Features
399
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
9. 5. 2 Hold (enquiry call)
An A – B connection is put on hold if one of the callers, e.g. user B wants to set up 
an enquiry call connection with C. 
Fig. 192 Putting a call on hold
Detailed Description
Tab. 182 Hold (enquiry call)
If A is on hold and B hangs up before setting up a ringing or call connection to C, B's 
terminal will ring continuously for 10 seconds. As soon as B picks up the handset, 
he is again connection with A.
If A is on hold and B waits for more than 10 seconds before setting up a ringing or 
call connection to C, B will obtain the busy tone. The return to the initial connection 
is not automatic.
Suffix dialling functions
Tab. 183 Hold (enquiry call): Functions
Interface
Operating sequence / signalling on the ter-
minal
Scope
A Music on hold is played to user A, who is on 
hold
1)
1)
With hold in the public exchange, the signalling depends on the network provider.
Possible interfaces:
internal, external, PISN
C Possible interfaces:
internal, external, PISN
Functions System phones Analogue terminal
Set up internal enquiry call  with or without call prepara-
tion
R <user No.> 
(R = control key) 
Set up enquiry call to a user of the up-circuit 
communication server.
(Requirement: The user’s own communication 
server is analogously connected down-circuit 
and the existing call connection already seizes a 
trunk line to the up-circuit communication 
server) 
via function key with function 
command "I" to seize the line 
(macro "I*42")
R*42 <user No.>