The voice messaging ports in the phone system connected by digital lines to the ports on the PIMG units.
We recommend that you connect the voice messaging ports on the phone system to the ports on the PIMG units in a planned manner to simplify troubleshooting. For example, the first phone system voice messaging port connects to the first port on the first PIMG unit, the second phone system voice messaging port connects to the second port on the first PIMG unit, and so on.
The PIMG units connected to the same LAN or WAN that Cisco Unity is connected to.
If the PIMG units connect to a WAN, the requirements for the WAN network connections are:
For G.729a codec formatting, a minimum of 32.76 Kbps guaranteed bandwidth for each voice messaging port.
For G.711 codec formatting, a minimum of 91.56 Kbps guaranteed bandwidth for each voice messaging port.
No network devices that implement network address translation (NAT).
A maximum 200 ms network latency.
The phone system ready for the integration, as described in the documentation for the phone system.
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