Nortel 1000 Fundamentals page 67

System, platform, or application
M1/CS 1000 Systems
CS 1000M SG (CP PIV)
CS 1000M MG (CP3/4)
CS 1000M MG (CP PIV)
CS 1000E
MG 1000B
Capacity
For more information relating to the Telephony Gateway and Services and
Remote Call Control components, see
Redundancy
Office Communications Server 2007 redundancy model is supported, with
limitations, using Load Balancers.
NRS redundancy NRS redundancy is similar to Converged Office
redundancy; a heartbeat mechanism between MCM 3.0 and NRS servers
is implemented. When a heartbeat failure from the primary NRS server is
detected, all messages are redirected to the secondary NRS server.
SIP routing
MCM directs calls from an Office Communicator user to the CS 1000
connected to their twinned telephone. A user can have a telephone number
in Active Directory associated with their account as depicted in
"SIP Routing" (page
to any endpoint (Public or Private) are directed to their CS 1000. The CS
1000 tandems the call to the other CS 1000 (if necessary).
SIP routing ensures the following:
•
•
In Figure 22 "SIP Routing" (page 68)
6-441-5431 (AC1-LOC-DN). The From header in the INVITE has David's
Line URI in the format of E.164;ext=2313051. The MCM gets the extension
number 2313051 and uses the NRS to find the CS 1000 associated with the
number 231-3052 and directs the call. This CS 1000 directs the call to the
CS 1000 that has the destination number of 441-5431, which then directs
the call to the appropriate end user device.
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
Copyright © 2005–2008, Nortel Networks
.
68), the number is 231-3052. Calls made from a user
Outgoing Office Communicator calls made by a twinned client can be
tracked by Call Detail Recordings (CDR).
Calls from an Office Communicator to incompatible systems can be
made.
Nortel Communication Server 1000
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
Telephony Gateway and Services planning 67
Supported
Yes
Yes
Yes
Yes
Yes
"Capacity planning" (page
the user david@ocsserver.com calls
46).
Figure 22