[Asterisk-Users] problem with Zaptel

[asterisk183]

When I doing hangup the zaptel channel, Asterisk show this message:
 
 Feb  7 12:14:44 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected alarm on channel 4: Red Alarm
 Feb  7 12:14:44 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to disable echo cancellation on channel 4
 Feb  7 12:14:44 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected alarm on channel 5: Red Alarm
 Feb  7 12:14:44 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to disable echo cancellation on channel 5
 Feb  7 12:14:44 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event: Alarm (4) on Primary D-channel of span 2
 Feb  7 12:14:44 NOTICE[1745]: chan_zap.c:8458 pri_dchannel: pri_shutdown
 Feb  7 12:14:44 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared on channel 4
 Feb  7 12:14:44 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared on channel 5
 Feb  7 12:14:44 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event: No more alarm (5) on Primary D-channel of span 2
 
 
 Why? And What I can doing?
 
 Thanks
 
		
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