Panasonic KX-TD500 System Reference Manual page 303

3. Call Forwarding (FWD)
3-1.
* 1
* 2
FWD to a non-VPS extension
Ext./CO
(FWD-All/Busy)
Call State
Ringback Tone * 1
Busy Tone * 2
(FWD-No Answer)
Call State
Ringback Tone
(The call is arriving at the Ext.1)
↓
Call Forwarding No Answer Time
has been elapsed.
↓
Ringback Tone
(The call is forwarded to the Ext.2
and arriving on it) * 1
Ringback Tone
(The call is arriving at the Ext.1)
↓
Call Forwarding No Answer Time
has been elapsed.
↓
The call is still arriving at the
Ext.1. * 2
In case of outside calls (DIL 1:1, DISA,DID)
In an incoming outside call is not answered by the extension in a specified time
period (IRNA timer), it will be transferred to another destination. — IRNA
Refer to "6. Intercept Routing No Answer (IRNA)" and "7. IRNA and Station
Hunting" on pages 3-F-52 through 3-F-55 for further information.
The treatment of calls differs depending on the types of calls.
Refer to "5. Treatment of the call forwarded to the busy extension/VPS" on page
3-F-51 for further information.
3-F-43
Forward
Ext.1
FWD mode
Conditions
The Ext.2 is idle.
The Ext.2 is busy.
Conditions
The Ext.2 is idle.
The Ext.2 is busy.
Ext.2