1. Mini project on
Broadband Access Technologies
DEPARTMENT OF
ELECTRONICS
AND
COMMUNICATION ENGINEERING
M. Satish 09P31A0486

2. What is Broadband?
As per DOT:
Broadband is an “An always-on data
connection that is able to support
interactive services, and has the capability
of minimum download speed of 256 kbps”
Note: This definition for throughput may
undergo upward changes in the future.

3. Existing Internet Service
Categorized as Narrowband Service:
 Dial up Internet Service (PSTN + ISDN)
 Direct Internet Access Service (DIAS)
 Internet Leased Line Service

4. BROADBAND ACCESS:
Broadband communications technology
can be divided broadly into
wireline technologies
wireless technologies.

5. Wire line & Wire less
 3G Mobile
 DSL (Digital Sub’s  Wi-Fi (Wireless
Fidelity) ,
Line)
 Wi-max (World wide
 Cable Modem interoperability for
 Optical Fibre microwave access)
Technologies  LMDS (Local multi
PON, FTTH, FTTB, point distribution
system.)
FTTC
 MMDS
 PLC (Power Line  FSO (Free Space
Communication) Optics)
 Satellite

6. DSL Technology
 DSL may offer more than 100 times the network
performance of a traditional analog modem
 DSL uses the same telephone line as traditional
modem
 Provides simultaneous access to Web &
Telephone removing the need for a second
telephone line.
 DSL remains always-on all the time
 Customer no longer need to physically dial up
to the ISP to “log in to the internet”
 On power failure, telephone line is still available
like a standard telephone line.

7. DSL Family
Tree
 DSL
 Symmetric DSL
 Provide identical data rates upstream & downstream
 Asymmetric DSL
 Provide relatively lower rates upstream but higher rates
downstream
ADSL is upgraded as:
ADSL 2
ADSL 2+

8. ADSL FEATURES :
Family Description Upsteream Down Max.
Rate stream range
Rate
ADSL G,992.1 / G.DMT 640 KBps 8 MBps 5.5 Km Jun
e
199
9
ADSL2 G.992.3 / G.dmt 1-1.5 MBps 12-16 5.7 Km July
MBps 200
2
ADSL2 + G.992.5 / ADSL 2 plus 1 MBps 25 MBps 5.7 Km May
200
3

9. ADSL Deployment
Today
Home/Office Curb Central Office
ADSL
CPE
ADSL up to 5Km Data switch
Splitter 2 wire
SHDSL (PAM16) up to 5Km DSLAM
POTS
2 wire
SHDSL
Voice Switch

10. Advantages of Broadband
 Always on ( Not on shared media)
 Fast (speed ranging from 256 kbps)
 No disconnection
 No additional access charge
 Telephone and Data simultaneously

11. Multiplay Network Components
 BNG – Broadband Network Gateway
 RPR – Resilient Packet Ring
 OC LAN – Other City Local Area Network
 DSLAM – Digital Subscriber Line Access
Multiplexer
 CPE –Customer Premises Equipment

12. Broadband Multiplay – A1 & A2
Cities
NOC, DRNOC, RPOP

13. Broadband Multiplay – OC Type
Cities

14. Services available through Broadband
• High speed Internet Access: This is the always-on Internet
access service with speed ranging from 256 kbps to 24 Mbps.
• Bandwidth on Demand: This will facilitate customer to
change bandwidth as per his / her requirement. For example a
customer with 256 kbps can change to 1 Mbps during the
video Conferencing session.
• Multicasting: This is to provide video multicast services,
video-on-demand etc. for application in distance education,
telemedicine etc.
• Dial VPN Service: This service allows remote users to access
their private network securely over the NIB-II infrastructure.

15. Services on IPTV
• Live TV
– Broadcasted Programs; support for multicast video delivery.
• Time shifted TV
– Schedule less television;
– Allows current or previously broadcasted programs any time
• Near VoD (N-VOD)
– Channels are created, scheduled and run by the operator in staggered
manner.
– Staggered channels are played at certain delay from original channel.
– A subscriber purchases a “ticket” and can access all the channels
running the same movie in multicast. The channels are so phased that
by pressing “FF” or “RW” the subscirber can switch the channels and
skip number of minutes back or forth giving him a near VOD
experience.

16. ERROR
S:
-Error 678
-Error 691
-Error 769
-Error 797
-Error 718
-Error 630-633

17. Error 678
• This is most common problems.
• It is due to poor connectivity.
• Problem can be anywhere between B.RAS - Tier 2 - DSLAM -
Modem - PC of the customer.
• Remedy:
• Switch off / Switch on Modem (Power Switch at the back of
modem ) and wait for 2 minutes. Then retry.
• If problem is not solved then Reset Modem
• If problem is still not solved then
a)If DSL lamp is blinking, then it is line problem.
b)Check Modem to splitter connectivity.
i) Jack in & Jack out the cable of / to the modem and to
the splitter
ii)Jack in & Jack out the telephone connection of the
splitter.

18. Error 691
• User id and Password problem.
• Broadband Team will reset the password and intimate that
password has been reset.
Error 769
• LAN not enabled.
• Remedy: The LAN Card has to be enabled by
following the steps given below.
i)Go to Desktop.
ii)Click "My Network Place".
iii)Select Properties.
iv)Click "Enable the local network".

19. Error 797
• Modem or LAN driver problem
• Reset the Modem (in on condition )
• If the problem is not solved then check computer LAN
Card driver.
Error
•718 Hour - This problem occurs if loading is high on
Peak
the system and number of customers exceed the call
handling capacity of B.RAS.
Error 630-
633 LAN Card problem.
• Computer
• LAN Card has to be changed.

20. Important Do's and Don’ts for BSNL
Broadband customers
• Do's
• 1. No phone/Fax should be connected before splitter.
• 2. Change your password regularly
• 3. Check your usages detail regularly.
• 4. Please clean your computer virus regularly.
• 5. Please switch off modem when not in use.
• Don’ts:
• Please do not disclose your broadband User ID and
Password to anybody.

21. Any
Queries?