Ok, I am happy to report of limited success. Not sure if I can test if the situation I am trying to address works.
Ianobi,
Dialing the first number from either phone does use GV to dial out on sp2. As you correctly suspected, using the other phone for another outgoing call, does use the GV second channel, so CC is still unused. However, to test the 3rd call, as per your suggestion, I tried to use AA to route an incoming call from my cell# to make an outgoing call through CC but AA does not recognize my cell# keypress of 2 to allow me to make the 3rd outgoing call.
When I logged into CC website, in each of those instances, the cell# call was shown as an incoming call hence my assertion that it was limited success. What do I do to make AA recognize my cell# keypress so that I can really test it out?
Thanks,
Hiranmoy