"Call back" service working OK?

#1
I'm in Oz, and wanted to use the Call Back service to save international mobile costs, using the Oz pay-as-you-go mobile SIM card I picked up.

The SMS Call Back service works fine, but the other one (where you ring a Voipfone number, get a busy tone, then get an autoomatic callback with a dialtone) doesn't.

When enter a UK mobile number at the dialtone, I get a message saying the number is not in service. When I enter a UK landline number, I get no message - the call is just terminated. I'm entering only the number, not hitting "call" at the end, as per the instructions.

This callback method is better, as it doesn't even incur a text message charge ... so I'd prefer to use it if possible.

#2
This can be due to bad audio quality and some international networks don't convert the dtmf very well. When you hear the dial tone enter the first number from the number you are dialing and listen and you should hear the dial tone drop off - if you don't you will need to enter again.

We are looking for a work around for this and we will let you know as soon as we come up with something
Regards,

Voipfone Customer Services

iNet Telecoms Ltd (Voipfone)
Sovereign House
227 Marsh Wall
London
E14 9SD
United Kingdom

Registered number: 05168033
Vat Registration Number 858850966

Telephone: 020 7043 5555
Fax: 020 7043 5556

Web: http://www.voipfone.co.uk
Blog: http://www.voipfoneblog.co.uk
Forum: http://www.voipfoneuserforum.co.uk
Twitter: http://www.twitter.com/voipfone

#3
David just out of interest is your phone pay as you go or contract?

We are just about to launch a new service for contract phone users so watch this space
Regards,

Voipfone Customer Services

iNet Telecoms Ltd (Voipfone)
Sovereign House
227 Marsh Wall
London
E14 9SD
United Kingdom

Registered number: 05168033
Vat Registration Number 858850966

Telephone: 020 7043 5555
Fax: 020 7043 5556

Web: http://www.voipfone.co.uk
Blog: http://www.voipfoneblog.co.uk
Forum: http://www.voipfoneuserforum.co.uk
Twitter: http://www.twitter.com/voipfone

#5
This seems to happen if you even half-hesitate while dialling; any pause is treated as the end of the dialled number, which is then too short and invalid. Try again a bit more quickly.

#6
I've verified that it does seem to be down to DTMF transmission. The dial tone only disappears if I hold down the first digit for several seconds.

I've tried doing long key presses for all numbers, but it still fails. I guess that the DTMF transmission is just too flaky from Oz.

I'll have to fallback to the SMS callback, which works quite nicely.

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