Vanguard Managed Solutions 7300 Series Benutzerhandbuch

Vanguard 7300 Enclosures and Components 

2-27

The T1/E1/PRI Rear Transition Module connects to the T1/E1/PRI card at the 
Vanguard 7300 midplane. The T1/E1/PRI Rear Transition Module provides 12 
RJ48C connectors accessible from the rear of the chassis and shown in Figure 2-18.

See Appendix B, Vanguard 7300 Cable Connectors and Pinouts for the port pinouts.

To support digital voice functions, a Voice Server PCI PMC must be installed on the 
T1/E1/PRI card. The Voice Server PMC is a customized card designed to be 
mounted only on the Vanguard 7300 T1/E1/PRI card. This PMC cannot be installed 
anywhere else. Figure 2-16shows the PMC mounted on the T1/E1/PRI card.

A Voice Server PMC supports up to 48 T1 voice channels and 60 E1 voice channels 
per card. The Voice Server PMC provides these functions:

• Voice compression and decompression by G.723.1, G.279A, and G.711

• Signal processing

• Digital voice processing functions

• Voice Activity Detetion (VAD) or Digital Speech Interpolation (DSI)

• Echo Cancellation (up to 16 ms. delay)

• Adaptive Smoothing Delay

• Dynamic Modem support

• Fax support

The Voice Server PMC has no physical ports of its own. Voice ports can only 
terminate on the first two ports on the T1/E1/PRI card rear transition module.

Digital Voice ports are booted twice when the node is warm-booted. Two “port 
boot complete” messages are displayed.

Serial No. Location