On Sunday 23 September 2012, Ashish Agarwal wrote: > For some reason pri show spans does not show up. Can someone assist me to > fix this issue.
DAHDI is fussy about its configuration files. A single misconfiguration anywhere can break the whole thing, so get it working with just one span first. Make sure you set the jumpers on the card correctly for E1 operation (they are often set as T1 on delivery) and specify the correct channel to use as a D-channel (usually 16 on span 1; 1-15 and 17-31 are the B-channels. Add 31 for span 2, and so forth) and the correct signalling system. Ask someone at your telco if not certain. Another thing that can go wrong is the cabling from the NTE to the Asterisk box. Sometimes you need a straight-through cable, other times you need a crossover. Usually the active pairs are 4 and 5, and 2 and 1; so you need to cross over 1 with 5 and 2 with 4. Sometimes the polarity on pins 4 and 5 is wrong (this is the only pair with the lower-numbered pin coloured and the higher-numbered pin white) and sometimes the equipment is bothered about this, so try also a crossover from 1-4 and 2-5. Again, ask someone from your telco if not certain. Once you've got span 1 working, bring up the others one by one; and don't be afraid to grow your configs with comments where you have commented out lines and/or added explanations of what you have changed. It's always easier to take extraneous stuff out later than to try to remember what you were thinking before something interesting happened. -- AJS Answers come *after* questions. -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
