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The C-LAN circuit pack is used for all IP call signaling for both IP trunks and stations. This circuit
pack also provides TCP/IP connectivity to such adjuncts and synchronous applications as Call
Management System (CMS) and INTUITY AUDIX.
This circuit pack also supports firmware download capability for all firmware-downloadable
circuit packs in a PN, which allows administrators to remotely update the firmware or application
code of circuit packs such as the TN799DP (C-LAN) or TN2302AP Media Processor.
The S8700 platforms support a maximum of 64 C-LAN circuit packs per system. The number of
C-LAN circuit packs that are required depends on the number of IP endpoints that are
connected, and the options that the endpoints use. For example, it might be advantageous to
segregate IP voice control traffic from device control traffic.
IP Media Processor (TN2302AP) - (The TN2302 (MedPro) circuit pack is a media processor
that provides a gateway between the TDM bus and the Ethernet network for the audio streams.
The S8700 Multi-Connect requires resources on a TN2302 circuit pack for IP Telephony bearer
communications. The MedPro includes a 10/100 BaseT Ethernet interface to support IP trunks
and H.323 endpoints. The MedPro can perform echo cancellation, silence suppression,
dual-tone multi-frequency (DTMF) detection, and conferencing.
As shown in
Figure 15: TN2302AP Media Processor (MedPro) operation
on page 56, the
Media Processor converts circuit-switched audio streams to packet-switched streams. The
Media Processor supports multiple codecs, so it can compress audio samples during
packetization. When needed for conference calls, it can also take multiple audio streams, sum
them together, and send the resulting audio stream to multiple recipients on the network.
Issue 3.4.1 June 2005
55
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