AudioCodes Mediant 500L MSBR

User's Manual 530 Document #: LTRT-10466
Mediant 500L MSBR
31.7.4 Interworking SIP PRACK Messages
The device supports interworking of SIP Provisional Response ACKnowledgement
(PRACK) messages (18x). While some UAs may not support PRACK (RFC 3262) others
may require it. The device can be configured to resolve this interoperable issue and enable
sessions between such endpoints. SIP PRACK handling is configured using the IP Profile
parameter, 'SBC Prack Mode':

Optional: PRACK is optional for these UAs. If required, the device performs the
PRACK process on behalf of the destination UA.

Mandatory: PRACK is required for these UAs. Calls from UAs that do not support
PRACK are rejected. Calls destined to these UAs are also required to support
PRACK.

Transparent (default): The device does not intervene with the PRACK process and
forwards the request as is.
31.7.5 Interworking SIP Session Timer
The device supports interworking of the SIP signaling keep-alive mechanism. The SIP
standard provides a signaling keep-alive mechanism using re-INVITE and UPDATE
messages. In certain setups, keep-alive may be required by some SIP UAs while for others
it may not be supported. The device can resolve this mismatch by performing the keep-
alive process on behalf of SIP UAs that do not support it.
For configuring the handling of session expires, use the IP Profile parameter, 'SBC Session
Expires Mode'.