[Dec 31 02:23:54] WARNING[4534]: chan_zap.c:8832 zt_pri_error: 2 copying 5 bytes LLC 
    -- Accepting data call from '609570786' to '0911441380' on channel 0/1, span 2
[Dec 31 02:23:54] DEBUG[4534]: chan_zap.c:1602 zt_enable_ec: Echo cancellation does not make any sense on digital connections!
[Dec 31 02:23:54] DEBUG[4547]: pbx.c:1809 pbx_extension_helper: Launching 'Answer'
    -- Executing [0911441380@demo:1] Answer("Zap/4-1", "") in new stack
[Dec 31 02:23:54] DEBUG[4547]: devicestate.c:306 __ast_device_state_changed_literal: Notification of state change to be queued on device/channel Zap/4-1
[Dec 31 02:23:54] DEBUG[4547]: chan_zap.c:1638 zt_train_ec: No echo training requested
[Dec 31 02:23:54] DEBUG[4547]: pbx.c:1809 pbx_extension_helper: Launching 'h324m_loopback'
    -- Executing [0911441380@demo:2] h324m_loopback("Zap/4-1", "") in new stack
[Dec 31 02:23:54] DEBUG[4547]: app_h324m.c:533 app_h324m_loopback: h324m_loopback
H245 TerminalCapabilitySet TransferRequest
-WriteControlPDU [request]
Encode PDU [95]
Sending CMD [0,87]
H245 Request MasterSlaveDetermination
-WriteControlPDU [request]
Encode PDU [20]
Sending CMD [1,7]
Sending CMD [0] - 1 left
[Dec 31 02:23:54] DEBUG[4513]: devicestate.c:163 ast_device_state: No provider found, checking channel drivers for Zap - 4
[Dec 31 02:23:54] DEBUG[4513]: devicestate.c:289 do_state_change: Changing state for Zap/4 - state 2 (In use)
[Dec 31 02:23:54] DEBUG[4548]: app_queue.c:548 changethread: Device 'Zap/4' changed to state '2' (In use) but we don't care because they're not a member of any queue.
[Dec 31 02:23:54] DEBUG[4547]: chan_zap.c:5189 my_zt_write: Write returned -1 (Resource temporarily unavailable) on channel 4
Received SRP_NSRP_RESPONSE [0]
Sending CMD [1] - 0 left
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
Received SRP_NSRP_RESPONSE [1]
    -- Channel 0/1, span 2 got hangup request, cause 16
[Dec 31 02:24:32] DEBUG[4547]: app_h324m.c:604 app_h324m_loopback: exit[Dec 31 02:24:32] DEBUG[4547]: pbx.c:2428 __ast_pbx_run: Extension 0911441380, priority 2 returned normally even though call was hung up
[Dec 31 02:24:32] DEBUG[4547]: channel.c:1564 ast_softhangup_nolock: Soft-Hanging up channel 'Zap/4-1'
[Dec 31 02:24:32] DEBUG[4547]: channel.c:1781 ast_hangup: Hanging up channel 'Zap/4-1'
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:2652 zt_hangup: zt_hangup(Zap/4-1)
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:3237 zt_setoption: Set option AUDIO MODE, value: ON(1) on Zap/4-1
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:2686 zt_hangup: Hangup: channel: 4 index = 0, normal = 16, callwait = -1, thirdcall = -1
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:2840 zt_hangup: Not yet hungup...  Calling hangup once with icause, and clearing call
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:1651 zt_disable_ec: disabled echo cancellation on channel 4
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:3154 zt_setoption: Set option TDD MODE, value: OFF(0) on Zap/4-1
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:1583 update_conf: Updated conferencing on 4, with 0 conference users
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:3233 zt_setoption: Set option AUDIO MODE, value: OFF(0) on Zap/4-1
[Dec 31 02:24:32] DEBUG[4547]: chan_zap.c:1651 zt_disable_ec: disabled echo cancellation on channel 4
    -- Hungup 'Zap/4-1'
[Dec 31 02:24:32] DEBUG[4547]: devicestate.c:306 __ast_device_state_changed_literal: Notification of state change to be queued on device/channel Zap/4-1
[Dec 31 02:24:32] DEBUG[4513]: devicestate.c:163 ast_device_state: No provider found, checking channel drivers for Zap - 4
[Dec 31 02:24:32] DEBUG[4513]: devicestate.c:289 do_state_change: Changing state for Zap/4 - state 0 (Unknown)
[Dec 31 02:24:32] DEBUG[4549]: app_queue.c:548 changethread: Device 'Zap/4' changed to state '0' (Unknown) but we don't care because they're not a member of any queue.