Hi,Can anyone please give me instructions on registering SIP spa504g to call manager 8?and advise if this is possible. Thanks

A(avaya/pstn) calls B(cisco) then B transfer to C(cisco) then connect. A encounters dead air instead of ringback as C is not yet answeringthings get weird after trying the following test calls:A(cisco) calls B(cisco) then B transfer to C(cisco) = rin...