3Com V7122 User Manual page 206

ini File Field Name
Web Parameter Name
PlayRBTone2IP
[Play Ringback Tone to IP]
DefaultCauseMapISDN2I
P
[Default Cause Mapping
From ISDN to IP]
CauseMapSIP2ISDN_ID
[Release Cause Mapping
from SIP to ISDN]
206
Valid Range and Description
0 = Ringback tone isn't played (default).
1 = Ringback tone is played (to IP) after SIP 183+SDP or 180+SDP response
is sent.
If configured to 1 ('Play'), and if EnableEarlyMedia = 1, for IP-to-Tel calls the
gateway may play a ringback tone to IP, according to the following:
For CAS interfaces, the gateway opens a voice channel, sends a
183+SDP response and plays a Ringback tone to IP.
For ISDN interfaces, if a Progress or an Alert message with PI (1 or 8) is
received from the ISDN, the gateway opens a voice channel, sends a
183+SDP or 180+SDP response, but it doesn't play a Ringback tone to
IP. If PI (1 or 8) is received from the ISDN, the gateway assumes that
Ringback tone is played by the ISDN Switch. Otherwise, the gateway
plays a Ringback tone to IP after receiving an Alert message from the
ISDN. It sends a 180+SDP response, signaling to the originating party to
open a voice channel to hear the played Ringback tone.
To enable the gateway to send a 183/180+SDP responses, set
EnableEarlyMedia to 1.
If EnableDigitDelivery = 1, the gateway doesn't play a Ringback
tone to IP and doesn't send 183 or 180+SDP responses.
Defines a single default ISDN Release Cause that is used (in ISDN to IP calls)
instead of all received release causes except when the following Q.931 cause
values are received: Normal Call Clearing (16), User Busy (17), No User
Responding (18) or No Answer from User (19).
The range is valid Q.931 release causes (0 to 127). The default value is 0
(indicates that the parameter is not configured - static mapping is used).
Defines a flexible mapping of SIP Responses and Q.850 Release Causes.
CauseMapSIP2ISDN_<ID> = <SIP Response>,<Q.850 Release Cause>
When a SIP response is received (from the IP side), the gateway searches this
mapping table for a match. If the SIP response is found, the Release Cause
assigned to it is sent to the PSTN. If no match is found, the default static
mapping is used.
For example:
CauseMapSIP2ISDN=404,3
This parameter can appear up to 12 times.
V7122 GatewayUser Guide