Hello, here I use GsmOpen with some modifications.

This work very well in my clients, some of then using with 4, 16, 27, 32 even 64 modens.

There are different user cases.

Some of then are using in ISPs making a Point to Point in rural areas in Brazil.

There are others clients, using in CallCenter, to call clients.

Here there is 4 main operators, VIVO, OI, CLARO, TIM, and client can make portability.

So, the system has a database of all portability. And recognizes when a number is from VIVO, but got portability to CLARO, etc.
The system calls using one of CLARO chips, according with the rules of the routes.

There is another user case, when a company want to give the clients more numbers to receive calls, so client doesn't make expensive calls.

And, there is a lot of user cases more. This is just the main.


The main problem is to manage dongles, because sometimes, with a bad power supply, the modem get down and on (RESET).
So the TTY port can change.

I tried to use GSMOpen to recognize the tty by IMSI, without success.

So I made my own daemon, that load all modems and tty, and using gsmopen reload + XML Curl, I can made changes in FreeSwitch on the fly.

Here is expensive the cost of GSM Gateways.
Some of then are R$ 4000 with 8 ports.
Or R$ 16000 with 32 ports.

Using GSMOpen, I can make a system with 32 modems with only R$ 500.

I have at least 50 companies using this solution.
And ~ 200 companies using my system.

Search in the list for my name, there is a lot of e-mails talking about it.

If you wan't I can give you my patch, there is a lot of corrections.
The main of then are about Thread getting deadlock.






2017-05-11 11:31 GMT-04:00 Deepika Yadav <deepikay@iiitd.ac.in>:
This is for the usecase of community heath worker in rural areas of India who only have access to feature phones i.e. no Internet, no data plan. 

Regards,
Deepika

On Thu, May 11, 2017 at 8:05 PM, Colton Conor <colton.conor@gmail.com> wrote:
What is the value? Mobile voice plans are expensive (realtive to sip trunks). Also, call quality is not even G711 in most cases.

I could see the use case is you wanted a mobile backup with GSM for voice in the case your hardline internet were down, but even then I would think it would be cheaper and more benefical to get a mobile data backup plan, and continue to use the SIP trunks over the internet.

I honestly had now clue these large GSM banks existed.

Anyone used them in North America? 

On Wed, May 10, 2017 at 10:06 AM, David Villasmil <david.villasmil.work@gmail.com> wrote:
I think it's illegal everywhere... but value? there's lots and lots of values, it only depends on where you are doing it... :)
ᐧ

Regards,

David Villasmil

On Wed, May 10, 2017 at 4:12 PM, Raúl Alexis Betancor Santana <rbetancor@gmail.com> wrote:
The only real advantage over a regular SIP trunk from any provider, it's that you could select a plan than MAYBE allow you some sort of flat-rate and not per-minute use plans ... but it doesn't worth the effort and money you have to spend to get that to generate revenue ... also most of celullar carriers withh put some restrictions on the usage of the flat-rate, as all of them have 'fair use' policies.
At least on Spain, it's ilegal to resell that kind of traffic and I asume its the same in most of the world.

2017-05-10 15:04 GMT+01:00 Colton Conor <colton.conor@gmail.com>:
So how does this GSM stuff work in the USA? Would I got buy a cell phone plan from someone like AT&T or T-Mobile, and then insert the SIM into these devices. The device would then covert the audio from GSM to SIP, and then I could use it like a SIP trunk?

What is the advantage of doing this over just buying a pure SIP trunk from an internet provider? 



On Wed, May 10, 2017 at 4:35 AM, David Villasmil <david.villasmil.work@gmail.com> wrote:
There's another chinese brand that has a 32 port, I've used it, works pretty well, i think it's "GoIP" or something.

On Wed, May 10, 2017 at 10:39 AM Bipin Patel <bipin@xbipin.com> wrote:
hi,

we use matrix boxes but 4 port ones, they work quiet well
Regards,
Bipin


-------- Original Message --------
Subject: Re: [Freeswitch-users] Freeswitch PRI support
From: Deepika Yadav <deepikay@iiitd.ac.in>
To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org>
Date: 5/10/2017, 11:02:49 AM
Hi,

I searched some gateways online. The ones available at ebay are cheap, the following link shows a gateway supporting 32 SIMS for $859 :


However, when I contacted a company called "Matrix Telecom Solution", they gave the quote of $4150 for similar number of SIM support. On asking them to compare the two gateways, they said that the one available at ebay is a Chinese gateway about which they are apprehensive for the quality, warranty and working.

Regards,
Deepika


On Fri, May 5, 2017 at 4:58 PM, Raymond <xxxman2008@126.com> wrote:

HI,

Regarding this.  i have  asked some question of  module "GSMOpen".   

In fact ,i want to make Freeswitch box as  "GSM VOIP Gateway"  by using  "gsmopen". But...seems  no one help me . :-(( .   If it worked , can save more money than  hardware gsm voip gateway ( GOIP ).

Raymond



At 2017-05-04 17:24:13, "Giovanni Maruzzelli" <gmaruzz@gmail.com> wrote:
For PRI you use Sangoma or Patton.

But, why don't you use an hardware gateway sip<->gsm?

It would save you very big money.

Check on ebay and google, there are many of them, you put SIMs inside, and you are good to go.

-giovanni


sent from mobile
cell: +39 347 266 56 18
Giovanni Maruzzelli
OpenTelecom.IT

Il 04 mag 2017 11:13, "Deepika Yadav" <deepikay@iiitd.ac.in> ha scritto:
Hi,

I am using Freeswitch in an application that initiates conference calls amongst 20 users in cellular network (mobile phones in GSM network). Currently, for the VOIP-GSM gateway, we are using the service from a company called Doorvaani. 

But, since, the cost of call estimates to be high and we cannot debug the call drops; we are thinking to buy our own PRI card. 

I am seeking recommendation on following points:
  1. Which card should I buy that is most easily configurable with the Freeswitch i.e. company and type. 
  2. Reference on how should I start to make Freeswitch configure with the PRI card and start sending and receiving calls. For the current gateway service in use, I simply put the authentication credentials for the corresponding VOIP line offered by the company Doorvaani in the external SIP Profile. In case of PRI, what all changes are needed?
Regards,
Deepika

--
Regards
Deepika
https://www.iiitd.edu.in/~deepikay/

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--
Regards
Deepika
https://www.iiitd.edu.in/~deepikay/


_________________________________________________________________________
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--
Regards
Deepika
https://www.iiitd.edu.in/~deepikay/

_________________________________________________________________________
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