Panasonic KX-TDA50

1.25 Networking Features
192 Feature Guide
[Example]
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 Idle Line Access number, adds
the PBX code and Idle Line Access number of PBX-2 "902-9", and sends the number
down the TIE line to PBX-2. The number is now "902-9-12125551234".
2. PBX-2 checks its Incoming Number Modification Table (not shown here). No modification
is programmed. PBX-2 removes its PBX code (902). The number is now "9-
12125551234".
3. PBX-2 recognizes its Idle Line Access number, "9", and sends the remaining number,
"12125551234", to the telephone company using an idle CO line.
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
line group carrying the outgoing call.
When making TIE-to-CO line calls, the incoming TIE line call is received by one CO line of a
PBX, and the outgoing CO line call is made using another CO line. Both lines belong to CO
line groups, and both groups have a Class of Service (COS), therefore, Toll Restriction (TRS)
can be used to allow certain TIE-to-CO line calls to be made while others are prohibited. (→
1.8.1 Toll Restriction (TRS)) These restrictions are based on the COS of the CO line group
carrying the incoming TIE line call.
Additionally, the outgoing CO line group can be programmed to completely block all calls from
being made when incoming TIE line calls are received on CO line groups of a certain COS.
(External Call Block)
Note that it is possible for a PBX user to bypass these restrictions by using Direct Inward
System Access (DISA). By making a TIE line call to a floating extension number used by the
DISA feature of the other PBX, then using Walking COS (→ 1.8.4 Walking COS) or Verified
Code Entry (→ 1.8.5 Verified Code Entry) through DISA, a PBX user can make a call that is
normally restricted, provided his or her COS is authorized to make the call.
[Programming Example: CO Line Group COS, PBX-2]
Dials "9-12125551234"
Outside Party
1-212-555-1234
CO Line
Private Network
Extn. 1001
Telephone
Company
PBX Codes
PBX-1: 901
PBX-2: 902
PBX-2PBX-1
CO Line
Group No.
1
2
COS
No.
3
2