System Functions and Features as of I7.9
132
Routing elements
sy
d-
020
0/3.
0
– I7.
9
– 1
1
.2009
Substitution Circuit
The first call is answered by the manager personally; a second simultaneous call
will ring on the deputy manager’s set; the third call will ring in the secretary; the
fourth caller will obtain "busy". The calls can be visually signalled everywhere im-
mediately. Acoustic signalling takes place after a delay.
Fig. 55
Substitution circuit with key telephones
Other Subjects Relating to Key Telephones:
Terminals, Internal traffic, Incoming traffic, Outgoing traffic, User-related
features.
Call distribution 1
Direct dialling plan 1
DDI No. 20
-> Call distribution 1
222 22 20
-> KT
Secretariat Deputy manager
Manager
1/1
1/2
1/3
haz0724aaenb0
200
200
250