Thank you Mitul for your answer. Yes, we have tested e&m before and it works. But I don't know why. That is what I don't understand. You said that E&M signalling does not have separate signalling channel, that is true for the T1 but not for E1. My understanding is that E1 CAS pass the E&M information in the bits abcd of channel 16, the signalling channel. Regards -- Jorge Mendoza
----- Original Message ----- From: "Mitul Limbani" <mi...@enterux.in> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users@lists.digium.com> Sent: Wednesday, 25 July, 2012 8:15:25 PM Subject: Re: [asterisk-users] Dahdi+Redfone+Channel Bank+E&M E&M signalling do not have seperate signalling channel. Configure as e&m=1-31 Mitul On Jul 26, 2012 6:40 AM, "Jorge Mendoza" < jmendo...@tcc.com.pe > wrote: Hi, We are trying to connect an Asterisk server with a Channel Bank with E&M interfaces using a RedFone TDMoE device. The CB have a E1 CAS interface. OS: Ubuntu Server 11.10 64 bits dahdi: dahdi-linux-complete-2.6.1+2.6.1 Redfone configuration: /etc/redfone.conf [span1] framing=cas encoding=hdb3 System configuration: /etc/dahdi/system.conf dynamic=ethmf,eth0/00:50:c2:65:e0:64/0,31,1 dynamic=ethmf,eth0/00:50:c2:65:e0:64/1,31,0 e&me1=1-15,17-31 dchan=16 alaw=1-31 loadzone = fr defaultzone = fr Error message: ======================================================== # dahdi_cfg -vvvvv Changing signalling on channel 1 from Unused to E & M E1 Changing law on channel 1 from Mu-law to A-law DAHDI_CHANCONFIG failed on channel 1: Invalid argument (22) Selected signaling not supported Possible causes: e&me1 signaling is being used on a T1 line (use e&m) RBS signaling is being used on a E1 CCS span Signaling is being assigned to channel 16 of an E1 CAS span ========================================================= I don't understand the last possible cause mentioned: "Signaling is being assigned to channel 16 of an E1 CAS span", because the dchan is channel 16. Where is the error? Thank you. -- Jorge Mendoza -- _____________________________________________________________________ -- 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 -- _____________________________________________________________________ -- 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
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