Mobridge, Bluetooth and PCM

[Poshfpg]

We have a 2005 997 C2S, PCM 2.1 and MF steering wheel, and have got by with the extra SIM and a Dension Gateway 500 for years now. Recently the car is being used for work commutes as well as its original weekend fun role and this is making the phone a real problem. Work requires a lot of conference calls and therefore the ability to mute the line or take other calls while putting the main one on hold. Our 2009 A6 does this seamlessly via the steering wheel but that has to stay at home for ferrying the kids around so we need the 911 to be able to do it.

The obvious route is a bluetooth install and my local independent has recommended the Mobridge, I looked at the Dension BT add on before but Auto Audio refused to install it when they did the Gateway as they said it was useless. Anyway I'm quite happy to install the Mobridge IF it allows call waiting, has a way to mute the line and streams music to more than one speaker. The reviews and manufacturer manuals are a little vague on this which worries me.

In summary, for Mobridge and any other 911 BT system owners:

1. Is there any way to mute the line other than getting the phone out of your pocket?
2. Can it handle call waiting and switching between calls?
3. Does it stream music from your phone to the audio properly?

All information and advice would be greatly appreciated, thanks.