Nortel SMC 2450, Руководство по внедрению

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Page 50 of 260 Description
553-3001-225 Standard 1.00 May 2006
Campus redundancy
The Nortel Communications Server (CS) 1000E system is a highly-scalable
and robust IP PBX that offers support of IP-based applications using
industry-standard interfaces, while providing an industry-leading set of
telephony features and applications.
Using the campus redundancy feature, you can separate the CS 1000E Call
Servers in a campus environment for "campus mirroring". This feature
connects two Call Servers, one active and one redundant, through an Ethernet
network interface. Call processing is switched over gracefully between the
two CPUs without interrupting ongoing calls and registered IP phones.
To help eliminate any potential system down time, configure a pair of
CS 1000E CPUs to form a completely redundant IP telephony network. You
can install the following equipment as redundant systems:
• signaling servers
• TLAN and layer two switches
• layer three routers
Before placing an SMC system into a campus redundancy environment,
consider that a minimum alternation of the existing data/voice network must
not degrade the existing VoIP functionalities and must fully comply with the
existing redundant network layout with SMC High Availability (HA)
support.
SMC deployment with campus redundancy
Figure 7 on page 51 illustrates the general location of the SMCs in a campus
redundant environment. The two SMCs form a high availability cluster,
consisting of an active and a backup device. Graceful switch over of the
CS1000E is fully supported.