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As the name
implies a Virtual Private Network is an imaginary network
within a real network i.e. it gives the service user the
feeling of in-house connections to any destination, although
the connections are switched by the public network. Such a
VPN service, therefore, enables the subscribers to establish
a private network using resources of public network. VPN
service is best suited for corporates and consortia having
significant traffic between their corporate sites spread in
Delhi and Mumbai (to begin with) to configure and use
switched carrier circuits as if they are their dedicated
private lines.
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Corporates and
others can subscribe to VPN service i.e. they can have their own VPN
network by utilizing the existing telephone lines or by taking new
telephone connections. Telephone connections put on a VPN network
can also be used as a normal telephone connection.
Features and
Facilities
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VPN
subscribers can have practically all facilities of an
electronic PABX without owning it by becoming a member of VPN
and therefore no maintenance hassles inherent to PABX.
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There is no
need for VPN subscribers to take leased lines between their
locations and therefore they are free from problems associated
with leased lines.
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Segregation
of calls between private and official is feasible.
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Individual
lines on the VPN network need not be given STD facility and
hence no problems of its misuse.
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VPN
subscribers can have their own private numbering plan.
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Detailed
billing facility exists in the form of a single bill for calls
made to and from VPN lines.
How to
subscribe
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You can apply on prescribed application form
(available free) along with the registration fee of Rs. 3000/- in the form of DD/Pay order/Crossed
Cheque in favour of MTNL, New Delhi at Gate No-3, Khurshid Lal Bhawan, Janpath, New Delhi 110050.
For further details contact to C.O. (BC-I) on Tel. 011-23320247.
The registration charges are refundable through
adjustments in the bills.
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How
to access and use
Dialing procedure for VPN service depends upon the type of location
from which the service is to be accessed. There are two type of
locations :
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Virtual
on-net location : These locations
(telephone numbers) are defined by the VPN customer to be a part
of their VPN numbering plan. These telephone numbers can be
existing lines or the new telephone connections taken by the VPN
subscriber specifically for VPN services.
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Off-net
location: All telephone numbers which
do not form a part of VPN network are called off-net locations.
Dialing
Procedure
If fast dialing is available, the dialing is to be done in fast-dialing mode only. If it is not available, then press * after
dialing the access code in the following procedures:
1. Within VPN i.e. virtual on-net to virtual on-net.
160111 + Destination PNP no.
PNP refers to Private Numbering Plan
2. From virtual on-net to off-net
160111 + 9 (Escape code) + Destination number + Authentication code.
3. From off-net to virtual on-net
160111 + Group ID + Caller PNP number followed by Authentication code + Destination PNP number
4. From off-net to off-net
160111 + Group ID + Caller PNP number followed by Authentication code + 9 (Escape code) + Destination number
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Virtual
private network (VPN)