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Introduction
Warn tone
1.1.4.4
Warn tone is provided to indicate an incoming call to the system where
an extension user who would normally be in a position to take the call
cannot because that extension may be:
- programming
- being rung
- setting up an outgoing call.
Note
The CCU regards an outgoing call as being in progress during:
MF signalling - the first 20 seconds following exchange line seizure.
Pulse signalling - the first eight seconds from
pulse.
The warn tone lasts for one second and is not repeated. The external
party is disconnected from the system during the warn tone in order for
the CCU to apply it.
Ringing defaults
1.1.5
At switch-on, when in Keysystem Mode, the CCU sets all extensions to
ring if an incoming call arrives. Individual extensions can be prevented
from ringing by programming them off. The ringer default on is a
mandatory requirement to ensure that incoming calls are indicated when
power is restored after a power failure.
Some ringers can be programmed off for each line and some cannot.
Refer to the following table.
Table 1.1
Incoming ring defaults
Ext. 20
Ext. 21
Ext. 22
Ext. 23
Ext. 24
Ext. 25
Ext. 26
Ext. 27
No = Ringer cannot be programmed off for that line
Yes = Ringer can be programmed off for that line
NI A= Not applicable
1-4
PBX mode
Line 1
Line2
No
No
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
NIA
t}l
e end of each break
EXCL line mode
Keysystem
Line2
Line 1
Line 1
No
Yes
No
Yes
No
NIA
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Line2
NIA
No
NIA
NIA
NIA
NIA
NIA
NIA
TPU 1371Issue3(4/91)
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