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10/27/15 1
Broadband Components
• Customer Premises Equipment(CPE)
• Digital Subscriber Line Access
Multiplexer (DSLAM)
• LAN Switches: for aggregating DSLAM
• Broadband Remote Access Server
(BRAS)
• RADIUS and LDAP (SSSC)
• Provisioning System
10/27/15 2
Requirement at Customer End
• BSNL’s BFone
• Computer of minimum configuration, with
10/100 Mbps Ethernet Card
• DSL Modem + Splitter
• PPPoE software to be loaded in the Client
• Broadband Account (Username and Password)
10/27/15 3
Brief Functions of DSL Components
• DSL CPEs: At customer premises. On one end it connects
telephone cable coming from exchange via splitter. At the other
end, it connects to PC through Ethernet / USB Port.
• DSLAM: called as DSL Access Multiplexer. It has a built in
splitter which splits voice and data. While voice follows the
normal conventional path through exchange, data is aggregated
and up linked through Ethernet Port (Gigabit Ethernet for 480 port
and Fast Ethernet for lower DSLAM)
• LAN Switch: For aggregating multiple DSLAM and providing a
common uplink to the core
10/27/15 4
CPE
10/27/15 5
Customer Premises Installation
Splitter ADSL
RJ 11 RJ 11
RJ 11
RJ 11
RJ 45
Line
Single User with
Voice and Data
Splitter ADSL
STB
RJ 11 RJ 11
RJ 11 RJ 45 RJ 45
RJ 45
AV Port
Single User with
Voice, Data and Video
Line RJ 11
Splitter ADSL
Switch
Multi user Business
Customer
Line
RJ 11 RJ 11
RJ 11
RJ 45
10/27/15 6
How to connect Multiple Telephones
(1) Phone Socket
(2)&(3) Phone
(4) ,(6)
& (7)
RJ-11 Tel cable
(5) Splitter
(8) Phone Jack
10/27/15 7
highpass
filter
LINEDSL
lowpass
filter
TELE
Functions of A POTS Splitter
Splitter
Separates the 300 Hz to 3500 Hz
voice channel from upstream and
downstream channels
Reduces traffic congestion
Pass voice, dial tone, ringing and
on/off hook signals
Consists of a lowpass filter (LPF) for
POTS and a highpass filter (HPF) for
upstream/downstream channels
Passive device
Contains lighting protection circuitry
10/27/15 8
CPE Installation
• CPE(ADSL MODEM) can be utilized in two
different ways
– 1. Transparent Bridge – In this mode we need to
configure PPPoE in the customer’s PC and modem
simply passes ethernet frames from one side to other
side in transparent fashion. Customer’s PC
authenticates itself with BRAS
– 2. Router Mode- In this mode PPPoE is configured in
modem. Modem authenticates itself to BRAS and gets
IP address. Modem provides different address from its
DHCP server to PC. Modem also performs the NAT
function in this mode.
10/27/15 9
CPE Installation
BRAS
CPE
PPPoE Session
T2 Switch
T1 Switch
BRAS
CPE
PPPoE Session
T2 Switch
T1 Switch
Bridge Mode
DSLA
M
IP Address is allocated
to PC By BRAS
Router ModeIP Address is
allocated to CPE
By BRAS
IP Address is
allocated
to PC By CPE
NAT
DSLA
M
10/27/15 11
Multi User Customer
BRAS
CPE
T2 Switch
T1 Switch
Router Mode
DSLA
M
IP Address is allocated
to PCs By CPE
Multi User Customer
In this mode PPPoE is configured on CPE and only
One session is established between CPE and BRAS.
CPE gets IP Address from BRAS. DHCP in CPE
Allocates IP addresses to machines. In this case all
The machines share the bandwidth allowed for that
Account. CPE has to do NAT also.
Switch
PPPoE Session
NAT
10/27/15 12
DSLAM
10/27/15 13
•Houses a set of ATU-C interfaces.
•Multiplex traffic from multiple ATU-Cs on to a
single, high speed link to the transport
network.
•Demultiplex traffic from the transport
network and assigns it to the correct ATU-C
•Negotiate line speed.
•Splits the voice and data coming through
ADSL line.
DSLAM: Functions
10/27/15 14
DSLAM
 DSLAM is an integrated hardware and
software system that allows the user to
access Broadband services as well as
originate and terminate telephone calls
over the same single pair of copper wires
10/27/15 15
DSLAM
 DSLAM aggregates the subscriber lines
 DSLAM separates Voice and Data of the Subscriber
 Voice is given to the exchange switch
 Data is fed to the IP Network through the LAN Switch
 DSLAMs have been categorized in to 6 types based on no.
of ports (480, 240,120, 64, 32 & 16) provided and planned
for deployment based on the expected demand
10/27/15 16
DSLAM
Two types of DSLAMs have been proposed to address BSNL
requirement.
 SMARTAX MA5300 IP DSLAM
–Large Capacity (480,240,120 Ports)
- Deployed in A1, A2, A3, A4, B1, B2 Cities
 SMARTAX MA5105 IP DSLAM
–Small Capacity (64,32,16 Ports)
- 64 Ports deployed in A1, A2, A3, A4, B1, B2 Cities
- 32 & 16 Ports Deployed in Other Cities
10/27/15 17
Rear view of the M 5105
SLOT0
SLOT1
SLOT2
Uplink board
DC -48V
© GService board
Service board
10/27/15 18
MFCE/MFCS/MFCM
Uplink
Level 3
MA5105
Level 1
MA5105
Level 2
MA5105
Supreme
MA5105
Service board
Service board
MFCE
Service board
Service board
MFCE
Service board
Service board
MFCE/MIFE
Service board
Service board
Subtending connection of the MA5105 FE (100BASE-TX) ports
10/27/15 19
Tier 1 and Tier 2 LAN switches
10/27/15 20
LAN SWITCH
 LAN Switches provide Gigabit Ethernet ( GE )
interfaces and Fast Ethernet ( FE ) interfaces for
connecting internetworking elements such as BRAS,
DSLAMS etc.,
 Tier 1 switches are Gigabit Ethernet Aggregation
switches to which B-RAS and Tier 2 LAN switches are
connected through GE / FE interfaces
 All DSLAMs are aggregated to Tier 2 switches
through FE interfaces except 480 ports DSLAMs are
aggregated through GE interfaces
10/27/15 21
Interfaces
• Gigabit Ethernet – optical
• Fast Ethernet – Optical
• Fast Ethernet – Electrical
• Ethernet – Optical
• Ethernet – Electrical
• Optical Interface Types
– LX – 40 Km range – Available for Tier I to Tier II
– SX – 10 Km range – Available for Tier II to DSLAM
10/27/15 22
Distance Limitations
• Tier I to Tier II
– Dark Fiber – 40 Km
– SDH Transport – Any distance
• Tier I / II LAN Switch to DSLAM
– Dark Fiber – 10 Km
– SDH Transport – Any Distance
10/27/15 23
Functions of TIER I and TIER II switches.
• It act as an interface between DSLAM and
BRAS.
• Management of statistical data.
• Fast forwarding and control of data
packets.
• Capable of unblocked switching.
• Monitoring and fault diagnosis.
• Managing and calculating the route.
10/27/15 24
BRAS (Broad band Remote Access
Server)
10/27/15 25
Functions of BRAS
• Supports termination of DSL customers.
• Allottment of IP address to customer
• Bandwidth control using rate limiting
• Act as an edge router for terminating VPN
traffic.
• Protocols: OSPF, BGP, MP-BGP and LDP
• Supports Lawful interception and monitoring
• AAA function
10/27/15 26
SSSS (Subscriber Service Selection
System.)
 Selection of various range of service.
 This provides on demand service without
manual intervention
 www.dataone.in
10/27/15 27
RADIUS
 This in conjunction with BRAS
 AAA function
10/27/15 28
LDAP (Light Weight Directory
Access Protocol Server)
 It stores customer database viz username,
password and the default services that it can
subscribe to.
10/27/15 29
BRAS Architecture
• Deployed at the edge of the NIB-II
network
• Installed in all the A sites (except
Mumbai). Total 23
• Capacity of 8 Gbps (in A1 sites) and 4
Gbps (in other A sites)
• Can handle 480000 concurrent sessions
(A1 sites)
10/27/15 30
Brief Functions of DSL Components…
contd.
Provisioning: This is the most critical components
for ensuring quick delivery of service. It ensures
end-to-end provisioning of service right from DSL
CPEs to DSLAM to Switch to BRAS to LDAP
10/27/15 31
END

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Broadband

  • 1. 10/27/15 1 Broadband Components • Customer Premises Equipment(CPE) • Digital Subscriber Line Access Multiplexer (DSLAM) • LAN Switches: for aggregating DSLAM • Broadband Remote Access Server (BRAS) • RADIUS and LDAP (SSSC) • Provisioning System
  • 2. 10/27/15 2 Requirement at Customer End • BSNL’s BFone • Computer of minimum configuration, with 10/100 Mbps Ethernet Card • DSL Modem + Splitter • PPPoE software to be loaded in the Client • Broadband Account (Username and Password)
  • 3. 10/27/15 3 Brief Functions of DSL Components • DSL CPEs: At customer premises. On one end it connects telephone cable coming from exchange via splitter. At the other end, it connects to PC through Ethernet / USB Port. • DSLAM: called as DSL Access Multiplexer. It has a built in splitter which splits voice and data. While voice follows the normal conventional path through exchange, data is aggregated and up linked through Ethernet Port (Gigabit Ethernet for 480 port and Fast Ethernet for lower DSLAM) • LAN Switch: For aggregating multiple DSLAM and providing a common uplink to the core
  • 5. 10/27/15 5 Customer Premises Installation Splitter ADSL RJ 11 RJ 11 RJ 11 RJ 11 RJ 45 Line Single User with Voice and Data Splitter ADSL STB RJ 11 RJ 11 RJ 11 RJ 45 RJ 45 RJ 45 AV Port Single User with Voice, Data and Video Line RJ 11 Splitter ADSL Switch Multi user Business Customer Line RJ 11 RJ 11 RJ 11 RJ 45
  • 6. 10/27/15 6 How to connect Multiple Telephones (1) Phone Socket (2)&(3) Phone (4) ,(6) & (7) RJ-11 Tel cable (5) Splitter (8) Phone Jack
  • 7. 10/27/15 7 highpass filter LINEDSL lowpass filter TELE Functions of A POTS Splitter Splitter Separates the 300 Hz to 3500 Hz voice channel from upstream and downstream channels Reduces traffic congestion Pass voice, dial tone, ringing and on/off hook signals Consists of a lowpass filter (LPF) for POTS and a highpass filter (HPF) for upstream/downstream channels Passive device Contains lighting protection circuitry
  • 8. 10/27/15 8 CPE Installation • CPE(ADSL MODEM) can be utilized in two different ways – 1. Transparent Bridge – In this mode we need to configure PPPoE in the customer’s PC and modem simply passes ethernet frames from one side to other side in transparent fashion. Customer’s PC authenticates itself with BRAS – 2. Router Mode- In this mode PPPoE is configured in modem. Modem authenticates itself to BRAS and gets IP address. Modem provides different address from its DHCP server to PC. Modem also performs the NAT function in this mode.
  • 9. 10/27/15 9 CPE Installation BRAS CPE PPPoE Session T2 Switch T1 Switch BRAS CPE PPPoE Session T2 Switch T1 Switch Bridge Mode DSLA M IP Address is allocated to PC By BRAS Router ModeIP Address is allocated to CPE By BRAS IP Address is allocated to PC By CPE NAT DSLA M
  • 10. 10/27/15 11 Multi User Customer BRAS CPE T2 Switch T1 Switch Router Mode DSLA M IP Address is allocated to PCs By CPE Multi User Customer In this mode PPPoE is configured on CPE and only One session is established between CPE and BRAS. CPE gets IP Address from BRAS. DHCP in CPE Allocates IP addresses to machines. In this case all The machines share the bandwidth allowed for that Account. CPE has to do NAT also. Switch PPPoE Session NAT
  • 12. 10/27/15 13 •Houses a set of ATU-C interfaces. •Multiplex traffic from multiple ATU-Cs on to a single, high speed link to the transport network. •Demultiplex traffic from the transport network and assigns it to the correct ATU-C •Negotiate line speed. •Splits the voice and data coming through ADSL line. DSLAM: Functions
  • 13. 10/27/15 14 DSLAM  DSLAM is an integrated hardware and software system that allows the user to access Broadband services as well as originate and terminate telephone calls over the same single pair of copper wires
  • 14. 10/27/15 15 DSLAM  DSLAM aggregates the subscriber lines  DSLAM separates Voice and Data of the Subscriber  Voice is given to the exchange switch  Data is fed to the IP Network through the LAN Switch  DSLAMs have been categorized in to 6 types based on no. of ports (480, 240,120, 64, 32 & 16) provided and planned for deployment based on the expected demand
  • 15. 10/27/15 16 DSLAM Two types of DSLAMs have been proposed to address BSNL requirement.  SMARTAX MA5300 IP DSLAM –Large Capacity (480,240,120 Ports) - Deployed in A1, A2, A3, A4, B1, B2 Cities  SMARTAX MA5105 IP DSLAM –Small Capacity (64,32,16 Ports) - 64 Ports deployed in A1, A2, A3, A4, B1, B2 Cities - 32 & 16 Ports Deployed in Other Cities
  • 16. 10/27/15 17 Rear view of the M 5105 SLOT0 SLOT1 SLOT2 Uplink board DC -48V © GService board Service board
  • 17. 10/27/15 18 MFCE/MFCS/MFCM Uplink Level 3 MA5105 Level 1 MA5105 Level 2 MA5105 Supreme MA5105 Service board Service board MFCE Service board Service board MFCE Service board Service board MFCE/MIFE Service board Service board Subtending connection of the MA5105 FE (100BASE-TX) ports
  • 18. 10/27/15 19 Tier 1 and Tier 2 LAN switches
  • 19. 10/27/15 20 LAN SWITCH  LAN Switches provide Gigabit Ethernet ( GE ) interfaces and Fast Ethernet ( FE ) interfaces for connecting internetworking elements such as BRAS, DSLAMS etc.,  Tier 1 switches are Gigabit Ethernet Aggregation switches to which B-RAS and Tier 2 LAN switches are connected through GE / FE interfaces  All DSLAMs are aggregated to Tier 2 switches through FE interfaces except 480 ports DSLAMs are aggregated through GE interfaces
  • 20. 10/27/15 21 Interfaces • Gigabit Ethernet – optical • Fast Ethernet – Optical • Fast Ethernet – Electrical • Ethernet – Optical • Ethernet – Electrical • Optical Interface Types – LX – 40 Km range – Available for Tier I to Tier II – SX – 10 Km range – Available for Tier II to DSLAM
  • 21. 10/27/15 22 Distance Limitations • Tier I to Tier II – Dark Fiber – 40 Km – SDH Transport – Any distance • Tier I / II LAN Switch to DSLAM – Dark Fiber – 10 Km – SDH Transport – Any Distance
  • 22. 10/27/15 23 Functions of TIER I and TIER II switches. • It act as an interface between DSLAM and BRAS. • Management of statistical data. • Fast forwarding and control of data packets. • Capable of unblocked switching. • Monitoring and fault diagnosis. • Managing and calculating the route.
  • 23. 10/27/15 24 BRAS (Broad band Remote Access Server)
  • 24. 10/27/15 25 Functions of BRAS • Supports termination of DSL customers. • Allottment of IP address to customer • Bandwidth control using rate limiting • Act as an edge router for terminating VPN traffic. • Protocols: OSPF, BGP, MP-BGP and LDP • Supports Lawful interception and monitoring • AAA function
  • 25. 10/27/15 26 SSSS (Subscriber Service Selection System.)  Selection of various range of service.  This provides on demand service without manual intervention  www.dataone.in
  • 26. 10/27/15 27 RADIUS  This in conjunction with BRAS  AAA function
  • 27. 10/27/15 28 LDAP (Light Weight Directory Access Protocol Server)  It stores customer database viz username, password and the default services that it can subscribe to.
  • 28. 10/27/15 29 BRAS Architecture • Deployed at the edge of the NIB-II network • Installed in all the A sites (except Mumbai). Total 23 • Capacity of 8 Gbps (in A1 sites) and 4 Gbps (in other A sites) • Can handle 480000 concurrent sessions (A1 sites)
  • 29. 10/27/15 30 Brief Functions of DSL Components… contd. Provisioning: This is the most critical components for ensuring quick delivery of service. It ensures end-to-end provisioning of service right from DSL CPEs to DSLAM to Switch to BRAS to LDAP

Editor's Notes

  1. The following are the objectives that we have set as a organization.
  2. The following are the objectives that we have set as a organization.