UKVoIPTalk.com

I was playing with outbound calls on voipcheap.com using the Twinkle
softphone. I noticed a problem to several destinations (UK and abroad)...
if I dial out with voipcheap to a PSTN line and the PSTN user hangs up,
voipcheap/twinkle doesn't notice.

For a test I rang my BT line. I got bored waiting more than 7 minutes but
Twinkle still hadn't disconnected. VOIPcheap's billing says the call ended
after 3.5 minutes, even though I hung up after 5 seconds, and indeed I can
pick up the line 1/2/3 mins after hangup and there's still a call in
progress (which then takes longer to clear because I've picked up).

This is a big deal when calling an expensive destination because I'm billed
for the time after hangup. As I was planning to automate dialling out with
Asterisk there won't be someone there to notice the callee's hung up.

Is this a voipcheap problem, a softphone problem, or something I can
rectify in my Asterisk setup? Is this something I'm likely to see on all
telephone networks or only some? Does GSM handle it differently, for
example?

Thanks
Theo

Theo Markettos wrote:
[color=blue]
> Is this a voipcheap problem, a softphone problem, or something I can
> rectify in my Asterisk setup?[/color]

No.
[color=blue]
> Is this something I'm likely to see on all
> telephone networks or only some?[/color]

It seems to be standard on all landline phone systems.

[color=blue]
> Does GSM handle it differently, for
> example?[/color]

Sort of.

Iain

On 11 5 , 10 59 , Theo Markettos <theom+n...@chiark.greenend.org.uk>
wrote:[color=blue]
> I was playing with outbound calls on voipcheap.com using the Twinkle
> softphone. I noticed a problem to several destinations (UK and abroad)...
> if I dial out with voipcheap to a PSTN line and the PSTN user hangs up,
> voipcheap/twinkle doesn't notice.[/color]


it is because the termination to those destinations don't support
disconnection supervision. they must use the analogue gateway for
termination. It is a key feature on the fxo gateway. it should not
happen when use E1 gateway.

Leon

MSN:
[email]sale1@telecomchinasourcing.com[/email]

[email]liuzhaoyongxx@gmail.com[/email] wrote:[color=blue]
> it is because the termination to those destinations don't support
> disconnection supervision. they must use the analogue gateway for
> termination. It is a key feature on the fxo gateway. it should not
> happen when use E1 gateway.[/color]

Thanks, that's interesting. Does that mean if I call any analogue system
it'll suffer from this problem, but a digital system (GSM/ISDN/VOIP?) won't?
So there's nothing I can control about selecting whoever I choose to
terminate it: it depends on the destination network?

Theo