Limiting Sbc Call Duration; Sbc Authentication; Sip Authentication Server Functionality - AudioCodes Mediant 4000 SBC User Manual

transparently, negotiate fax according to fax settings in IP Profile, or enforce remote
UA to first establish a voice channel before fax negotiation.

IPProfile_SBCFaxCodersGroupName: defines the supported fax coders (from the
Coder Groups table).

IPProfile_SBCFaxOfferMode: determines the fax coders sent in the outgoing SDP
offer.

IPProfile_SBCFaxAnswerMode: determines the fax coders sent in the outgoing SDP
answer.

IPProfile_SBCRemoteRenegotiateOnFaxDetection: You can also configure the device
to detect for faxes (CNG tone) immediately after the establishment of a voice channel
(i.e., after 200 OK) and within a user-defined interval. If detected, it can then handle
the subsequent fax renegotiation by sending re-INVITE messages to both SIP entities
(originating and terminating faxes). For more information, see the parameter in
''Configuring IP Profiles'' on page 418.
Note: The voice-related coder configuration (Allowed and Extension coders) is
independent of the fax-related coder configuration, with the exception of the G.711
coder. If the G.711 coder is restricted by the Allowed Audio Coders Groups table, it is
not used for fax processing even if it is listed in the Coder Groups table for faxes.
However, support for G.711 coders for voice is not dependent upon which fax coders
are listed in the Coder Groups table.
21.7

Limiting SBC Call Duration

You can configure the maximum allowed call duration (in minutes) per SBC call. If an
established call reaches this user-defined limit, the device terminates the call. The feature
ensures that calls are properly terminated, allowing available resources for new calls. The
following procedure describes how to configure the feature for all calls (globally). To
configure the feature per specific calls, use IP Profiles (IpProfile_SBCMaxCallDuration).

To configure maximum call duration:
1. Open the SBC General Settings page (Setup menu > Signaling & Media tab > SBC
folder > SBC General Settings).
2. In the 'Max Call Duration' field (SBCMaxCallDuration), enter the maximum call
duration per SBC call:
3. Click Apply.
21.8

SBC Authentication

The device can authenticate SIP servers and SBC users (clients). The different
authentication methods are described in the subsequent subsections.

21.8.1 SIP Authentication Server Functionality

The device can function as an Authentication server for authenticating received SIP
message requests, based on HTTP authentication Digest with MD5. Alternatively, such
requests can be authenticated by an external, third-party server.
User's Manual
Figure 21-6: Configuring Maximum Call Duration
472
Mediant 4000 SBC
Document #: LTRT-40203