If you are using Google's GrandCentral Click2Call service, you will be unable to transmit DTMF tones during the call. GrandCentral responds to DTMF tones, but blocks (strips) those tones so they cannot be sent onto to the recipient. What this means is, if you call an automated system that requires that you transmit, for example, "press 1 for English, press 2 for Spanish", you will be unable to comply. Same thing is true for when you use Click2Call to call any number which requires you to enter DTMF tones in a front end menu such as, "enter the extension of the person you wish to speak to now".

Grandcentral does this intentionally at this time. It is some security thing so their network isn't hijacked to route millions of free automated calls, or something like that. It is not a bug, it is not an Nokia N8xx issue. I use GrandCentral and Gizmo with Click2Call everyday with various hardware here. I have a Sunrocket 6011S (actually several) to place free outgoing calls. When I need to call someplace which requires me to input DTMF tones, I do not use Click2Call, I use another (paid) method to make the call.

When GrandCentral goes live as as a "pay" service, I fully expect the DTMF to function, but then the outgoing calls will no longer be free.

If you ask me, I hope GrandCentral/Google leaves things just as they are for as long as possible. I love it just as it is.....free.

On another note:
Kudos to GizmoProject too.... their Gizmo5 "Backdoor calling" is awesome, and Gizmo service has many many other sweet features. Just recently they (Gizmo) expired my calling minutes because I had not used them all, but an email explaining my dissatisfaction resulted in a credit to me. I got all my minutes back and they didn't even tell me they were restoring them, they just did it. Not bad.

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Nokia N8xx / GrandCentral / GizmoProject = an awesome combination !

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If you need to place a call then transmit DTMF use another manner, but if you place calls where no DTMF is required, you can't beat GC and Gizmo !

M5