Vodavi XTS-IP Technical Information download pdf (Page 503)

Installation D-7

Appendix D - Voice Over the Internet Protocol

The following chart shows the bandwidth consumption by vocoder.

Figure D-1: Bandwidth Consumption by Vocoder

IP Phones

IP phones using the H.323 Revision 2 protocol will work with the Discovery VoIP card. The IP

phone, however, will not be integrated into the system. Instead, the IP phone resembles a

single-line telephone that uses the Internet or other IP network instead of the PSTN. IP

phones allow dialing using the IP address of the destination system. Most IP phones allow the

user to program a button with the IP address of the system to dial. This allows the user to dial

in to the VoIP card where they are directed to the attendant. The attendant then transfers the

user to the desired extension.

The vocoder standards may not be as flexible for the IP phone as the Discovery VoIP card.

Ensure that the vocoder standards used on the KSU match the standards that are used on the

IP phone. For example, a phone that uses only

the G.711 U-law standards can initiate a call

with any Discovery VoIP card. However, for a call to be initiated successfully by the KSU to the

IP phone used in this example, the KSU default standard (G.723.1) must be changed to the

G.711standard.

Not all IP phone manufacturers have adopted the H.323 Revision 2 standard. Therefore,

Vodavi cannot guarantee the compatibility or performance of IP phones.

Bandwidth Usage (Kbs)

Bandwidth Usage per Port

Bandwidth Requirements

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