AudioCodes Mediant 2000 User Manual page 272

Parameter
[NumberOfActiveDialogs]
[TransparentCoderOnDataC
all[
EMS: T38 Use RTP Port
[T38UseRTPPort]
Web/EMS: Default Release
Cause
[DefaultReleaseCause]
SIP User's Manual
message after a call is placed to PBX/PSTN over the trunk.
Defines the maximum number of active SIP dialogs that are not call
related (i.e., REGISTER and SUBSCRIBE). This parameter is used
to control the Registration / Subscription rate.
The valid range is 1 to 20. The default value is 20.

[0] = Only use coders from the coder list (default).

[1] = Use transparent coder for data calls (according to RFC
4040).
The 'Transparent' coder can be used on data calls. When the device
receives a Setup message from the ISDN with 'TransferCapabilities
= data', it can initiate a call using the coder 'Transparent' (even if the
coder is not included in the coder list).
The initiated INVITE includes the following SDP attribute:
a=rtpmap:97 CLEARMODE/8000
The default Payload Type is set according to the CoderName table.
If the Transparent coder is not set in the Coders table, the default
value is set to 56. The Payload Type is negotiated with the remote
side, i.e., the selected Payload Type is according to the remote side
selection.
The receiving device must include the 'Transparent' coder in its
coder list.
Defines the port (with relation to RTP port) for sending and receiving
T.38 packets.

[0] = Use the RTP port +2 to send / receive T.38 packets
(default).

[1] = Use the same port as the RTP port to send / receive T.38
packets.
Notes:

For this parameter to take effect, you must reset the device.

When the device is configured to use V.152 to negotiate audio
and T.38 coders, the UDP port published in SDP for RTP and for
T38 must be different. Therefore, set the the parameter
T38UseRTPPort to 0.
Defines the default Release Cause (sent to IP) for IP-to-Tel calls
when the device initiates a call release and an explicit matching
cause for this release is not found.
The default release cause is NO_ROUTE_TO_DESTINATION (3).
Other common values include NO_CIRCUIT_AVAILABLE (34),
DESTINATION_OUT_OF_ORDER (27), etc.
Notes:

The default release cause is described in the Q.931 notation and
is translated to corresponding SIP 40x or 50x values (e.g., 3 to
SIP 404, and 34 to SIP 503).

When the Trunk is disconnected or is not synchronized, the
internal cause is 27. This cause is mapped, by default, to SIP
502.

For mapping SIP-to-Q.931 and Q.931-to-SIP release causes,
refer to "Configuring Release Cause Mapping" on page 151.

For a list of SIP responses-Q.931 release cause mapping, refer
to Release Reason Mapping on page 472.
272
Description
Document #: LTRT-68809
Mediant 2000