I regularly forward my Vonage service to my cell phone, and from there
> my cell phone transfers the call invoice voicemail. Callers can enter
> their phone numbers to get a call back, this function works fine.
> I also check my own voicemail through the forwarding loop sometimes
> (If I'm traveling in Texas I can dial my Texas virtual number as a
> local call, rather then calling long distance to my cellphone's number > in Calgary.)
Both of these instances have the DTMF travelling in the opposite direction than the situation I'm dealing with.
I'm placing an inbound call to a Vonage number that's been forwarded, and expecting DTMF back from the recipient. As the caller, however, I can generate DTMF to the recipient just fine.