1.25 Networking Features
Feature Guide 193
[Programming Example: External Call Block, PBX-2]
[Example of TIE-to-CO Line Call, Blocked/Restricted Based on COS]
Explanations:
TIE-to-CO Line Call Blocked by External Call Block
Extension 1001 dials a number to make a TIE-to-CO line call.
1. The call is received at PBX-2 on CO line group 1, which has a COS of 3.
2. According to the TIE Line Routing and Modification Table of PBX-2 (not shown here), the
CO line call should be made using CO line group 3, however, this CO line group is set to
block COS 3 calls.
TIE-to-CO Line Call Restricted by TRS
Extension 1001 dials a number to make a TIE-to-CO line call.
1. The call is received at PBX-2 on CO line group 1, which has a COS of 3.
2. TRS programming for PBX-2 (not shown here) prohibits the call from being made based
on the COS of CO line group 1.
COS of
Incoming
CO Line
Group
COS 1
COS 2
COS 3
CO Line
Group 1
Block
CO Line
Group 3
Block
Block
CO Line
Group 64
Block
Block
CO Line Group of Outgoing Calls
...
CO Line
Group 2
Block
Block
Block
Makes a TIE-to-CO line call
Outside Party
CO Line Grp. 1
(COS: 3)
CO Line
Grp. 3
Private Network
Extn. 1001
Telephone
Company
PBX-2PBX-1
PBX Codes
PBX-1: 901
PBX-2: 902
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