On receipt of the first CONNECT message,the network shall stop (if running) timers T301, T303, T304 and T310; complete the circuit-switched path to the selected B-channel; send a CONNECT ACKNOWLEDGE message to the user which first accepted the call; initiate procedures to send a CONNECT message towards the calling user, and enter the active state.
The CONNECT ACKNOWLEDGE message indicates completion of the circuit-switched connection. There is no guarantee of an end-to-end connection until a CONNECT message is received at the calling user.Upon receipt of the CONNECT ACKNOWLEDGE message the user shall stop timer T313and enter the active state.
When timer T313 expires prior to receipt off a CONNECT ACKNOWLEDGE message, the user shall initiate clearing in accordance with 5.3.3.
A user which has received the SETUP via the broadcast data link, and has been awarded the call, shall connect to the B-channel only after it has received the CONNECT ACKNOWLEDGE message. Only the user that is awarded the call will receive the CONNECT ACKNOWLEDGE message.
A user which has received the SETUP via point-to-point data link may connect to the B-channel as soon as channel selection has been completed.