The call is received from the PSTN by an NMS E1 with ISDN Pri (EuroISDN) and is switched to the NMS T1 using NMS MVIP internal bus switch that is similar to a H.100 bus with few streams/timeslots.
Once in the T1 (which is running National ISDN 2 Pri) this board "calls" the TE110P in asterisk which is connected by a loopback cable. Asterisk receives call, asnwer it and do the stuff planned in the dialplan. Both T1 boards where first configured using ulaw and then alaw. In both cases the sound had distortion. Today I test another configuration trying to isolate error. Instead of using a NMS T1, I used another NMS E1 and I configure TE110P as an E1 using in both boards also EuroISDN and everything began to work fine. I also connect the TE110P to a live E1 and again everything is Ok. I not sure that the distortion is an encoding difference but it really seems that there is the problem. Configuration for T1 in zaptel.conf span=1,0,0,esf,b8zs bchan=1-23 dchan=24 alaw=1-23 I check with command in CLI zap show channel 1 the Default law indicates alaw as expected. If I comment last line works the same but it indicates ulaw. zapata.conf: callprogress=no signalling=pri_cpe switchtype=national overlapdial=yes usecallerid=yes hidecallerid=no immediate=no echocancel=no echocancelwhenbridged=no callerid=asreceived context=incoming-call channel=1-23 language=es rxgain=0.0 txgain=0.0 Sorry for so long mail and thanks. Alejandro Ghergherian _______________________________________________ Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
