[Asterisk-Users] HELP! on disconnecting stale calls.

[Paradise Dove]

hi,
how can i hangup such calls without restarting asterisk?
the Zap channel on this case is busy for more than 7 hours!!!!
some logs are followed.

thanks,
Paradise Dove
-----------------
Nov 23 16:59:49 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25788 seconds
Nov 23 16:59:49 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25788 seconds
Nov 23 16:59:50 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25789 seconds
Nov 23 16:59:51 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25790 seconds
Nov 23 16:59:51 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25790 seconds
Nov 23 16:59:52 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25791 seconds
Nov 23 16:59:52 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25791 seconds
Nov 23 16:59:53 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25792 seconds
Nov 23 16:59:53 NOTICE[3752] chan_sip.c: Disconnecting call
'SIP/2378-740f' for lack of RTP activity in 25792 seconds
-----------------
Channel              Location             State   Application(Data)
Zap/15-1             s at incoming:1         Up      Bridged Call(SIP/2378-740f)
1 active channel
1 active call