3Com VCX V7122/SIP VoIP Gateway User Manual
81
Table 19
SIP Configuration Parameters
INI File Field Name
GUI Parameter Name
*
Valid Range and Description
RouteModeIP2Tel
(IP to Tel Routing Mode)
0 = Route calls before number manipulation (default)
1 = Route calls after number manipulation
Defines the execution order of number manipulation as opposed to the
routing rules.
RouteModeTel2IP
(Tel to IP Routing Mode)
0 = Route calls before number manipulation (default)
1 = Route calls after number manipulation
Defines the execution order of number manipulation as opposed to the
routing rules.
Not applicable if proxy routing is used.
PlayRBTone2Tel
(Play Ringback Tone to Tel)
0 = Do not play RBT if Early Media feature is enabled
1 = Play RBT
2 = Do not play RBT if Early Media feature is enabled or ISDN protocol is
used (default)
If PlayRBTone2Tel=0 and 183 session progress with SDP message was
received, the Gateway cuts through the voice channel and does not play
ringback tone. No progress indicator is sent in ISDN ALERT message
(unless the Progress Indicator to ISDN parameter is configured
differently).
If 180 ringing is received, the Gateway plays RBT to PSTN. PI=8 is sent
(unless Progress Indicator to ISDN parameter is configured differently).
For ISDN spans if PlayRBTone2Tel=1, on reception of 180/183
responses the Gateway plays ringback tone and PI=8 is sent in ISDN
ALERT message (unless the Progress Indicator to ISDN parameter is
configured differently).
If PlayRBTone2Tel=2 and 183 session progress with SDP message was
received, the Gateway cuts through the voice channel and it does not
play ringback tone. PI=8 is sent in ISDN ALERT message (unless the
Progress Indicator to ISDN parameter is configured differently).
If 180 ringing was received, the ISDN Gateways does not play ringback
tone to PSTN. A PI value is not sent (unless the Progress Indicator to
ISDN parameter is configured differently). CAS Gateways play ringback
tone to PSTN.
PlayRBTone2IP
(Play Ringback Tone to IP)
0 = Do not play (default)
1 = The Gateway plays ringback tone to IP after sending SIP 183 session
progress response
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