TIE Line Features
Features Guide 385
Routing Procedure 3: Routing Flow Chart (2)
Analyzing digits sent from the
other PBX.
Does the leading 3 digits
of
the
received digits match your
PBX Code?
Is your PBX's CO access code
or extension number included
in the received digits?
Is there a CO access code of
your PBX in the received dig-
its?
Is "Trunk to Trunk
Restriction" of the selected
Trunk Group set to "Yes"?
Sends reorder tone.
Is it an extension number of
other PBX's?
Is there your PBX's extension
number in the received digits?
Does that extension actually
exist?
Calling to the specified
extension.
Trunk Group for making an
outgoing TIE call is decided
by a Routing Table.
Is "Trunk to Trunk
Restriction" of the selected
Trunk Group set to "Yes"?
Sends reorder tone.
Calling to CO.
Sends reorder tone.
Sends digits
received from one
PBX to another.
Is it idle?
Sends busy
tone.
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
