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Following is my scenario to connect back to back PRI of two asterisk server. PRI cards are Sangoma A102D <br><br>[Asterisk1]------------[PRI]-Cross Cable---------[Asterisk2] <br><br>Asterisk1<br><br>; Span 1 (MASTER)<br>switchtype = national ; commonly referred to as NI2<br>context = from-pstn<br>group = 0,24<br>echocancel = yes<br>signalling = pri_net<br>channel => 1-23<br><br><br>Asterisk2<br><br>; Span 1<br>switchtype = national ; commonly referred to as NI2<br>context = from-pstn<br>group = 0,24<br>echocancel = yes<br>signalling = pri_cpe<br>channel => 1-23<br><br><br><br>Following is my extensions.conf stuff on both machine (extension number could be change) <br><br>[from-pstn]<br>exten => s,1,Answer()<br> same => n,Playback(hello-world)<br> same => n,Hangup()<br><br><br>[from-sip]<br>exten => _7XXX,1,Answer()<br> same => n,Dial(SIP/${EXTEN})<br> same => n,Hangup()<br><br>exten => 7527,1,Dial(DAHDI/G0/7527)<br><br><br><br>But i am getting following error when i am calling from A to B<br><br>satish-desktop*CLI><br>[Mar 25 15:40:19] WARNING[4519]: app_dial.c:2039 dial_exec_full: Unable to create channel of type 'DAHDI' (cause 34 - Circuit/channel congestion)<br>[Mar 25 15:40:19] WARNING[4519]: acl.c:698 ast_ouraddrfor: Cannot connect<br>[Mar 25 15:40:19] WARNING[4519]: chan_sip.c:3115 __sip_xmit: sip_xmit of 0x14249d0 (len 763) to 0.0.29.103:5060 returned -1: Invalid argument<br>[Mar 25 15:40:19] WARNING[4371]: chan_sip.c:3115 __sip_xmit: sip_xmit of 0x14249d0 (len 763) to 0.0.29.103:5060 returned -1: Invalid argument<br><br><br> </body>
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