Alcatel-Lucent omniacces-voip gateway User Manual

 

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As shown below, the main functions handled by Alcatel’s H.323 VoIP Gateway include the 
following:

•

Telephony Signaling — used to communicate with the PSTN or Customer Premises 
Equipment (CPE).

•

Payload Packetization and Digital Signal Processing (via DSP) — converts PCM voice 
packets from circuit-switched network to H.323 packets on IP network and the 
reverse.

•

H.323 Network Call Control — handles H.245 and H.225 packet processing, e.g., 
connect, disconnect.

•

Alcatel VoIP Network Dialing Schemes (AVNDS) — handles conversions between 
phone numbers and IP address of H.323 devices.

•

Network Switch Backplane Interface — connects H.323 VoIP gateways to switch and 
ultimately to IP network.

These functions can generally be divided into either voice or convergence features, based on 
the controls they provide over VoIP in the switch. For the most part, the voice features 
include separate controls for signaling and for voice interoperability, whereas, the conver-
gence features encompass H.323 call control and voice/data interoperability via the use of 
AVNDS in IP networks.