On 03/18/2011 01:23 PM, Tiago Geada wrote:
Hi! I can try that tho. Where do I configure what timer to use??!
If your telcos are not synchronizing their network clocks to each other, you will not be able to solve this problem on a multi-port Digium T1/E1 card. Digium T1/E1 cards select a single master clock (either the onboard clock or the clock recovered from one of the spans) to use as the 'board clock', which is then used to transmit data on all the spans. If the master clock is not in synchronization with the clocks at the other end of those spans, then bit slips will occur and cause various sorts of problems. This is why a card is always configured to use the recovered clock from a telco span if there is one, because the onboard clock would never by in sync with it.
If you have a board connected to two telcos and their clocks are not synchronized, not only will you have trouble using a Digium card, but even using a card that can handle using multiple transmit clocks at once will not solve the underlying bit slip problem that will occur if you ever connect a channel from Telco1 to a channel from Telco2. If you *never* connect channels between Telcos, then you don't have to worry about that problem, but if you do, at some point during the call there will be buffer overruns or underruns and there will be some effect (for a normal voice call, the effect might be a short audio artifact, and fairly harmless... unless the call is a modem or FAX call, in which case it could cause the call to fail).
For your sanity, I would strongly suggest that you don't connect spans from multiple telcos/networks/etc. on a single card, but keep each span provider on their own card.
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