Handsets are configured to point to the #SERVERNAME
The port entered on the Go Connect Server
uaCSTA handset are normal SIP handsets that are configured to connect to a uaCSTA server over SIP also. The uaCSTA session is only used for monitor and control the normal SIP accounts. The handset is known by the number of the first working account (the primary).
Handsets need to be configured individually (or via provisioning) to point to the #SERVERNAME