1.3.2 EPABX & VPN II.ppt

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EPABX & VPN

Agenda
• EB Customer Wants
• VPN

Enterprise Customer Needs:
•Complete Reliable Services from One Interface Organization.
•Supply of not only Bandwidth but also Modems / Routers etc.
i.e. Complete Telecom Solutions.
•Secured Network.
•Proactive Monitoring of the customers Network.
•Guaranteed SLA. service level agreement
Different Services / Products and
Customer Needs

Why do they Buy and What is important
to Enterprise Customers:
Why MS Provider MSP Selection Criteria
1. Cost Reduction 1. Customer Service
2. Better availability 2. Technical Support
3. Core / Context 3. Guaranteed SLA
4. Reduce Admin Time 4. Price
5. Single Point of Contact 5. Overall Experience
6. Fast Technology refresh 6. Coverage / Foot Print
7. Performance 7. Reputation in Service
8.Knowledge Transfer 8. Breadth of Service
9. Reduce No. Suppliers 9. Existing Relationships
10.Meet Objectives 10.All Services from One

Different Services / Products
– MPLS VPN multi protocol lable switching
– VSAT service of BSNL very small aparture terminal
– ISDN PRI (Primary Rate Interface)
– MLLN – Managed Leased Line Service
– Domestic Leased Lines Service
– Internet Leased Line (ILL)
– VOIP voice over internet protocol
– Black Berry Services
– 3G Mobile Broadband Device (Data Card)

Different Services / Products
– Free EPABX scheme
– MPLS VPN multi protocol lable switching
– VSAT service of BSNL very small aparture terminal
– ISDN PRI (Primary Rate Interface)
– MLLN – Managed Leased Line Service
– Domestic Leased Lines Service
– Internet Leased Line (ILL)
– VOIP voice over internet protocol
– Black Berry Services
– 3G Mobile Broadband Device (Data Card)

SERVICES PROPOSED TO BE PROVIDED UNDER THE
“BSNL LAST MILE” SERVICES ARE
1) VOICE & DATA SERVICES
2) POINT TO POINT VOICE &DATA BACKHAUL
SERVICES
3) HOT SPOT SERVICES

• SMALL WIRED PBX WITH WI – FI
24 PORTS – with 1 PRI, 2 analogue trunk lines,
1 GSM trunk line, 2 digital extentions & 24 analogue
extentions, one WI-FI access point (in case customer
takes broad band plan
32 PORTS , 48 PORTS, 72 PORTS, 96 PORTS.
IN EACH CASE ONLY ANAGUE EXTENTIONS ARE
CHANGING TO 32,48, 72, OR 96 AS REQUIRED

2) FULL FEATURED VOICE & DATA ENTERPRISE SWITCH
IN COMBINATION OF 100 TO 7000 EXTENTION POINTS
UP TO 96 EXTENTIONS SYSTEM WORKS ON AC
ABOVE 100 LINES IT WORKS ON DC
THEY ARE DIVIDED IN THREE CATAGORIES
1) CATEGORY A – 24,32,48 LINES
2) CATEGORY B – 72,96 LINES
3) CATEGORY C – 100 AND ABOVE LINES

SINGLE BILLED CUSTOMER AND MULTIPLE BILLED
CUSTOMERS tariff structures are different
RENTAL WAIVER DEPENDS ON whether the area is TNF
or what plan subscribers offer. It also depends on
competent authority.
REVENUE SHARE BETWEEN BSNL & FRANCHISEE
CHANGES FROM CONDITION TO CONDITION.

• Backhaul :- the intermediate links between core n/w
or backbone of the n/w and a small sub n/w at the
edge of the entire hierarchical N/W.
• Channel Partners:
• BSNL has decided to deal with Platinum & Gold customers
directly. BSNL executives have been appropriately trained
in enterprise sales.
• System Integrators:
• Many of the Telecom project requirements of customers
consist of a mix of following elements: Hardware,
Software, Bandwidth, Integration

• PBX: A telephone exchange serving a single
organization, having a switchboard and associated
equipment, usually located on the customer's premises;
provides for switching calls between any two extensions
served by the exchange or between any extension and
the national telephone system via a trunk to a central
office. PBXs are also referred to as
• PABX – private automatic branch exchange
• EPABX – electronic private automatic branch exchange

• System components
• The PBX’s internal switching network.
• Microcontroller or microcomputer for arbitrary data processing, control
and logic.
• Logic cards, switching and control cards, power cards and related
devices that facilitate PBX operation.
• Stations or telephone sets, sometimes called lines.
• Outside trunks that deliver signals to &from the PBX.
• Console or switchboard allows the operator to control incoming calls.
• Uninterruptible power supply (UPS) consisting of sensors, power
switches and batteries.
• Interconnecting wiring.
• Cabinets, closets, vaults and other housings.

• Do not disturb (DND)
• Follow-me, also known as find-me: Determines the
routing of incoming calls. The exchange is configured
with a list of numbers for a person. When a call is
received for that person, the exchange routes it to each
number on the list in turn until either the call is
answered or the list is exhausted

• Interactive voice response
• Music on hold
• Night service
• Public address voice paging
• Shared message boxes (where a department can have a
shared voicemail box)
• Voice mail
• Voice message broadcasting
• Welcome Message

• PBX functions
• Functionally, the PBX performs four main call processing duties:
• Establishing connections (circuits) between the telephone sets of
two users (e.g. mapping a dialed number to a physical phone,
ensuring the phone isn't already busy)
• Maintaining such connections as long as the users require them
(i.e. channelling voice signals between the users)
• Disconnecting those connections as per the user's requirement
• Providing information for accounting purposes (e.g. metering
calls)

• Common capabilities include (manufacturers may have a different
name for each capability):
• Auto attendant
• Auto dialing
• Automatic call distributor
• Automated directory services (where callers can be routed to a
given employee by keying or speaking the letters of the employee's
name)
• Automatic ring back
• Call accounting
• Call blocking

• Call forwarding on busy or absence
• Call park
• Call pick-up
• Call transfer
• Call waiting
• Camp-on
• Conference call

• Custom greetings
• Customised Abbreviated dialing (Speed Dialing)
• Busy Override
• Direct Inward Dialing
• Direct Inward System Access (DISA)

• Interface standards
• Interfaces for connecting extensions to a PBX
• POTS (plain old telephone service) - the common two-wire
interface used in most homes. This is cheap and effective, and
allows almost any standard phone to be used as an extension.
• Proprietary - the manufacturer has defined a protocol. One can
only connect the manufacturer's sets to their PBX, but the
benefit is more visible information displayed and/or specific
function buttons.
• DECT - a standard for connecting cordless phones.
• Internet Protocol - For example, H.323 and SIP.

• Interfaces for connecting PBXs to each other
• proprietary protocols - if equipment from several
manufacturers is on site, the use of a standard protocol
is required.
• ISDN PRI - Runs over T1, 23 bearer channels + 1
signalling channel
• Internet Protocol - H.323, SIP and IAX protocols are
IP based solutions which can handle voice and
multimedia (e.g. video) calls.

• Interfaces for connecting PBXs to trunk lines
include:
• standard POTS (plain old telephone service) lines - the
common two-wire interface used in most domestic
homes. This is adequate only for smaller systems, and
can suffer from not being able to detect incoming calls
when trying to make an outbound call.

• ISDN - the most common digital standard for fixed telephony
devices. This can be supplied in either Basic (2 circuit
capacity) or Primary (24 or 30 circuit capacity) versions. Most
medium to large companies would use Primary ISDN circuits
carried on T1 or E1 physical connections.
• RBS (robbed bit signaling) - delivers 24 digital circuits over a
four-wire (T1) interface.
• Internet Protocol - H.323, SIP, MGCP, and Inter-Asterisk
eXchange protocols operate over IP and are supported by
some network providers.

• Interfaces for collecting data from the PBX:
• Serial interface - historically used to print every call
record to a serial printer. Now an application connects
via serial cable to this port.
• Network Port (listen mode) - where an external
application connects to the TCP or UDP port. The PBX
then starts streaming information down to the
application.

• Network port (server mode) - the PBX connects to
another application or buffer.
• File - the PBX generates a file containing the call records
from the PBX.
• The call records from the PBX are called SMDR, CDR, or
CIL. It is possible to use a Voice modem as FXO card.

• Direct Inward Dialing
• Direct Inward Dialing (DID) is a service of a local phone
company (or local exchange carrier) that provides a
block of telephone numbers for calling into a company's
private branch exchange (PBX) system. Using DID, a
company can offer its customers individual phone
numbers for each person or workstation within the
company without requiring a physical line into the PBX
for each possible connection.

• A DID system can be used for fax and voice mail as well as
for live voice connections. Compared to regular PBX service,
DID saves the cost of a switchboard operator, calls go
through faster, and callers feel they are calling a person
rather than a company.
• DID requires that you purchase an ISDN or Digital line and
ask the telephone company to assign a range of numbers.
You then need DID capable equipment at your premises
which consists of BRI, E1 or T1 cards or gateways.
• DID requires provisioning in the exchange .

• Advantages to the Customer
• BSNL’s primary objective in setting up the scheme was
to provide the following advantages to the customer:
• Convergent Solution for Voice & Data (through xDSL)
• No Capital Investments in EPABX

• No Maintenance Costs
• No Recurring Costs apart from Call Charges & Rentals
• No Technological Obsolescence
• Feature transparency across Organisation through Q-Sig
or VoIP
• Video Conferencing Facility through xDSL or PRI
• High Speed Internet Access through xDSL.

• Direct Inwards Dialing Facility to make each extension
behave as a trunk line
• Unlimited Inter Office (Within EPABX extensions) Free
Calls.
• Value Added Service through inter working of LAN & PBX
to provide Personalised Telephony Applications
• Voice mail and CTI Applications.
• Department wise PBX & Subscriber wise billing, if
required.

• Provide a scalable service and flexible to facilitate large-scale
deployment.
• Provide a reliable, amenable and fully managed service,
offering SLA to customers
• Capable of meeting a wide range of customer requirements,
including security, quality of Service (QOS) and any-to-any
connectivity.
• Allow BSNL to introduce additional services such as bandwidth
on demand etc over the same network.
• Conditions & tarriff

VOICE VPN
• Voice Virtual Private Network Services (VPN)
• The VPN service works on the public networks
providing a private numbering plan, a private access to
multiple locations and company call control.
• The VPN service handles outgoing and incoming calls of
mobile and fixed company users in the subscribing
company’s environment: Inside the company, From the
company to outside, From the outside to the company.

• Voice Virtual Private Network service (voice VPN)
• What is true of all VPNs is that they provide connectivity between
two or more places using a previously established, shared network
infrastructure rather than having to deploy new, dedicated hardware
specifically for this purpose.
• Combined voice VPN can be provided for fixed line telephones of
BSNL/MTNL and BSNL mobile.
• Use this service by dialing short codes to have a private network
using public network resources.
• This service brings down telephone bills due to special package tariff
for calls within VPN.
• 11 digit number 1801-XYZ-ABCD

VPN Network Architecture

• Related terms with VPN
• Group: This entity defines the private network of a
subscribing enterprise.
• Site: This entity means the company site geographical
location, which is managed by a Telecom Manager of a
subscribing enterprise. It includes a set of VPN users
sharing the same private numbering plan.
• Member Class: This entity defines the user profile,
which includes common characteristics associated to a
set of users’ lines.

• Member: This entity defines a VPN user (e.g., name,
private number and lines), managed only at the SMP
level.
• Member Line: This entity refers to the definition of
characteristics related to a VPN user’s line (a fixed phone
or a mobile phone).
• Service provider: a fixed operator and/or a mobile
operator, which operates network and VPN system (i.e.,
including both the IN platform & VPN application) to
provide network access and VPN availability.

• Subscribers: subscribing enterprises, which deploy
their VPN thanks to the VPN service.
• Telecom Manager: in a given subscribing enterprise,
there is a dedicated person – called Telecom Manager
(TM) which is in charge of the definition and the
management of VPN.

• In the VPN of a VPN subscriber, thanks to a dedicated
PNP, the employees (VPN users) make and receive calls
easily.All calls of a subscribing enterprise are handled by
the VPN service applying discriminations and controls
defined by the telecom manager.
• End-users: the employees of a subscribing enterprise,
which access the VPN service for business
communication.

VPN Network Definition

VPN Call Processing- Access to VPN Service

• Indirect access
• A given VPN user has to dial a dedicated SAC to invoke
the VPN service.
• This access mode concerns mainly VPN users connected
to a fixed LEX which has not the capability to trigger the
VPN service by means of a subscriber mark. The VPN
services for incoming and outgoing calls are available for
VPN users with the indirect access mode (i.e.,calls from
outside the company can not be handled by the VPN
service for VPN users).

• Remote access
• Making the feature National/International Remote
Access available for fixed VPN users, two dedicated
Service Access Numbers (SAN) have to be allocated in
the network to invoke the VPN service in a transit
exchange. Fixed VPN users dial a dedicated SAN to
access the VPN service in a remote access situation.

• Voice Virtual Private Network service for
• Good for institutions, Government departments and
businesses.
• All type of companies, distributors, firms, institutions,
housing society etc
• What BSNL Offers to Voice Virtual Private
Network subscribers?
• Translation of multiple private numbers to one public
directory number mechanism

• Multi-site Organization - Many sites belonging to one
single VPN Network where the site can be located at different
physical location in the world.
• Short Group Numbers - public directory nos. which are not
a part of VPN Network but are given a short number which is
defined at Company level. This feature is optional for VPN
subscribing companies .Group short numbers can be defined
in the Private Numbering Plan (PNP) at the company
level.VPN users from different sites can access those short
numbers by just dialing the numbers.

• Date & Time Screening – Date and time slices for
incoming/ outgoing calls where VPN users are allowed to
make/receive calls.
• Exception List - The lists which contain the numbers
which are not allowed for incoming & outgoing calls.
• Call Duration Control – Threshold can be set for
accumulated incoming/outgoing calls.

• Multiple Account Codes - This feature allows the company
users of a given VPN group to mark their calls according to
business so that subscribing companies receive a bill, which
details the cost of communication according to the company
activities and the company organization
• Dual Invoicing - This is the ability to bill calls made by a
given company member either on the corporate account or
on the VPN member personal account.
• Call Forwarding from one VPN number to another

• Hunting List – A series of numbers may be defined in Hunting list
for incoming calls per VPN user. The aim of Hunting List (HL) is to
manage the reachability of a VPN user by defining a list of numbers,
which can be called to reach the VPN user.This feature allows to
route incoming calls according to a sequential examination of the
numbers in the Hunting List.It is activated either for company
incoming calls or for incoming calls from outside the company when
a VPN user is busy, does not reply, or is not reachable.
• Substitution: This feature allows mobility of VPN user in their
company by providing the VPN access from handset of any other
VPN user of that group.

• Preferred External Destination (PED) - If there exists a number
which is not a part of VPN Network but is frequently called then it
can be defined as PED in the network at a particular site.This
feature allows a subscribing company to integrate non VPN lines as
external preferred destinations (e.g., partnership, suppliers,
customers) by defining PED numbers in the private numbering plan
of the site as the extensions for VPN users. It is the evolution of the
existing feature called “Abbreviated dialing – ABD”, implemented
from the previous version of VPN.
•

• On-net call: A given VPN user makes a call by dialing
the private number or a PED number to call another VPN
user in the same company:
• Off-net call: A given VPN user makes a call by dialing
an escape code followed by a public directory number to
call someone outside the company:

• Forced On-net: This feature enables to charge a
communication based on a public directory number as a
company call.A given VPN user makes a call by dialing the
escape code followed by a public directory number to call
someone outside the company. If the number dialed belongs
to the PNP of the company (i.e., the number of a given VPN
user or a number in the PED), the call is charged as an on-net
call or as a virtual on-net call.
•

• Virtual on-net: A given VPN user makes a call by dialing a PED
number to call someone outside the company: By default a call
based on a PED number is qualified as an off-net call. The
service provider has to qualify a call explicitly as a virtual on-net
call.
• No call charges for management functions.
• Incoming call: A fixed or mobile extension of given company
can receive calls from any network extension (i.e., from inside
and from outside the company). When a given VPN user
receives calls, which are handled by the VPN service, some
features related to the incoming services can be activated.

• Explicit and default destination: This feature allows a
given VPN user to call another VPN user by indicating the
called line. Thus, according to the line code used, the call is
routed directly to the concerned called line. If no line code is
dialed, the default destination is used to route the call.
• Authorized types of calls: This feature makes cost control
by granting rights to members on outgoing and incoming
calls. The Telecom Manager defines restrictions on types of
calls at the member class level (i.e., Company calls,
international calls, etc.).

• IN call forwarding: Call forwarding is the routing
feature managed dynamically by a given VPN user when
he wants to specify an alternative destination to reach
him.
• Call Forwarding Unconditional overruling: This
feature allows some calling parties to overrule the Call
Forwarding Unconditional (CFU) in order to call a given
VPN user directly.

• This incoming service is useful for a VPN user who want
to authorize some privileged people (e.g., the secretary,
a family member) to call him directly for some urgent
corporate or personal reasons.
• Charging based on location: This feature provides
an advanced billing system based on the location
information of calling and called parties from a mobile
network and the coverage area of their site.
•

• Announcement to an external calling party: The
equipment used for user interactions is the Digital
Announcement Machine (DAM) or the Specialized Resource
Point (SRP) through the INAP CS-1 network interface in local
mode.
• Enhanced private numbering plan: The VPN service
integrates both the mobile and fixed communication means of
VPN users into the corporate Telecommunication system:
mobile handsets, fixed single lines and PABX ranges. The VPN
service provides an enhanced PNP to implement a VPN in a
company. Each site owns its PNP.

• Dual invoicing: This feature allows to bill calls made by
a given company member either on the corporate
account or on the VPN member personal account. The
aim of this feature is to allow subscribing companies to
optimize their communication budget by separating calls
related to personal purposes from calls related to
business purposes. If a given call is considered as a
personal call, the personal account is marked in a CDR;
when considered as a business call, it is marked in a
CDR with the corporate account.

• Authentication: The authentication allows a secured
access to the VPN service from an access which is not
usually associated to a given VPN user. The
authentication is activated:
• - In a dynamical dual invoicing situation,
• - in a remote access situation,
• - in a substitution situation.
• It requires user interactions to validate the information
given by a VPN user. Over three attempts, the access to
the VPN service is blocked.

• Substitution: This feature allows to enhance the
mobility of VPN users in their company to provide an
access to the VPN service from any handset of another
VPN user of their Group.
• The tariff of Voice Virtual Private Network Service

1.3.2 EPABX & VPN II.ppt

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1.3.2 EPABX & VPN II.ppt