3Com VCX V7122 User Manual page 115

ini File Field Name
*
Web Parameter Name
PlayRBTone2IP
[Play Ringback Tone to
IP]
ProgressIndicator2ISDN
ProgressIndicator2IP
PIForDisconnectMsg
[Set PI in Rx Disconnect
Message]
ConnectOnProgressInd
3Com VCX V7122 SIP VoIP Gateway User Manual
Valid Range and Description
0 = Ringback tone isn't played (default).
1 = Ringback tone is played (to IP) after SIP 183 session progress response is
sent.
If configured to '1' (Play),
For IP Tel calls, if a Progress or an Alert message with PI is sent from the
ISDN and 'EnableEarlyMedia = 1', the VCX V7122 opens a voice channel and
sends 183 response. It doesn't play a Ringback tone to IP (assuming that the
Ringback tone is played by the ISDN).
Otherwise, if a voice channel isn't opened, the VCX V7122 plays Ringback
tone to IP, after receiving an Alert message from the ISDN. It sends 183
response, signaling the originating party to open a voice channel in order to
hear the played Ringback tone.
Note 1: To enable the gateway to send a 183 response, set
'EnableEarlyMedia' to 1.
Note 2: If 'EnableDigitDelivery = 1', the gateway doesn't play a Ringback tone
to IP and doesn't send a 183 response.
0, 1 or 8
-1 = Not configured (default).
If set to "0" PI is not sent to ISDN.
If set to "1" or "8" the PI value is sent to PSTN in Q.931/Proceeding and
Alerting messages.
If not configured, the PI in ISDN messages is set according to the "Play
Ringback to Tel" parameter.
Usually if PI = 1 or 8, the PSTN/PBX cuts through the audio channel without
playing local Ringback tone, enabling the originating party to hear remote Call
Progress Tones or network announcements.
-1 = (Not configured) for ISDN spans, the PI that is received in ISDN
Proceeding, Progress and Alert messages is used as described in the
following options (default).
0 = (No PI) For IP Tel call, the gateway sends "180 Ringing" SIP response to
IP after receiving ISDN Alert, or (for CAS) after placing a call to PBX/PSTN.
8, 1 = For IP Tel call, if 'EnableEarlyMedia=1', the gateway sends "183
session in progress" message + SDP, after a call is placed to PBX/PSTN over
the trunk. This is used to cut through voice path, before remote party answers
the call, enabling the originating party to listen to network Call Progress Tones
(such as Ringback tone or other network announcements).
Defines the gateway's behavior when a Disconnect message is received from
the ISDN before a Connect message was received.
"Not configured" = Sends a 183 message according to the received PI in the
ISDN Disconnect message. If PI = 1 or 8, the gateway sends a 183 response,
enabling the PSTN to play a voice announcement to the IP side. If there isn't a
PI in the Disconnect message, the call is released (default).
0 = Do not send a 183 message to IP. The call is released.
1, 8 = Sends 183 message to IP.
0 = Connect message isn't sent after 183 Session Progress is received
(default).
1 = Connect message is sent after 183 Session Progress is received.
This feature enables the play of announcements from IP to PSTN without the
need to answer the Tel IP call. It can be used with PSTN networks that don't
support the opening of a TDM channel before an ISDN Connect message is
received.
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