Agreed, it is difficult enough trying to get modem working between an Audiocodes FXS gateway and an Audiocodes PRI gateway (I did get it to work eventually), let alone trying to do it with a SIP trunk. You can try, but I wouldn't count on the modems ever training up and if they did you would have all kinds of errors in the stream and would be disconnected in short order.
Josh Patten Brazos County Network Engineer 979.361.4676 From: [email protected] [mailto:[email protected]] On Behalf Of Matthew Kitchin (public/usenet) Sent: Tuesday, May 24, 2011 9:04 AM To: [email protected] Subject: Re: [sipx-users] analog/modem support questions Someone is welcome to disagree, but I don't think you will have good luck with this. Faxing can work because there is an actual protocol for it (t38). Trying to send modem data over voice codecs does not work very well. On 5/24/2011 8:43 AM, R. Benjamin Kessler wrote: All - We have a small SIPX system using SIP trunks over the Internet for PSTN access. We have a new requirement to be able to support an analog modem (or two) and I was wondering if anyone has done this with any kind of success already. The modems would be used to dial-up to remote routers, etc. to access device consoles out-of-band so the speed requirements are low (e.g. 9600 baud). If anyone has done this (or something similar) please let me know - I'm interested in details like, ATA(s) used, and any particular tricks that had to be performed to make things work. I realize that I'm asking for something that is sub-optimal, I'm just trying to avoid a monthly charge for a POTS line that may only get used twice a year. Thanks, Ben _______________________________________________ sipx-users mailing list [email protected]<mailto:[email protected]> List Archive: http://list.sipfoundry.org/archive/sipx-users/
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