I've some DID's that I'm using for in-bound faxing, but I'm having some trouble with getting that working perfectly on my T1. So I'm thinking of pointing them to an analog line. Will the DID's simply come in over the analog, presumably sending the DID digits via DTMF? Or is that not something that'll work? Thanks, -Ken
> I've some DID's that I'm using for in-bound faxing, but I'm having some > trouble with getting that working perfectly on my T1. So I'm thinking of > pointing them to an analog line. Will the DID's simply come in over the > analog, presumably sending the DID digits via DTMF? Or is that not > something that'll work?There is no real technical reason why DID digits can't be sent over an analog pstn line, however I do not know of any telco in the US that actually supports that. Twenty-plus years ago, that would be the "only" way of handling DID's (since digital facilities didn't exist at that level), but the implemention usually involved "E & M trunking" over analog circuits. I believe asterisk does support at least some level of E & M trunking, but not sure if it applies to the TDM04b-type cards.
Ken, Analog DID's are a bit backwards compared to normal POTS lines. I don't know about outside the US, but here (in California, specifically) I've done a few analog DID installs on some NEC PBX equipment. The trick is that with an analog DID line, the CPE provides the battery to the telco (i.e. the DID phone line plugs into an FXS port on your equipment instead of an FXO port). The DTMF's come from the telco but only because the telco "goes offhook" and sends the DTMF's down the line, and then connects the call. If you point a DID number at a regular POTS line then when a call rings in it simply rings in like a regular analog phone line. Unless the carrier can provide some form of DNIS on an analog line I believe you'd need one POTS line per DID number. Or you could order one DID trunk group and point all of your DID numbers to it and use FXS ports to handle those incoming calls... -MC -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Ken D'Ambrosio Sent: Monday, January 30, 2006 8:22 AM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] DID over analog? I've some DID's that I'm using for in-bound faxing, but I'm having some trouble with getting that working perfectly on my T1. So I'm thinking of pointing them to an analog line. Will the DID's simply come in over the analog, presumably sending the DID digits via DTMF? Or is that not something that'll work? Thanks, -Ken _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users- > bounces@lists.digium.com] On Behalf Of Ken D'Ambrosio > Sent: Monday, January 30, 2006 9:22 AM > To: asterisk-users@lists.digium.com > Subject: [Asterisk-Users] DID over analog? > > I've some DID's that I'm using for in-bound faxing, but I'm havingsome> trouble with getting that working perfectly on my T1. So I'm thinkingof> pointing them to an analog line. Will the DID's simply come in overthe> analog, presumably sending the DID digits via DTMF? Or is that not > something that'll work? > > Thanks, > > -KenOne would have to think that fixing the T1 issue is a far better solution, have you tried asking the questions related to the T1 fax problems? Analog DID trunks are problematic at best, and not supported as far as I have seen in asterisk. Most reliable DID trunks are 4 wire, not 2 wire. They require a special DID trunk interface and I have not seen one for asterisk. While there are 2 wire DID trunks form some telcos, they are a joke. ISDN BRI (2B+D) is also a viable solution as multiple numbers can be routed to an ISDN BRI line - call your telco and see if they will do multiple numbers on ISDN and then look at the capi cards for use with asterisk like the DIVA series from EICON. I have no personal experience with them but many others do. Damon
Hello, I agree with Damon's comments below. Just for information. Eicon do have the Diva Server Analog range of cards that will work with asterisk. You can plug these into Analog lines and then use them with Asterisk via the CAPI interface of the Diva Server driver. If you have CLIP (The Caller ID service) on the analog line you can get the calling party number indicated to asterisk. It is also possible to assign a number to each line in the driver, that will be shown as the Called Party Number in Asterisk. However, it would be better to get your T1 working. Thanks David -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of Damon Estep Sent: 30 January 2006 18:27 To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] DID over analog?> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users- > bounces@lists.digium.com] On Behalf Of Ken D'Ambrosio > Sent: Monday, January 30, 2006 9:22 AM > To: asterisk-users@lists.digium.com > Subject: [Asterisk-Users] DID over analog? > > I've some DID's that I'm using for in-bound faxing, but I'm havingsome> trouble with getting that working perfectly on my T1. So I'm thinkingof> pointing them to an analog line. Will the DID's simply come in overthe> analog, presumably sending the DID digits via DTMF? Or is that not > something that'll work? > > Thanks, > > -KenOne would have to think that fixing the T1 issue is a far better solution, have you tried asking the questions related to the T1 fax problems? Analog DID trunks are problematic at best, and not supported as far as I have seen in asterisk. Most reliable DID trunks are 4 wire, not 2 wire. They require a special DID trunk interface and I have not seen one for asterisk. While there are 2 wire DID trunks form some telcos, they are a joke. ISDN BRI (2B+D) is also a viable solution as multiple numbers can be routed to an ISDN BRI line - call your telco and see if they will do multiple numbers on ISDN and then look at the capi cards for use with asterisk like the DIVA series from EICON. I have no personal experience with them but many others do. Damon _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users