Unless you've done some specific configuration on your PBX, I would not expect this to work. When you press transfer you should get dialtone from the PBX. When you dial the extension, the person's phone should start to ring. Unity is not yet involved here. If you dial the #2 immediately after the extension, I imagine the PBX will ignore it.
The most generic way to transfer someone directly to a particular mailbox without ringing an extension is as follows...
- initiate the transfer (press transfer button)
- dial Unity's pilot number (or press a VM button)
- if prompted for password, press *
- if prompted for ID, press #
- at opening greeting dial the extension, immediately followed by #2
- release the transfer (typically by hanging up)
Many phone systems may offer short-cuts to this but they vary from manufacturer to manufacturer. Perhaps someone else can give you hints specific to the Avaya G3.
Regards,
Eric