tirmason Posted October 14, 2008 Report Share Posted October 14, 2008 In the UK it is possible to make cheap calls to mobiles by dialling a 08717549090, waiting for the person to start talking, and then dialling the international number (i.e. sending the outbound number as DTMF tones). Is it possible to route calls to mobiles through this number? Costs are as low as 6p per minute (as opposed to 12p per minute with most SIP providers). Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted October 14, 2008 Report Share Posted October 14, 2008 In the UK it is possible to make cheap calls to mobiles by dialling a 08717549090, waiting for the person to start talking, and then dialling the international number (i.e. sending the outbound number as DTMF tones). Is it possible to route calls to mobiles through this number? Costs are as low as 6p per minute (as opposed to 12p per minute with most SIP providers). Someone mentioned recently that cell phones have a feature that allows to put pause into the address book entries. That was a trick to get it working. The PBX itself does not support two-stage dialling. The first stage SIP is completely different from the second stage which would be DTMF. But some PSTN gateways may be able to perform this task. From the PBX perspective, all it does is dial a SIP URI! Quote Link to comment Share on other sites More sharing options...
JP Chaput Posted March 10, 2011 Report Share Posted March 10, 2011 Someone mentioned recently that cell phones have a feature that allows to put pause into the address book entries. That was a trick to get it working. The PBX itself does not support two-stage dialling. The first stage SIP is completely different from the second stage which would be DTMF. But some PSTN gateways may be able to perform this task. From the PBX perspective, all it does is dial a SIP URI! I was just wondering how to do that. Any chance it would have changed since this answer was posted in 2008? I was thinking about creating a backup Dialplan to route inter-office calls through the PSTN, then to final destination using a pause before sending the extension number as DTMF... is there still no option to do that? Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted March 11, 2011 Report Share Posted March 11, 2011 Well, how should it look like on the PBX? The PBX dials a number on the trunk, then waits until the call gets connected and then starts pumping out DTMF tones? Quote Link to comment Share on other sites More sharing options...
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