an idea for an experienced developer(with GSM backround)

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satphoneguy
Posts: 131
Joined: Tue Oct 23, 2007 12:54 pm

an idea for an experienced developer(with GSM backround)

Post by satphoneguy » Fri Dec 21, 2007 5:08 pm

here is the US t-mobile has been offering what they call 'hot spot @ home.' it is a UMA based solution that allows users with the right handsets(WiFi and UMA enabled) to make calls via the interent on any open WiFi handset instead of using GSM towers. there is speculation that this technology could become widespread among GSM carrriers around the world improving indoor coverage.

the idea i have is for an alternative to a GSM gateway that is quite expensive and relies on the line of sight to cell towers in order to allow in network calling via an IP PBX. the idea is to create a software based virtual GSM phone that operates solely via UMA. you would have the SIM card inserted in a card reader and everything else would be software based. ideally this would be seamlessly intergrated as a SIP trunk on a PBX without requiring any GSM gateway hardware. this could also be ideall for deploying an SMS gateway using GSM sims for access to the global SMS network.

today this would allow the rapid deployment and expansion of a gateway services that allows in network(and therefore free) calls to be bridged to any outbound SIP service and vise versa. as more networks adopt UMA it could get really interesting. of course to be really interesting more operators would have to follow the lead of t-mobile USA.

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TheFug
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Joined: Sat Oct 06, 2007 8:23 am
Location: The Netherlands, North-Holland

Re: an idea for an experienced developer(with GSM backround)

Post by TheFug » Mon Dec 24, 2007 10:38 pm

satphoneguy wrote:here is the US t-mobile has been offering what they call 'hot spot @ home.' it is a UMA based solution that allows users with the right handsets(WiFi and UMA enabled) to make calls via the interent on any open WiFi handset instead of using GSM towers. there is speculation that this technology could become widespread among GSM carrriers around the world improving indoor coverage.

the idea i have is for an alternative to a GSM gateway that is quite expensive
huh ? you mean in-expensive
satphoneguy wrote: and relies on the line of sight to cell towers in order to allow in network calling via an IP PBX. the idea is to create a software based virtual GSM phone that operates solely via UMA.
What's an UMA ? you should explain that...
satphoneguy wrote:
you would have the SIM card inserted in a card reader and everything else would be software based. ideally this would be seamlessly intergrated as a SIP trunk on a PBX without requiring any GSM gateway hardware. this could also be ideall for deploying an SMS gateway using GSM sims for access to the global SMS network.

today this would allow the rapid deployment and expansion of a gateway services that allows in network(and therefore free) calls to be bridged to any outbound SIP service and vise versa. as more networks adopt UMA it could get really interesting. of course to be really interesting more operators would have to follow the lead of t-mobile USA.
I've got the iPAQ514,(smartphone) = WiFi+VoIP you should also do some testing yourself... most of these deviceses, have unstable software, because of the new technology, and VoIP is also new :(
Thanks, The Fug.

gear: my ISP's Zyxel Modem/Router in bridge, Sitecom WL309 Router, Siemens Gigaset 301D

satphoneguy
Posts: 131
Joined: Tue Oct 23, 2007 12:54 pm

Post by satphoneguy » Tue Dec 25, 2007 12:13 am

UMA is a technology that allows GSM phone to continue operating via WiFi connection back to the opetrator either when they lose sight of a cell tower or in order to provide an improved connection. it is a similar idea to a pico cell but does not require additional investment in base station equipment or licencing. it tends to be much more interesting here in the US than in most of europe due to the incomplete(as in large areas of no coverage) nature of the cell phine networks here.

as far as i am aware the only UMA that has ever been depolyed is from t-mobile USA; but it has promise.

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