VoIP and V.150
by chris on Feb.26, 2008, under Work
A particular project I’m currently working on involves the ITU’s V.150.1 specification and a VoIP product. It’s pretty neat. We’re taking something like modem data and using IP to transmit the data.
V.150.1 is one of those protocols that rides on top of UDP. It’s some times referred to as Modem Relay over IP or MoIP. In this scenario it’s up to the end devices transmitting the data to maintain continuity and repetition. V.150 creates the transport using State Signaling Events (SSE) and the SPRT transport layer.
2 comments for this entry:
June 3rd, 2008 on 11:57 am
Hi Chris,
Your project sounds interesting. I ran across you blog while seeking a solution to my problem: My father owns and operates several car washes that have credit card machines at the ingress. These machines have modems to dial out for credit card transactions. One can dial into this same modem to download various accounting reports and sales stats.
My dad asked me to look at some of these reports for him, but I was immediately stuck by the problem that I don’t have an analog phone line! I only use my mobile and Skype, leaving me with no obvious way to dial-up this machine.
After some web searching, I came across MoIP and various products, but I don’t see something that does exactly what I want:
o Via a website or some program on my PC, I indicate the phone number I want to “dial”
o A connection is made to the modem from IP to PSTN via some gateway
o My PC has a window showing the command line session just as if I had dialed in
o I would prefer to not add equipment at the car wash
Doing all this requires that a gateway exist somewhere that is owned by a 3rd party and that I get access to it.
Do you know if any such service exists?
Thanks.
February 9th, 2009 on 7:47 am
Hi Chris,
my company is looking into MoIP as a solution for legacy telcoms. We want to use this together with VoIP on a Linux platform and currently using Asterisk. I can’t find a MoIP solution, other than ISP/telco’s like SURF. Was the project you were working on close to what we require, if so could you get in touch.
regards
Neil Fagan