Panasonic KX-TDA50 Features Manual page 201

Explanation:
PBX-1 makes a call.
Extension 1001 dials the TIE Line Access number "7" and the Idle Line Access number of
PBX-2 "9", followed by the telephone number "1-212-555-1234".
1.
The TIE Line Access number was dialed, therefore PBX-1 checks its TIE Line Routing
and Modification Table (not shown here). Finds leading number "9". No modification is
programmed.
2.
PBX-1 removes the TIE Line Access number and sends the remaining digits down the
TIE line. The number is now "9-12125551234".
PBX-2 receives the call.
1.
PBX-2 checks its Incoming Number Modification Table (not shown here). No modification
is programmed. The number is still "9-12125551234".
2.
PBX-2 recognizes its Idle Line Access number, "9", and sends the remaining number,
"12125551234", to the telephone company using an idle CO line.
b)
TIE-to-CO Line Calls Routed by ARS
ARS can be used to route calls through other PBXs. This allows PBX users to dial telephone
numbers as they normally would (i.e., by dialing the Idle Line Access number "9" then the
telephone number) without having to think about which calls will be routed through another
PBX via TIE line, and which calls will be sent to a CO line connecting their PBX to the
telephone company.
[Example]
Extn. 1001
Dials "9-12125551234"
Explanation:
Extension 1001 dials the Idle Line Access number of PBX-1 "9", followed by the telephone
number "1-212-555-1234".
1.
The Idle Line Access number "9" was dialed, therefore PBX-1 modifies the dialed number
via its ARS programming (not shown here). It removes the first digit "9", adds the Idle Line
Access number of PBX-2 "9", and sends the number down the TIE line to PBX-2. The
number is now "9-12125551234".
2.
PBX-2 checks its Incoming Number Modification Table (not shown here). No modification
is programmed. The number is still "9-12125551234".
3.
PBX-2 recognizes its Idle Line Access number "9", so it sends the call to the outside party
"1-212-555-1234".
c)
Blocking TIE-to-CO Line Calls
TIE-to-CO line calls can be prohibited based on the telephone number of the outside party that
the extension user is trying to make a call to, or can be blocked completely based on the CO
Private Network
PBX-1
CO Line
Telephone
Company
1.25 Networking Features
PBX-2
Outside Party
1-212-555-1234
Feature Guide 201