I have a CME on site A with 172.18.25.0/24 and the phones works fine! I'm using a ip phone 7906 in another site (B) with address 172.16.20.0/24 and registered in cme on site A.
The IP is registered and I talk with another ip phones in site A.
The CME on site A don't have link to PSTN, the calls are send to HiPath 4000 in Site B by dial-peer voip.
The ip phones on site A call to analog phones in HiPath 4000 on site B. But the ip phone in site B, registered in CME on site A, don't call on analog phone in HiPath4000 on site B.
When IP Phone is calling Analog Phone, the calls are completed but don't have audio. When Analog Phone make a call to IP Phone the callls are completed but there is audio one way.
What's the possible problems?
my thinking is that there is some issue with respect to routing here and not necessarily a "phone" issue.
what doe syour config on site B look like. Also is the PBX at site B a full IP Pbx or are you connecting to it via analog trunks connected to the router
sorry im probably getting a little tired ...... pressed twice :)