The P32mxi can convert the 32 on-board VF channels into "packetized voice." There are three types of packetization supported:
Voice over Broadband (ATM-style)
Voice over IP (IP-style)
The RAVE Module and at least one Voice DSP module are required to do packetized voice.
The diagram below describes how Voice over Broadband (VoBB) works from a network perspective. In VoBB, both voice and data are transported in ATM cells down either a T1 or xDSL circuit.
To provision the P32mxi for either the Carrier-style transport (Jetstream/Coppercom) or Voice/Multimedia over ATM (VMOA), see the section on Provisioning Voice over Broadband.
The P32mxi system can convert analog voice channels to VoIP packets using the Media Gateway Control Protocol (MGCP). Both voice and data packets are routed through the normal IP network. This can cause audio quality problems if there are large delays in the IP network. Delays greater than 150ms are very noticable and will cause people at the far-end to ask you to call them back on regular POTS lines!
VoIP packets can be sent as part of an ATM data network (as AAL5 cells). Currently, Quality of Service (QOS) is more easily controlled on an ATM network, and may improve audio quality in a network with a large amount of mixed VoIP/data traffic.
To provision the P32mxi to convert analog channels to VoIP, see the section on Provisioning Voice over IP.
The P32mxi can transport voice packets over a Frame Relay link using the FRF.11 standard. VoFR is used as a transport service only.
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