Operating Instructions and Installation Instructions

Call-back on Busy (CCBS) on the ISDN Line

When you dial a number and it is busy, you can enable the

“call-back on busy” feature. As soon as the line is free,

your telephone rings for 20 seconds, as it would for an ex-

ternal call. When you pick up your handset, the number of

desired party will be dialed automatically.

“Call-back on busy” can be used for both external and in-

ternal connections.

A maximum of five call-back requests can be enabled for

each extension at any given time.

Accepting or Rejecting Waiting Calls

R2 To accept a waiting call, dial the sequence

shown at left. Your original call is now on hold.

R1 To return to your original connection, dial the se-

quence shown at left. You can also accept the

waiting call by hanging up your existing connec-

tion, i.e., by hanging up the handset. In this case

the telephone rings as soon as you have hung

up. Pick up the handset again to accept the wait-

ing call.

R0 To reject a waiting call, dial the sequence shown

at left.

Call-back on Busy (CCBS)

M You have just dialed a number and now you hear

the busy signal.

5 If the call is not answered, within twenty sec-

onds, dial either the number 5

Rs37r the sequence shown at left.

Q Wait for the acknowledgement tone.

O Hang up the handset.

K As soon as the subscriber you dialed hangs up,

your telephone will ring.

N Pick up the handset. The subscriber’s number is

dialed again automatically.