Hi,<br><br>I need help in debugging hangup cause 548, &#39;Disconnected after permitted retries&#39; while attempting rxfax().<br><br>Logs show that T4 expires in phase T30_PHASE_B_RX. <br>T30 PHASE B concerns exchange of DIS/DCS messages. After sending DIS, mod spandsp keeps waiting for DCS and exhausts its retries.<br>
<br>Please guide me how to debug the root cause of loss of DCS message. Logs are mentioned below:<br><br>2011-03-07 15:53:48.675180 [DEBUG] switch_ivr.c:557 OpenZAP/4:1/43851609 Command Execute rxfax(/srv/fax/in/fcf15a4c-48a4-11e0-919e-7bf53bcc3f81.tiff)<br>
2011-03-07 15:53:53.334614 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 Send complete in phase T30_PHASE_B_TX, state 17<br>2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 DIS:<br>2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30   .... ...0= Store and forward Internet fax (T.37): Not set<br>
2011-03-07 15:53:53.335619 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30   .... .0..= Real-time Internet fax (T.38): Not set<br>:<br>:<br>2011-03-07 15:53:53.875238 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 Start T4<br>2011-03-07 15:53:53.895315 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 HDLC signal status is Carrier up (-2) in state 17<br>
2011-03-07 15:53:53.915402 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 HDLC signal status is Carrier down (-1) in state 17<br>2011-03-07 15:53:57.335032 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 T4 expired in phase T30_PHASE_B_RX, state 17<br>
2011-03-07 15:53:57.335032 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 Retry number 1<br><br><br>Please guide me how to debug the root cause of loss of DCS message.<br>Thanks,<br>Sadhika<br>