Functional Components

The Avaya IG550 Integrated Gateway consists of the following VoIP modules that can be installed in the PCI Express slots on the J4350 and J6350 Services Routers for providing VoIP connectivity:

• TGM550—Avaya Telephony Gateway Module (TGM) with two analog telephone ports, two analog trunk ports, and one serial port for console access.
• TIM510—Avaya DS1 Telephony Interface Module (TIM) with one T1 or E1 trunk port.
• TIM514—Avaya Analog TIM with four analog telephone ports and four analog trunk ports.
• TIM521— Avaya BRI TIM with four RJ-45 ports for ISDN BRI trunk connections.

The TGM550 works with the TIM510, TIM514, and TIM521 media modules to connect IP and legacy analog telephones and trunks over IP networks.

The telephony services on the TGM550 are controlled by a Media Gateway Controller (MGC)—an Avaya media server running Avaya Communication Manager (CM) call processing software. The TGM550 is managed by an MGC located at headquarters or in a branch office. When the primary MGC is located at a remote location, the TGM550 uses standard local survivability (SLS) for partial MGC backup if the connection to the primary MGC is lost. This enables the J4350 and J6350 Services Routers to provide reliable telephony services to branch offices.