I have a problem with my solution IP telephony with call manager 4.2(3).
When i try to call from ip phone->ip phone or ip phone -> PSTN (PRI), every thing is ok, but when i hung up again the phone the number still blocked in the phone and i had no tonality, is during blocked (may be 20 sec).
Note: CCM version 4.2(3)
OS version: 2000.4.3a
ip phones 7911 and 7960
CCM configured with MGCP gateway 2811, and i've PRI E1
Thanks is very urgent.