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Codec Preference – Incoming Calls

When the Codec Preference feature is enabled, the system uses the following logic for handling incoming calls,

based upon the content of the first SIP INVITE request.

Preferred Codec is G.729

First SIP INVITE Request Content Codec Used for Call

SIP Trunk supports G.729

The IP Codec table of Enterprise Manager is ignored. The system uses

codec G.729 to negotiate with the endpoint.

SIP Trunk does not support G.729 No codec is enforced.

Preferred Codec is G.711 Mu-Law

First SIP INVITE Request Content Codec Used for Call

SIP Trunk supports G.711 Mu-Law

The IP Codec table of Enterprise Manager is ignored. The system uses

codec G.711 Mu-Law to negotiate with the endpoint.

SIP Trunk does not support G.711

Mu-Law

No codec is enforced.

If the target extension or DNIS number is enabled for Fax-Over-IP (FoIP), then no codec is enforced.

Codec Preference – Outgoing Calls, Third-Party IP Phones

When the Codec Preference feature is enabled, the system uses the following logic for handling outgoing SIP trunk

calls from third-party IP phones. (Calls are considered SIP trunk calls if the target has a SIP trunk access code or an

outcall routing access code prefix.)

Preferred Codec is G.729

First SIP INVITE Request Codec Used for Call

Supports G.729

The IP Codec table of Enterprise Manager is ignored. The system uses

codec G.729 to negotiate with the endpoint.

Does not support G.729 No codec is enforced.

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Altigen MAXCS 7.5 New Features Guide Manual de usuario Pagina 14