Nortel Networks 1000E - Manual (Page 59)

System components Page 59 of 466
Communication Server 1000E Installation and Commissioning
daughterboard. These daughterboards provide DSP resources for connecting
IP and TDM devices, eliminating the need for installing Voice Gateway
Media Cards on the CS 1000E Media Gateways. However, Voice Gateway
Media Cards are still supported in CS 1000E.
MC32S Media Card
The MC32S is a 32-channel Voice Gateway Media Card that provides 32
Digital Signal Processor (DSP) ports to facilitate connectivity between IP and
TDM devices.
This media card replaces the existing 32-port Voice Gateway Media Card and
enables Secure Real Time Protocol (SRTP) to encrypt the IP media path to
and from all DSP channels on the MC32S. The MC32S also provides
improved echo performance over the existing media card.
Media Card
The Media Card, described in Table 3 and shown in Figure 8, connects an IP
and circuit-switched device using Digital Signal Processors (DSPs) for either
line or trunk applications. The DSPs, enabled by a Voice Gateway
application, performs media transcoding between IP voice packets and
circuit-switched devices.
The Media Card also provides echo cancellation and compression/
decompression of voice streams.
Table 3
Media Card profile (Part 1 of 2)
Property Description
Product Code • NTDU41DA
Media Card 32 Port IP Line 3.1/Voice Gateway
• NTDU41DB
Media Card 8 Port IP Line 3.1/Voice Gateway
Power • Powered through a Media Gateway or a Media
Gateway Expander.