Summary:ASTERISK-01989: Unreliable Dial on TDM400P FXO Channels
Reporter:ghost (ghost)Labels:
Date Opened:2004-07-11 04:35:27Date Closed:2011-06-07 14:10:24
Versions:Frequency of
Description:I have experienced a problem with a TDM400P 4 Port FXO card which does not Dial digits properly.  The problem appears to be that the digits start being dialed before the line is fully offhook and ready to accept digits, and as a result, the numbers dialed are not fully received by the telco switch.  Adding a w at the front of the dial string  fixed the problem.  The problem only occured about 25% of the Dial's made.  The problem does not occur on an X100P, only the TDM400P.


This issue was originally discussed with Digium support.  Case ASTERISK-7001
Comments:By: Brian West (bkw918) 2004-07-11 15:40:13

Try inserting a wait ie  Zap/g1/w5551212

I suspect dialtone isn't coming up fast or the FXO is dialing too fast before dialtone has a chace to get up totally.


By: ghost (ghost) 2004-07-11 16:53:42

Yes adding a w to the dial string fixed the problem.  I just thought it would be good to identify and fix the problem so everything works "out of the box".   The problem did not occur on an X100P.

Additional info - TDM400P was connected to loopstart provisioned trunks (Lucent 5ESS switch).

By: Matthew Fredrickson (mattf) 2004-07-11 21:52:36

It's not exactly a bug, per-se, it's just a characteristic of the switch and the DAA.

It's also configurable via start time in zapata.conf I believe.