asterisk users - May 2010 - GoogleTalk to Asterisk - choosing voice menu options

GoogleTalk connects ok to Asterisk 1.6.2.7 but how can you choose
voice menu options (press 1 for Bob, press 2 for Betty, ...) from the
GT client?

(There is no dial pad in the Windows GT client, but what you type in
the message box does show up on the console as an incoming Jabber
message.)

Is there a way? Thanks all!