Nortel Networks 1000S User Manual

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 Configuration options
Note: You can configure the network for redundancy.
The single campus deployment example consists of the following:
Call  Server 
Signaling Server (optionally redundant)
up to four Media Gateways and four Media Gateway Expanders:
— can be configured to provide network redundancy
— provide a global suite of telephony trunks 
analog telephones (service for 2500 series telephones and fax)
digital telephones (service for Meridian 3900 telephones)
a switched Ethernet infrastructure
up to 1000 IP Phones 
centralized management capability
other telephony applications