Voice calls from USB dongle?
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From: Theo Markettos on 21 May 2010 17:50 Are there any USB dongles that are capable of making GSM calls? The reason I ask is I was recently using a Huawei B220 router. This looks like it's a wireless router with an E220 USB dongle built into it... there's a USB port you can use to plug it into a PC and if you do it appears just like an E220 (even the E220 unlock method works). But the router also has a phone socket on the back, which you can use to make and receive calls using the dongle's mobile SIM (GSM calls, not VOIP). So it looks like the E220 is capable of making calls... but how do you achieve this? I didn't take the router apart, but I assume there must be some kind of connection to the dongle for the audio and some PSTN components. Is there some kind of interface for doing this on any dongles, either in hardware or software? Theo
From: Steve Terry on 21 May 2010 21:40 "Theo Markettos" <theom+news(a)chiark.greenend.org.uk> wrote in message news:W5t*caC-s(a)news.chiark.greenend.org.uk... > Are there any USB dongles that are capable of making GSM calls? > > Yes, they are called tethered data phones. I'm using a tethered S2 on Three network to send this from my laptop Steve Terry -- Welcome Sign-up Bonus of �1 when you signup free at: http://www.topcashback.co.uk/ref/G4WWK
From: R. Mark Clayton on 22 May 2010 14:38 "Theo Markettos" <theom+news(a)chiark.greenend.org.uk> wrote in message news:W5t*caC-s(a)news.chiark.greenend.org.uk... > Are there any USB dongles that are capable of making GSM calls? > > The reason I ask is I was recently using a Huawei B220 router. This looks > like it's a wireless router with an E220 USB dongle built into it... > there's > a USB port you can use to plug it into a PC and if you do it appears just > like an E220 (even the E220 unlock method works). But the router also has > a > phone socket on the back, which you can use to make and receive calls > using > the dongle's mobile SIM (GSM calls, not VOIP). > > So it looks like the E220 is capable of making calls... but how do you > achieve this? I didn't take the router apart, but I assume there must be > some kind of connection to the dongle for the audio and some PSTN > components. > > Is there some kind of interface for doing this on any dongles, either in > hardware or software? > > Theo Of course - it is just net data. Depending on your T&C your SP might cut you off for running voice (VOIP / SIP) traffic. QoS of Voip over 3G is poor (but bearable otherwise 3 would not be promoting Skype).
From: Theo Markettos on 22 May 2010 19:22 Steve Terry <gfourwwk(a)tesco.net> wrote: > "Theo Markettos" <theom+news(a)chiark.greenend.org.uk> wrote in message > news:W5t*caC-s(a)news.chiark.greenend.org.uk... > > Are there any USB dongles that are capable of making GSM calls? > > > Yes, they are called tethered data phones. OK... and can they make voice calls[*] initiated from the PC? With the audio fed to/from the PC? There's a Bluetooth interface to Asterisk, so I suppose it's possible. My interest is for Android x86, where you run it on a PC. Obviously voice calling doesn't work[+], because there's no radio. The driver stack shows a pathway for voice traffic which completely bypasses the usual data route (Linux kernel PPP, TCP/IP stack). So I wondered if there was a common interface for making voice calls, and what hardware might use it? Can you buy this hardware for a PC, or do you have to be a mobile phone to have it? Does it already exist on USB dongles, which after all already have much of the baseband functionality? I'm not sure if Android can use another phone over Bluetooth for calling... after all, Android's intended for running on the device with the GSM radio not on a headset. Theo [*] GSM voice calls, VOIP doesn't count [+] There's a SIP client, Sipdroid, that might implement VOIP calling a level low enough to provide a calling pathway for testing, but it doesn't work on Android x86
From: R. Mark Clayton on 23 May 2010 07:29 "Peter" <occassionally-confused(a)nospam.co.uk> wrote in message news:10cgv5lb06tuo2qjve4sv3doj435oupchr(a)4ax.com... > > "R. Mark Clayton" <nospamclayton(a)btinternet.com> wrote > >>QoS of Voip over 3G is poor (but bearable otherwise 3 would not be >>promoting >>Skype). > > I have never tried this but does it ever make economic sense to run > VOIP over 3G ? Yes - if your contract or data add on is large or unlimited then there is no marginal cost for Voip over 3G. Usually such contracts have a large inclusive call allowance, however the big gains will be made in the following circumstances: - 1. Calls from UK to international. Such calls are rarely bundled and usually very expensive. 2. Calls to SIP. Essentially free. > > I can see it may make sense to do it within some kind of a free data > allowance, which exists only on contracts anyway, and on contracts you > tend to get a free call allowance. You would have to be pretty on the > ball on the data usage, using VOIP only up to the data allowance, and > how easy is it to keep tabs on the data allowance *as measured by the > network* (not as measured by the dial-up software) ? A BT inclusive 3G dongle includes 1Gb a month. Even at full ISDN rates both ways that is over two hours talking. In reality it will be a lot more than that.
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