Aastra 400 Series System Manual page 376

Features
• B makes a CFU to C.
• A calls B, communication server sets up direct connection with C, C rings.
• The user group will become active irrespective of the configuration of the Wait
for connection parameter.
• If user B is busy, A obtains the busy tone.
Digital network interface with DDI number to user + KT and user + KT
busy
Fig. 182 DDI number to user + KT and user + KT busy
• B makes a CFU to C.
• A calls B, communication server sets up direct connection with C, C rings.
• The KT terminals with the line key also ring.
• If KT line is busy and C is busy, A obtains the busy tone.
• If C is busy, the KT line will ring. A obtains ring-back tone.
376
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013