PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
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165
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Chapter 5
Voice Configuration and Command
This chapter explains voice configuration and commands to operate voice
integration function of PassFinder AP2520.
5.1.
Voice Technologies and Concepts
5.1.1.
Voice Over IP
Voice over IP enables a VoIP Gateway to carry voice traffic (for example,
telephone calls and faxes) over an IP network. In Voice over IP, the DSP
segments the voice signal into frames, which are then coupled in groups of two
and stored in voice packets.
These voice packets are transported using IP in compliance with ITU-T
specification H.323.
Because it is a delay-sensitive Application, you need to have a
well-engineered network end-to-end to successfully use Voice over IP.
Fine-tuning your network to adequately support Voice over IP involves a series
of protocols and features geared toward quality of service (QoS). Traffic
shaping considerations must be taken into account to ensure the reliability of
the voice connection.
Voice over IP is primarily a software feature; however, to use this feature on a
VoIP Gateway, you must install a voice interface cards, each of which is
specific to a particular signaling type associated with a voice port.
