A Private GSM Cell?

mr number two asks: "I live in the mountains and have poor GSM reception. I can buy an active repeater to boost signal strength in my home to good levels, but what I'd really like to do is have a private GSM picocell, such that at home I would be connected to my own PBX. Calls to my home phone number would ring through to my cell phone. I wouldn't have to worry about a home cordless phone (and 802.11 interference) and I'd have all my speed dialing / contacts info right there. There are many other benefits. Ignoring FCC licensing issues, is there a base station I can purchase which has a signalling interface that will interface to a small PBX?"

Comments

Heres a GSM to VOIP gateway

[madstork2000]

This looks like it might be helpful:

http://www.voip-info.org/wiki-VOIP+GSM+Gateways

The site www.voip-info.org itself looked promising during my brief visit....

Re:Heres a GSM to VOIP gateway

[gregmac]

That's backwards from what he's asking for - that essentially acts as a cell phone, and makes it available using VoIP. Effectively, if you had an asterisk box, you could have your cell phone number ring into it or use it to make outbound calls, which would be useful in remote locations with no phone lines, or probably even more useful as an emergency backup in the event regular phone lines go down.

The original question is asking for a way to use his cellphone as an extension on the PBX, so this wouldn't be useful in that situation.

Re:Heres a GSM to VOIP gateway

[Intron]

I think what you want is a cell phone that switches to VOIP when in range of your wi-fi spot. Obviously, the major carriers have little incentive to offer this.

Check with Tessco

[JohnnyGTO]

they seem to sell alot of different equipment. www.tessco.com

Cell, or Network?

[poindextrose]

Administering a wireless telecommunications switch, I have to ask: do you want a network of your own with no ties to other carriers, or just a cell?

If you're looking for a "just you" thing, good luck. The GSM standards are pretty easy to get your hands on, and with a little ingenuity, you could build a GSM switch. It's basically a few DBs and hardware interfaces. That's where things get tricky. GSM cells (which you could easily purchase for $100,000 (CDN)) need to communicate to the switch using a standardized protocol over T1. So you'd have to build THAT network stack over some sort of Frame-Relay-over-T1 interface (which are often rather expensive in and of themselves... also, good luck with Linux drivers...).

I left out the possibility of buying a GSM switch, because I doubt you'd be on Ask Slashdot if you had that kind of cash.

Now I know you said "apart from FCC regulations" or something, but that's what's going to kill you. GSM uses a 200KHz carrier (at least with the 800 and 900 MHz spectrum), and to put a site on the air with any sort of wattage in any location of any use (you are in rough terrain, no? So you'd put in on a peak... and spread your signal pretty far) without interfering with anyone else and without the FCC turning your way is going to be quite tricky.

Re:Cordless Phone interference ?

[Jahf]

-good- 2.4GHz phones (a'la Siemens Gigasets) don't interfere with 802.11b/g/n/whatever.

And 5GHz phones have a tendency to not work as well (for me) through my house due to solid construction.

My microwave interferes with my phone, but neither interferes with my wireless.

Crappy 2.4GHz phones (a'la Panasonic) do, but that doesn't mean they all do.