2006/3/30, Don Pobanz <[EMAIL PROTECTED]>:
How would you check clocks speeds at opposite ends of a circuit (T1, E1, BRI, ...) ?
As it seems frame slips occur from time to time (for instance, on 10% of received faxes), do you imply that Asterisk settings should be changed so that on every fax received, it should adopt opposite clock speed (unlike today where by chance, 90% of circuit clock speeds are the same) ?
Regards
Adolfo R. Brandes wrote:
> Lee Howard wrote:
>> However, based on the comments you give I'd suspect that you're having
>> what people seem to be calling "frame slipping". There seem to be
>> some motherboards that react poorly with Zap cards (or their
>> respective drivers) and cause that. Your zttest results should be
>> revealing here.
Frame slips are NOT motherboard related!
A Frame slip is due to clocks at opposite ends of a circuit such as a T1
running at different speeds. Either a buffer overflows and one frame is
thrown away or there is no data when a frame is needed so the previous
frame is repeated.
The solution is to have one end of the circuit supply the clock and the
other end derive the clock from the incoming signal.
Don Pobanz
How would you check clocks speeds at opposite ends of a circuit (T1, E1, BRI, ...) ?
As it seems frame slips occur from time to time (for instance, on 10% of received faxes), do you imply that Asterisk settings should be changed so that on every fax received, it should adopt opposite clock speed (unlike today where by chance, 90% of circuit clock speeds are the same) ?
Regards
Olivier
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