The problem would occur there too, because the 4604 card when used in gateway mode is H.323 just like a 3600 router.
You should be able to go into the pots and voip dial-peers you have configured on the 4604 card and make sure you have turned on all the progress_ind commands available on each one. You want to enable the progress_ind for each possible message (e.g. setup, progress, etc) and make sure the number you use is the highest one, which is either 3 or 8 depending on which message you are configuring.
No ringback occurs on transfer from PSTN calls coming in on IOS gateway.
With Cisco CallManager 3.0(1) connecting to the PSTN via an H.323 gateway, if a call comes into a phone and it is blind transferred to another phone, the PSTN side will only receive dead air; ringback does not occur.
The Cisco CallManager software has been modified to send the H225UserInfo message to the IOS gateway with Q931 Signal IE, so the IOS gateway can play/stop ringback tone for the call that is being transferred to another party. This fix has to work with the fix for CSCds87266, which was opened against the IOS gateway. The fix for CSCds87266 may not be ready until the next major feature release. Therefore, even the Cisco CallManager can send the h.225 Suriname message to the IOS gateway. The problem cannot be verified until the IOS gateway is fixed.
Bug Id : CSCds87266
Headline No ringback played to PSTN when IP phones initiates a transfer
Product c3600 Model
Component voice-callcontrol Duplicate of
Severity 3 Status A
Version Found 12.2 12.1(5)T Fixed-in Version ?
When a call to an IP phone is answered, then transferred, the caller does not hear ringback. When the transferred call is answered, both parties are able to hear each other. There is no workaround.
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