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1.28 Networking Features
266 Feature Guide
1.28.2 Virtual Private Network (VPN)
Description
Virtual Private Network (VPN) is a service provided by the telephone company. It uses an
existing line as if it were a private line. There is no need to set up a private line or to lease a
line from the telephone company. Making and receiving both public and private calls is possible
using the same line.
Public/Private Discrimination:
a) When making a call: The public/private discrimination number is required before
sending the dialled number to the telephone company. The public/private
discrimination number can be dialled manually, or automatically by ARS programming
( 1.9.1 Automatic Route Selection (ARS)) and/or TIE line service programming.
b) When receiving a call: The telephone company distinguishes the call type. If it is a
private call, the call is received by the TIE line service method. If it is a public call, the
call is received by the Incoming Trunk Call Distribution method (DIL/DDI/MSN) which
is assigned on the trunk.
[Example]
Conditions
• Each trunk has its service type: public, private, or VPN. Select VPN to use this service
through system programming.
Head
Office
Extn. 201 Extn. 202
Extn. 301 Extn. 302
(DDI No.:
01-45-6789)
Extn. 401 Extn. 402
01-23-4567
VPN
Public ISDN
Dials "401".
(TIE)
Dials "9-01-23-4567".
(ARS)
Dials
"01-45-6789"
.
Branch
Office
Public Call
Note:
Private Call
<Public
Discrimination>
9-0-01-23-4567
Public No.
<Private
Discrimination>
113-401
Private No.
PBX-2
Branch
Office
PBX Code 111
PBX Code 112
PBX Code 113
PBX-3PBX-1