Isdn And Cas Interworking-Related Parameters - 3Com VCX V7122 User Manual

ISDN and CAS Interworking-Related Parameters

In Table 27, parameters in brackets are the format in the Embedded Web Server
Table 27 ISDN and CAS Interworking-Related Parameters
ini File Field Name
*
Web Parameter Name
PlayRBTone2Tel
[Play Ringback Tone
to Tel]
114
Valid Range and Description
0 (Don't play) = The ISDN / CAS gateway doesn't play a Ringback Tone
(RBT). No PI is sent to the ISDN, unless the parameter 'Progress Indicator to
ISDN' is configured differently.
1 (Play) = The CAS gateway plays a local RBT to PSTN after receipt of a 180
ringing response (with or without SDP).
Note: Reception of a 183 response doesn't cause the CAS gateway to play an
RBT (unless 'SIP183Behavior = 1').
The ISDN gateway functions according to the parameter
'LocalISDNRBToneSource':
If the ISDN gateway receives a 180 ringing response (with or without SDP)
and 'LocalISDNRBToneSource = 1', it plays a RBT and sends an Alert with PI
= 8 (unless the parameter 'Progress Indicator to ISDN' is configured
differently).
If 'LocalISDNRBToneSource = 0', the ISDN gateway doesn't play an RBT and
an Alert message (without PI) is sent to the ISDN. In this case, the PBX /
PSTN should play the RBT to the originating terminal by itself.
Note: Reception of a 183 response doesn't cause the ISDN gateway to play
an RBT; the gateway issues a Progress message (unless
'SIP183Behavior = 1').
If 'SIP183Behavior = 1', the 183 response is treated the same way as a 180
ringing response.
2 = Play according to "early media" (default).
If a 180 response is received and the voice channel is already open (due to a
previous 183 early media response or due to an SDP in the current 180
response), the ISDN / CAS gateway doesn't play the RBT; PI = 8 is sent in an
ISDN Alert message (unless the parameter 'Progress Indicator to ISDN' is
configured differently).
If a 180 response is received but the "early media" voice channel is not
opened, the CAS gateway plays an RBT to the PSTN; the ISDN gateway
functions according to the parameter 'LocalISDNRBToneSource':
If 'LocalISDNRBToneSource = 1', the ISDN gateway plays an RBT and sends
an ISDN Alert with PI = 8 to the ISDN (unless the parameter 'Progress
Indicator to ISDN' is configured differently).
If 'LocalISDNRBToneSource = 0', the ISDN gateway doesn't play an RBT.
No PI is sent in the ISDN Alert message (unless the parameter 'Progress
Indicator to ISDN' is configured differently). In this case, the PBX / PSTN
should play an RBT tone to the originating terminal by itself.
Note: Reception of a 183 response results in an ISDN Progress message
(unless 'SIP183Behavior = 1').
If 'SIP183Behavior = 1' (183 is handled in the same way as a 180+SDP), the
gateway sends an Alert message with PI = 8, without playing an RBT.
3Com VCX V7122 SIP VoIP Gateway User Manual
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