1.30.3 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 (® 1.10.1 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]
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
Conditions
• Each BRI/PRI port can be set to public or VPN through system programming. To use this service, select
VPN.
• Even if the telephone company does not support the VPN service, it is possible to use the same kind of
service when making a call by TIE line service programming, and/or Quick Dialling programming (®
1.6.1.6 Quick Dialling).
Feature Guide 335
1.30.3 Virtual Private Network (VPN)
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