Nortel Networks Circuit Card - Manual (Page 843)

NTVQ01xx Media Card Page 843 of 906
Circuit Card Description and Installation
RS-232 Asynchronous Maintenance Port
An 8-pin mini-DIN socket on the NTVQ01xx Media Card faceplate provides
access to the RS-232 port. This faceplate port can provide access to the Media
Card for OA&M purposes. The maintenance port is also available through a
female DB9 connector on the 50-pin I/O Adaptor. This should be used to
make a permanent terminal connection.
Functional description
Media Cards have different types of firmware pre-installed, depending on the
application being supported. The Voice Gateway application enables Digital
Signal Processors (DSPs) for either line or trunk applications. When the
Voice Gateway application is installed on the Media Card, the card is called
the Voice Gateway Media card. Other examples of applications on a Media
Card include IP Line 3.0 and Integrated Recorded Announcer.
The NTVQ01xx Media Card connects an IP and circuit-switched device. The
DSPs perform media transcoding between IP voice packets and
circuit-switched devices. The Media Card also provides echo cancellation
and compression/decompression of voice streams.
Survivability
Refer to Communication Server 1000S: Installation and Configuration
(553-3031-210) for instructions on configuring the card for survivability.