[Asterisk-Users] echo problem

[asterisk183]

I have installed Asterisk and when I hangup the zap channel Asterisk show this message:
  
    Feb 13 17:45:49 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected alarm on channel 4: Red Alarm  
  Feb 13 17:45:49 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to disable echo cancellation on channel 4  
  Feb 13 17:45:49 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected alarm on channel 5: Red Alarm  
  Feb 13 17:45:49 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to disable echo cancellation on channel 5  
  Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event: Alarm (4) on Primary D-channel of span 2  
  Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8458 pri_dchannel: pri_shutdown  
  Feb 13 17:45:49 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared on channel 4  
  Feb 13 17:45:49 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared on channel 5  
  Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event: No more alarm (5) on Primary D-channel of span 2  
  
  What I can doing?
  
  Thanks
  
		
---------------------------------
Yahoo! Mail: gratis 1GB per i messaggi, antispam, antivirus, POP3
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060214/055fe00e/attachment.htm