User`s guide

1(3)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 A
364/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
SEA/EBBMP T.Preissner
SEA/EBBMP ASB 150 02
SEA/EBBX/E
NETWORKING -
VPN SERVICE FROM PSTN
Definition / Use
There are two possibilities to build up a private
network:
• Using a private network, based on leased lines
from the PSTN. The leased lines are paid for
regardless of the capacity that is used.
• Using the Virtual Private Network service (VPN)
from the PSTN, it is possible to build up a private
network without having permanent connections
to the different locations.
The VPN service has all members of the network
stored in a central database and builds up the
connection between the different locations on re-
quest through the public network.
The customer has the advantages of a private
network while paying only for the capacity and
services used.
The VPN service in the public network (market-
dependent) offers customers the service that all
extensions of their network, even if located in different
locations, can be reached via one common public
subscriber number.
Only the extension number defines where the desired
person is located, because the extension number will
be translated into the real public destination number by
the VPN service from the PSTN.
The VPN service from the PSTN enables the
customers to create a coordinated number plan within
the network by offering the possibility to mix the
numbers between the different locations (see the
drawing below). Called extension numbers which are
not located in the home exchange will automatically
seize a free trunk/route defined for VPN calls, and
handed over to the VPN services from the PSTN which
initiate the routing to the desired extension number.
364.fm
Database reference
VPN
ASB
150 02
4736
5446
ASB
150 02
5478
6080
ASB
150 02
6108 6134
ASB
150 02
5477 6106
ext.no. public subscriber no.
4736
5477
5478
5446
6080
6106
6108
6134
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