I recently converted my H323 gateway to SIP trunk. The PSTN is till on PRIs. Since then, I have some very strange issues.
For certain conference bridge numbers, it will not provide the regular prompt for conference code, etc, instead it just rings and rings for 6 - 8 times, and gave out differerent messages.
I did trace on CUCM7 and debug on router, and then had a case open with TAC, the engineer could not find anything wrong.
I suspect that somehow certian SIP information is leaked through PRI, and the called party most likely have SIP trunk as well. Is there anyway to filter the SIP info from leaking through PRI? I also noticed when I dial certain number, and  or other random charactors might show up at TO: field.
Any one had similiar issue?