asterisk*CLI> show channels Channel Location State Application(Data) SIP/156-4f97 (None) Up Bridged Call(SIP/100-c774) SIP/100-c774 156@test_sip:1 Up Dial(SIP/156|20) SIP/154-920e (None) Up Bridged Call(IAX2/10.0.0.1:456 IAX2/10.0.0.1:4569-5 5145@test_sip:1 Up Dial(SIP/154|20|t) 4 active channels 2 active calls asterisk*CLI> show ch channel channels channeltypes asterisk*CLI> show channels Channel Location State Application(Data) SIP/156-4f97 (None) Up Bridged Call(SIP/100-c774) SIP/100-c774 156@test_sip:1 Up Dial(SIP/156|20) SIP/154-920e (None) Up Bridged Call(IAX2/10.0.0.1:456 IAX2/10.0.0.1:4569-5 5145@test_sip:1 Up Dial(SIP/154|20|t) 4 active channels 2 active calls asterisk*CLI> changrab -bB SIP/156-4f97 SIP/154-920e [Sep 19 12:59:25] -- Stopped music on hold on SIP/156-4f97 [Sep 19 12:59:25] == Spawn extension (test_sip, 156, 1) exited non-zero on 'ChanGrab/SIP/100-c774' [Sep 19 12:59:25] -- Stopped music on hold on ChanGrab/IAX2/10.0.0.1:4569-5 [Sep 19 12:59:25] == Spawn extension (test_sip, 5145, 1) exited non-zero on 'ChanGrab/IAX2/10.0.0.1:4569-5' asterisk*CLI> show channels Channel Location State Application(Data) IAX2/10.0.0.1:4569-5 s@default:1 Up Redirected Call(SIP/100-c774) SIP/100-c774 s@default:1 Up Bridged Call(IAX2/10.0.0.1:456 2 active channels 0 active calls asterisk*CLI> The last 0 active calls should be 1, cause IAX2/10.0.0.1:4569-5 is now bridged with SIP/100-c774.