Panasonic KX-TDA50 Features Manual page 187

[Receiving a Call via a TIE Line]
PBX Code Method
(Access with PBX Code)
Does the modified number
contain the PBX code
assigned to this PBX?
Yes
Modifies the number
by removing the PBX code.
The PBX checks the modified number to determine what kind of number it is.
Operator Call No.
Directs the call
to an operator.
Does the
corresponding
extension
exist?
Is the
No
extension idle?
Call Waiting
Busy tone
Intercept Routing
Busy/DND
Calls the extension.
A call is received via a TIE line.
The Incoming Number Modification Table
checks the CO line port carrying the call,
and modifies the number according to the
method assigned for that port.
Does the PBX have
Yes
a PBX code (Own PBX Code)
assigned to it?
No
To
(found in the flowchart,
[Making a Call via a TIE
Line from an Extension])
Extension No. Extension No.
of this PBX of Another PBX
A
To
(found in the
flowchart,
[Making a Call
No
via a TIE Line
from an
Extension])
Yes
Sends a reorder
tone, or sends the
Yes
call to an operator
(Intercept Routing
No Destination).
Extension Number Method
(Access without PBX Code)
A
Idle Line
Access No.
or
CO Line Group
Access No.
PBX checks the Class of Service (COS)
of the incoming CO line group.
Is the outgoing CO line
group programmed to allow
calls from this COS?
Yes
Does
Toll Restriction (TRS) allow
this COS
to make this call?
Yes
Sends the call to the CO line.
1.25 Networking Features
No
Other
Reorder tone.
No
Reorder tone.
No
Reorder tone.
Feature Guide 187