I need to broadcast a phone call to a meeting.
I need
1 The person to be able to address the meeting through the public address system.
2 the participants in the meeting to be able to ask questions of the person who is on the phone.

I have managed to get a connection which will allow me to connect the phone to the Public address system however this connection does not have a microphone. I need a connection which can allow me to connect the microphone of the public address system into the phone. preferred type of connection is 3.5mm jack. however I am open to all suggestions.

The key factor is that I have to use a mobile/ cellular phone. I have got a connector which can put the output from the phone into the pa system, however This connector does not allow me to connect a microphone to the phone.

The product which I have can be viewed at

http://www.sourcingmap.com/35m...
Another example of a similar product can be viewed at

http://www.datakits.co.uk/stor...

Both these products contain built in microphones, which don?t pickup very well.

Here is an example of what I want to achieve if this helps.
The meeting I want to broadcast would have a roving mike and people on the floor would put questions and after the question session the person on the other end of the phone line would answer the questions, with their voice broadcast through the pa system to the whole room. This system would also be used for out door events