Often i can see that cic, which is shown on MGC in IDLE state(mml command rtrv-tc), on gateway(as5400) is still in busy state. show mgcp connection shows me the following:
5. S3/DS1-0/29 C=4A05B,2150032,2150033 I=0x17B8 P=16650,0 M=4 S=4,4 CO=6 E=0,0,0,0 R=0,0
and show call act v b shows only one call leg
3FC0 : 1201552451hs.1 +0 pid:1 Originate active
dur 00:18:47 tx:0/0 rx:37568/1127040
Tele 3/0:0 (2150032): tx:1127050/0/0ms g729r8 noise:-120 acom:127 i/0:-48/-87 dBm
only after beginning of auditing process on mgc (sta-aud mml command) hunged mgcp connection usually is dropped. but sometimes on MGCP -> DLCX gateway responds with MGCP -> 1553037 Endpt in transient state
and cic can be freed only after reloading the gateway