1000 Manual page 63
Ip line fundamentals
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Also See for Nortel Communication Server 1000:
- Reference (700 pages) ,
- Configuration manual (350 pages) ,
- Hardware installation and maintenance (262 pages)
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Scenario
Primary Call Server failure (WAN geographically
redundant system)
•
A call is established between IP Phones A and
B that are registered with the primary site in the
geographically redundant system.
•
The primary site fails.
•
The IP Phones are re-registered with the
secondary site. IP Phone A re-registers first.
Virtual Office logon failure (scenario 1)
•
IP Phone A logs into IP Phone C and
establishes a call with IP Phone B. All three
IP Phones are registered with the same Call
Server.
•
TLAN subnet failure occurs. IP Phone A goes
offline first, then IP Phone B.
•
Active IP Phones A and B re-register with the
system when the TLAN subnet comes back
up. IP Phone A re-registers first and then IP
Phone B.
Virtual Office logon failure (scenario 2):
•
IP Phone A logs into IP Phone C and
establishes a call with IP Phone B. All three
IP Phones are registered with the same Call
Server.
•
TLAN subnet failure occurs. IP Phone B goes
offline first, then IP Phone A.
Copyright © 2003–2008, Nortel Networks
.
Result
The call is not lost.
IP Phones can be configured in 2 ways:
1. Site 1 is the secondary site and Site 2 is
2. IP Phones have Site 1 defined as the
The call is not lost.
The following ACF transitions occur:
NO ACF -> PARTIAL REBUILT -> IDLE ->
HALF REBUILT -> REBUILT
The call is not lost.
The following ACF transitions occur: NO ACF
-> HALF REGISTERED -> IDLE -> HALF
REBUILT -> REBUILT
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Active Call Failover for IP Phones 63
not configured.
In this case the scenario is the same
as main office failure for branch office
(scenario 1): the HALF REBUILT->
REBUILT transition.
primary site while Site 2 is defined as the
secondary site. Registration by Site 1 fails.
In this case, the secondary site Call Server
does not have the RLM entries for the
re-registering IP Phones and the scenario
is the same as main office failure for
branch office (scenario 2): the PARTIAL
REBUILT -> REBUILT transition.
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