[asterisk-users] Pri problems

[Ruairi Hickey]

Hi,
  I have a connection between a te120p and a siemens hipath which was recently 
set up.  The connection uses etsi / e1 with no crc.  Every few hours the 
asterisk shows the pri as in alarm

asterisk01*CLI> pri show span 1
Primary D-channel: 16
Status: Provisioned, In Alarm, Down, Active
Switchtype: EuroISDN


and I have to run ztcfg to clear the alarms

asterisk01*CLI> pri show span 1
Primary D-channel: 16
Status: Provisioned, Up, Active
Switchtype: EuroISDN
Type: Network
Window Length: 0/7

and I can make / recieve calls.  Any suggestions on how to troubleshoot this, 
possible causes etc ?

thanks,
      Ruairi