Call Cut-Through Parameters - AudioCodes Mediant 3000 User Manual

Parameter
[MLPPPriorityRTPDSCP]
RTP DSCP for MLPP
Immediate
[MLPPImmediateRTPDSC
P]
RTP DSCP for MLPP
Flash
[MLPPFlashRTPDSCP]
RTP DSCP for MLPP
Flash Override
[MLPPFlashOverRTPDSC
P]
RTP DSCP for MLPP
Flash-Override-Override
[MLPPFlashOverOverRTP
DSCP]
58.10.5.7

Call Cut-Through Parameters

The call cut-through parameters are described in the table below.
Parameter
[DigitalCutThrough]
User's Manual
PremiumServiceClassMediaDiffServ or as defined in IP Profiles per call.
Defines the RTP DSCP for MLPP Immediate precedence call level.
The valid range is -1 to 63. The default is -1.
Note: If set to -1, the DiffServ value is taken from the global parameter
PremiumServiceClassMediaDiffServ or as defined in IP Profiles per call.
Defines the RTP DSCP for MLPP Flash precedence call level.
The valid range is -1 to 63. The default is -1.
Note: If set to -1, the DiffServ value is taken from the global parameter
PremiumServiceClassMediaDiffServ or as defined in IP Profiles per call.
Defines the RTP DSCP for MLPP Flash-Override precedence call level.
The valid range is -1 to 63. The default is -1.
Note: If set to -1, the DiffServ value is taken from the global parameter
PremiumServiceClassMediaDiffServ or as defined in IP Profiles per call.
Defines the RTP DSCP for MLPP Flash-Override-Override precedence
call level.
The valid range is -1 to 63. The default is -1.
Note: If set to -1, the DiffServ value is taken from the global parameter
PremiumServiceClassMediaDiffServ or as defined in IP Profiles per call.
Table 58-51: Call Cut-Through Parameters
Enables PSTN CAS channels/endpoints to receive incoming IP calls even
if the B-channels are in off-hook state.

[0] Disabled (default)

[1] Enabled
When enabled, this feature operates as follows:
A Tel-to-IP call is established (connected) by the device for a B-
1
channel.
The device receives a SIP BYE (i.e., IP side ends the call) and plays a
2
reorder tone to the PSTN side for the duration set by the
CutThroughTimeForReOrderTone parameter. The device releases the
call towards the IP side (sends a SIP 200 OK).
The PSTN side, for whatever reason, remains off-hook.
3
If a new IP call is received for this B-channel after the reorder tone has
4
ended, the device "cuts through" the channel and connects the call
immediately (despite the B-channel being in physical off-hook state)
without playing a ring tone. If an IP call is received while the reorder
tone is played, the device rejects the call.
Notes:

If the parameter is disabled and the PSTN side remains in off-hook
state after the IP call ends the call, the device releases the call after 60
960
Description
Description
Document #: LTRT-89730
Mediant 3000