There should NOT be ringing voltage on a DID trunk--from either end. DIDs do not use ringing voltage to indicate a call, they simply go off-hook, and send the digits.
E&M was invented for analog, and thus is it totally usable for analogue tie trunks. Problem there (aside from the fact that it's an ancient technology) is whether you're using Type I, II, III, IV or V Tie trunks (which are all a bit different, up to and including the number of wires). I am almost certain that no one has made an open-source analogue tie trunk card, and even closed source/licensed cards (such as Dialogic) might be tough to find. What is your application? If we know what you're trying to integrate, we might be better able to brainstorm it with you. Analogue is generally a bad idea when you need complex signalling, and the costs add up fast. Oh, and with respect to Aliant, I suspect that they a) are not actually giving you a DID trunk, and b) don't know exactly what it is they're sending you, since they've used the catch-all "technically impossible" line on ya ;-) -- Jim Van Meggelen [EMAIL PROTECTED] http://www.oreillynet.com/pub/au/2177 "A child is the ultimate startup, and I have three. This makes me rich." Guy Kawasaki -- > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] > Sent: February 8, 2006 9:40 AM > To: [email protected] > Subject: RE: [on-asterisk] DID lines > > Ouch. This is getting ominous. I see what you mean. The DID > lines would be a form of FXS line. > > I thought I saw mention of a conversion box somewhere. Maybe > I'm thinking of the one for the proprietary phones though. > There must be a solution to this, other than PRI I mean. The > weird thing is that there is ring voltage when the call comes > in on the DID trunk. Since we are supplying the voltage to > the line, I guess I have to assume that the ring is coming > from our equipment. This definitely got me started on the > wrong tangent for the project so I'm not even sure how the > DID is supposed to work > > Thanks for the input though. I'll be wracking the old brain > today. E&M Wink start only applies to T1s right? > > Regards, > Peter M. > > > If you're talking Analogue DID, then I don't know if anyone'e ever > > done that with Asterisk/Zaptel. > > > > What you'd need is not to use FXO, but rather FXS, since the PBX is > > responsible for providing battery (48V) on an analog DID. Also, I'm > > not sure if there's a standard with respect to > > immediate/groundstart/delay dial, but that'll have to match. > > > > Finally (and possibly most problematic) is that the FXS > will deliver > > dial tone, which the C.O. will NOT be expecting. This may > or may not > > cause a problem, and I am not sure what a neat way to turn off the > > dial tone would be (some nifty hacking in indications.conf > would be a > > start, I suppose, but you're going where no one has gone > before, so be prepared to blaze a trail)! > > > > Jim. > > > > -- > > Jim Van Meggelen > > [EMAIL PROTECTED] > > http://www.oreillynet.com/pub/au/2177 > > > > "A child is the ultimate startup, and I have three. > > This makes me rich." > > Guy Kawasaki > > -- > > > > > > > -----Original Message----- > > > From: [EMAIL PROTECTED] > > > [mailto:[EMAIL PROTECTED] > > > Sent: February 8, 2006 9:06 AM > > > To: [email protected] > > > Subject: [on-asterisk] DID lines > > > > > > Just wondering if anyone has run into the situation with > trying to > > > connect DID trunks to an Asterisk server. We've run into > an impass > > > where Aliant can set up the loop as pass the calls but they can't > > > transfer the digits of the end number on the loop because this is > > > "technically not possible". Is this true? Do I need to > look at a > > > DID to loop-start converter or something? Or would there be a * > > > compatible DID card available? > > > > > > Thanks, > > > Peter M. > > ******************************************************** > Peter MacFarlane, ACP > Network Administration & Programming > Target Call Center/ Message Centre P.E.I. > ***************************************************************** > OpenBSD's PF Firewall: Now available with CARP Failover. > Nothing to do with fish, but everything to do with security! > ***************************************************************** > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] For > additional commands, e-mail: [EMAIL PROTECTED] > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 267.15.2/253 - Release > Date: 07/02/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/253 - Release Date: 07/02/2006
