Hello, Simple mathematic isn't works for your description. 1 E1 is 32 timeslots (0 through 31), one of them (timeslot #0) is always used for synchronization, so you have available 31 timeslots (channels) per E1. 4 E1 * 31 = 124 channels, so you can't have 128 channels (127 speech plus 1 signalling) on 4 E1. Or I had miss something? WBR, Paul. ----- Original Message ----- From: M Jamshed To: asterisk-ss7@xxxxxxxxxxxxxxxx Sent: Wednesday, September 06, 2006 3:14 PM Subject: [asterisk-ss7] Problem with SS7 E1's hi, Im using SS7 E1's for my IVRS set up. im using 4 E1's i mean 127 channels and 1 signalling. its like in my third E1 some of the channels are not working. The line status is idle still when i use that particular channels no voice prompt is being playes.. please give me a valid solution for this problem... im using chan_ss7 version 0.2, AXE 10 exchange -- Regards M Jamshed CC ------------------------------------------------------------------------------ _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-ss7 mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-ss7 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-ss7/attachments/20060906/7331fbc1/attachment.htm