I once built a system for a cellphone rental company in Israel, at the time termination to Israel was very expensive, they wanted to provide a local USA DID to ring on the Israeli mobile phone, so they bought a 32 channel 2N 3g gateway, they had a deal with the mobile carrier that they got a couple of thousand minutes per SIM to call any other SIM in the account (they called it VPN minutes) then the customers would call the USA DID which terminated the call through the 3G gateway, they set limits on each SIM how many outgoing minutes it can call, the 3G gateway distributed the calls in round robin until a sim used its allowed minutes. 

So they were able to offer a USA DID to ring to the mobile phone at a very low rate, but the market has changed significantly and its a lot cheaper to terminate the calls via sip trunks, and by doing so the called party also got caller ID.



On Wed, May 10, 2017 at 5:04 PM, Colton Conor <colton.conor@gmail.com> wrote:
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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