<broadbandera@gmail.com> wrote in message
news:1153595732.936752.133370@75g2000cwc.googlegro ups.com...
> VoIP Phone works like a mobile phone - no PC is required!
>snip<
> In fact,you can make calls wherever you have Internet
> access.
....except that quite a few free hotspots abroad have only a low bit rate
(specifically I know of Czech republic), so the Wi-Fi VoIP phone will have
rather poor quality speech connection, I would have thought.
divoch
"divoch" <divoch@REMOVETHIShotmail.com> wrote in message
news:fd0xg.59666$Z61.22642@newsfe4-win.ntli.net...
>
> <broadbandera@gmail.com> wrote in message
> news:1153595732.936752.133370@75g2000cwc.googlegro ups.com...
>> VoIP Phone works like a mobile phone - no PC is required!
>>snip<
>> In fact,you can make calls wherever you have Internet
>> access.
>
> ...except that quite a few free hotspots abroad have only a low bit rate
> (specifically I know of Czech republic), so the Wi-Fi VoIP phone will have
> rather poor quality speech connection, I would have thought.
> divoch
>
>
It would have to be a seriously low bit rate not to match 32kbit/s ADPCM!
"R. Mark Clayton" <nospamclayton@btinternet.com> wrote in message
news:rIadnVLuGqYqM1nZnZ2dnUVZ8tydnZ2d@bt.com...
>
> "divoch" <divoch@REMOVETHIShotmail.com> wrote in message
> news:fd0xg.59666$Z61.22642@newsfe4-win.ntli.net...
>>
>> <broadbandera@gmail.com> wrote in message
>> news:1153595732.936752.133370@75g2000cwc.googlegro ups.com...
>>> VoIP Phone works like a mobile phone - no PC is required!
>>>snip<
>>> In fact,you can make calls wherever you have Internet
>>> access.
>>
>> ...except that quite a few free hotspots abroad have only a low bit rate
>> (specifically I know of Czech republic), so the Wi-Fi VoIP phone will
>> have rather poor quality speech connection, I would have thought.
>> divoch
>>
>>
>
> It would have to be a seriously low bit rate not to match 32kbit/s ADPCM!
As far as I know it is just 64kbits/s, not much more than the old dial-up.
Is that
really adequate?
divoch
"divoch" <divoch@REMOVETHIShotmail.com> wrote in message
>>
>> It would have to be a seriously low bit rate not to match 32kbit/s ADPCM!
> As far as I know it is just 64kbits/s, not much more than the old dial-up.
Exactly the same as ISDN / ITU No.7.
> Is that really adequate?
Well telephone is not exactly high fidelity, but that is plenty for voice.
As the analogue loop is taken out, quality should be better and noise
significantly less than on PSTN. The only caveat is if the bandwidth is
contended then you may get latency and contnuity problems.
"R. Mark Clayton" <nospamclayton@btinternet.com> wrote in message
news:AaqdncnP9taXe1nZnZ2dnUVZ8qKdnZ2d@bt.com...
>
> "divoch" <divoch@REMOVETHIShotmail.com> wrote in message
>>>
>>> It would have to be a seriously low bit rate not to match 32kbit/s
>>> ADPCM!
>> As far as I know it is just 64kbits/s, not much more than the old
>> dial-up.
>
> Exactly the same as ISDN / ITU No.7.
>
>> Is that really adequate?
>
> Well telephone is not exactly high fidelity, but that is plenty for voice.
> As the analogue loop is taken out, quality should be better and noise
> significantly less than on PSTN. The only caveat is if the bandwidth is
> contended then you may get latency and contnuity problems.
Isn't that exactly what the problem with this otherwise adequate speed might
be ?
As it is a public hotspot it is likely, is it not, that the bandwidth will
be contended?
divoch
> "R. Mark Clayton" <nospamclayton@btinternet.com> wrote in message
> news:rIadnVLuGqYqM1nZnZ2dnUVZ8tydnZ2d@bt.com...
>> "divoch" <divoch@REMOVETHIShotmail.com> wrote in message
>> news:fd0xg.59666$Z61.22642@newsfe4-win.ntli.net...
>>> ...except that quite a few free hotspots abroad have only a low bit
>>> rate (specifically I know of Czech republic), so the Wi-Fi VoIP phone
>>> will have rather poor quality speech connection, I would have thought.
>> It would have to be a seriously low bit rate not to match 32kbit/s ADPCM!
> As far as I know it is just 64kbits/s, not much more than the old dial-up.
> Is that really adequate?
If your handset supported a compressed codec [eg speex, g.729, GSM] and
no-one else was using the hotspot at the same time as you, you should be
OK. Don't bet on either of those two, however! I would have thought the
main issue with hotspotting would be that hotspots may or may not allow
outbound connections on anything other than port 80/25/110/the usual.
--
<http://ale.cx/> (AIM:troffasky) (UnSoEsNpEaTm@ale.cx)
17:30:47 up 21:04, 3 users, load average: 1.05, 1.08, 1.16
This is my BOOOOOOOOOOOOOOOOOOOOOMSTICK
"alexd" <look@my.sig> wrote in message news:2808337.uX82WGWQ04@ale.cx...
> divoch wrote:
>
>> "R. Mark Clayton" <nospamclayton@btinternet.com> wrote in message
>> news:rIadnVLuGqYqM1nZnZ2dnUVZ8tydnZ2d@bt.com...
>
>>> "divoch" <divoch@REMOVETHIShotmail.com> wrote in message
>>> news:fd0xg.59666$Z61.22642@newsfe4-win.ntli.net...
>
>>>> ...except that quite a few free hotspots abroad have only a low bit
>>>> rate (specifically I know of Czech republic), so the Wi-Fi VoIP phone
>>>> will have rather poor quality speech connection, I would have thought.
>
>>> It would have to be a seriously low bit rate not to match 32kbit/s
>>> ADPCM!
>
>> As far as I know it is just 64kbits/s, not much more than the old
>> dial-up.
>> Is that really adequate?
>
> If your handset supported a compressed codec [eg speex, g.729, GSM] and
> no-one else was using the hotspot at the same time as you, you should be
> OK. Don't bet on either of those two, however! I would have thought the
> main issue with hotspotting would be that hotspots may or may not allow
> outbound connections on anything other than port 80/25/110/the usual.
There is also the issue of A-Law / Mu-Law conversion depending where in the
world you are or does the phone deal with that?
>
> --
> <http://ale.cx/> (AIM:troffasky) (UnSoEsNpEaTm@ale.cx)
> 17:30:47 up 21:04, 3 users, load average: 1.05, 1.08, 1.16
> This is my BOOOOOOOOOOOOOOOOOOOOOMSTICK
>
Re: Wi-Fi phones, any good? 
Linear Mode
