Dial Up Solutions

Sun Oct 18 22:38:54 UTC 2015

On Sun, 18 Oct 2015, Clayton Zekelman wrote:

> I didn't think Asterisk had modem DSP and RAS code?!  Huh?

I was surprised to find IAXmodem (http://iaxmodem.sourceforge.net/), which
is "a software modem written in C that uses an IAX channel (commonly
provided by an Asterisk PBX system) instead of a traditional phone line and
uses a DSP library instead of DSP hardware chipsets."

It appears to be limited to 14.4k due to patent issues and handles faxes
only, but its existence suggests writing a software-only data modem should
be possible.

                                     -- Aaron

> At 09:31 PM 17/10/2015, Dovid Bender wrote:
>> You can use Asterisk. All you need a digium/sangom T1/E1 card and a box.
>> 
>> 
>> ------Original Message------
>> From: Will Duquette
>> Sender: NANOG
>> To: nanog at nanog.org
>> ReplyTo: willd at staff.gwi.net
>> Subject: Dial Up Solutions
>> Sent: Oct 16, 2015 15:28
>> 
>> Does anyone have any suggestions on equipment for our ISP that is still
>> supporting dial up customers?
>> 
>> At the moment we are running 3Com Total Control 1000's but are running out
>> of spare parts as we have failures.  Given that this gear is so old trying
>> to source spare parts is proving to be difficult.
>> 
>> We do have access to an Cisco AS5200 but are looking for maybe a SIP based
>> solution that could possibly run on our VM farm?  Has anyone heard of
>> anything like that or does it even exist?
>> 
>> What kind of gear are you running if you still are supporting dial up
>> customers?