On 30/07/13 15:36, Andre Goree wrote:
/etc/dahdi/system.conf:
span=1,0,0,ESF,B8ZS
bchan=1-23
dchan=24
loadzone=us

The first '0' in your span line above indicated that asterisk is generating the timing source. Normally the network operator provides timing so I would expect this to be a '1'. This can be the cause of the issue you are seeing as each end will be using a different clock which can be out of sync or drift causing data corruption, signalling errors and the d channel going down.

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