Make Calls with normal Telephones and change Settings
Start a Query or reserve an Exchange Line
18
Recall on Busy: If you hear a busy tone after dialling an internal or
external telephone number, it may be that the called telephone is cur-
rently busy. If you want to reach the requested call partner without
repeated calling, you can start a Recall on Busy. The necessary tel-
ephone service “Call Completion on Busy Subscriber (CCBS)“ will be
supported by PBX.
If you have started a recall, you will be recalled by the public
exchange (external call)/PBX (internal call) as soon as the other sub-
scriber has finished his current call. If you pick up the receiver then,
the other subscriber will be called by the public exchange/PBX. If this
one also picks up, a conversation will be established. Then the recall
will be deleted in the public exchange/PBX.
Reserve Exchange Line: If you start to hear a busy tone before com-
pletely dialling the telephone number, all exchange lines (1st and
2nd B channel of the available external S
0
ports) are currently busy.
Now you can reserve a line for later.
If you have started an exchange line reservation as described here,
you will be called by the PBX as soon as there is a free line.
If you pick up the receiver during the ringing, you will hear the external
dial tone as a sign of a reservation of the exchange line. Now you
have to dial the external telephone number only and without
Exchange Line Access Number.
Recall on no Reply: If you call an internal telephone, but the called
person does not pick up, you will be able to reach him without repeat-
ing the call by starting a recall in case of no Reply. The function is
possible for internal as well as external calls. The necessary tele-
phone service “Call Completion on No Reply (CCNR)“ will be sup-
ported by PBX.
If you started a recall, you will be called by the public exchange/PBX
as soon as the other subscriber has finished his next call. If you pick
up the receiver then, the other subscriber will be called also by the
public exchange/PBX. If the other one picks up the receiver too, a
conversation will be established. Only then the recall is deleted.
Note: On the system telephone COMfort 1000/1200/2000 plus or
COMfortel 1100/1500/2500/2500 AB/VoIP 2500 AB the “Recall on
Busy“ is started via menu (see manual of the telephone).
A recall is tried up to 45 minutes by the PBX. If the called person did
not finish his call until then, the recall will be deleted automatically.
If you do not pick up the receiver in case of a recall in time (After you
have been called for 20 seconds), the recall will also be cancelled.
If you use an analog telephone as an internal subscriber
telephone and you can start a “Recall on Busy“ via T-Net
function key/menu, you also will be able to use this comfortable oper-
ation (see manual of the telephone). Instead of an announcement of
the public exchange you will hear the acknowledgement tone.
Important: The technical condition for a recall must be given e.g. the
recall to a PBX is not possible with some of the network providers.
Also if using a VoIP account for the external call, no callback is pos-
sible.
Note: On the system telephone COMfort 1000/1200/2000 plus or
COMfortel 1100/1500/2500/2500 AB/VoIP 2500 AB the “Recall on
Busy“ is started via menu (see manual of the telephone).
If you do not hear any confirmation tone, the recall request was
refused by the public exchange.
It may be possible that the public exchange starts the recall before
the subscriber you have called has hanged up because one B chan-
nel of his ISDN connection is free.
A recall is tried up to 45 minutes by the public exchange. If the called
person did not finish his call until then, the recall will be deleted auto-
matically.
If you do not pick up the receiver in case of a recall in time (After you
have been called for 20 seconds), the recall will also be cancelled.
If you use an analog telephone as an internal subscriber
telephone and you can start a “Recall on Busy“ via T-Net
function key/menu, you will also be able to use this comfortable oper-
ation (see manual of the telephone). Instead of an announcement of
the public exchange you will hear the acknowledgement tone.
Start a Query or reserve an Exchange Line
Start Recall on Busy for internal Telephone Call
f F *37# f
a
씮
c
b f
busy tone
acknowledgement tone
Wait
Telephone rings (up
to 20 seconds )
ringing tone
T
Starting Recall on Busy via Public Exchange for external Connection (CCBS)
f F *37# f a
씮
c
b f
busy tone
acknowledge-
ment tone
Wait
Telephone rings (up
to 20 seconds )
ringing tone
T
