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