Callmanager ver is 3.1(2c),gateways VG200 are running H.323 protocol to connect PSTN. We had an IP phone with Call Waiting on along with CFNA redirected to a mobile phone. Incoming call from the PSTN hit the IP Phone and was not redirected successfully back out to the mobile.
Caller hear ringback tone and then fast busy.
Debug isdn q931find out disconnect cause i=0x80E5 - resources unavailiable .But internal ip phone can be redirected successfully without error.
Anyone know what cause this issue. Thanks in advance.