Broadband
Content
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
4/1/2014 1
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)
4/1/2014 2
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
4/1/2014 3
CPE
4/1/2014
4
Customer Premises Installation
Line RJ 11 Splitter RJ 11 RJ 11 RJ 11 Line ADSL RJ 45 RJ 11 RJ 11 Splitter RJ 11 RJ 45 RJ 11 ADSL
RJ 45
Single User with Voice and Data Line RJ 11 RJ 11 RJ 11
Single User with Voice, Data and Video
RJ 45 STB AV Port
Splitter
ADSL RJ 45
Switch
Multi user Business 4/1/2014 Customer
5
How to connect Multiple Telephones
(1)
Phone Socket
(2)&(3) Phone
(4) ,(6) & (7)
(5)
4/1/2014
RJ-11 Tel cable
Splitter Phone Jack
6
(8)
Functions of A POTS Splitter
DSL
highpass filter
LINE
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
4/1/2014
lowpass filter
TELE
7
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.
4/1/2014 8
CPE Installation
IP Address is allocated to PC By BRAS
Bridge Mode
CPE
DSLAM
T2 Switch T1 Switch PPPoE Session
BRAS
IP Address is allocated to CPE By BRAS
CPE
DSLAM
Router Mode
NAT
IP Address is allocated to PC By CPE
T2 Switch T1 Switch PPPoE Session
BRAS
4/1/2014
9
Multi User Customer
Router Mode
NAT
CPE
DSLAM
T2 Switch
T1 Switch
BRAS
Switch
PPPoE Session
Multi User Customer
IP Address is allocated to PCs By CPE
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.
4/1/2014
11
DSLAM
4/1/2014
12
DSLAM: Functions
•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 4/1/2014 ADSL line.
13
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
4/1/2014
14
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
4/1/2014
15
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 - 4/1/2014 32 & 16 Ports Deployed in Other Cities
16
Rear view of the M 5105
SLOT0
SLOT1
Uplink board
SLOT2
Service board Service board
DC -48V
©G
4/1/2014
17
Uplink
Supreme MA5105
MFCE/MFCS/MFCM
Service board Service board
Level 1 MA5105
MFCE
Service board Service board
Level 2 MA5105
MFCE
Service board Service board
Level 3 MA5105
MFCE/MIFE
Service board Service board
Subtending connection of the MA5105 FE (100BASE-TX) ports
4/1/2014
18
Tier 1 and Tier 2 LAN switches
4/1/2014
19
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
4/1/2014
20
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
4/1/2014 21
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
4/1/2014
22
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.
4/1/2014 23
BRAS (Broad band Remote Access Server)
4/1/2014
24
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
4/1/2014 25
SSSS (Subscriber Service Selection System.)
Selection of various range of service.
This provides on demand service without manual intervention www.dataone.in
4/1/2014
26
RADIUS
This in conjunction with BRAS
AAA function
4/1/2014
27
LDAP (Light Weight Directory Access Protocol Server)
It stores customer database viz username, password and the default services that it can subscribe to.
4/1/2014
28
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)
4/1/2014 29
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
4/1/2014
30
END
4/1/2014 31
• 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
4/1/2014 1
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)
4/1/2014 2
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
4/1/2014 3
CPE
4/1/2014
4
Customer Premises Installation
Line RJ 11 Splitter RJ 11 RJ 11 RJ 11 Line ADSL RJ 45 RJ 11 RJ 11 Splitter RJ 11 RJ 45 RJ 11 ADSL
RJ 45
Single User with Voice and Data Line RJ 11 RJ 11 RJ 11
Single User with Voice, Data and Video
RJ 45 STB AV Port
Splitter
ADSL RJ 45
Switch
Multi user Business 4/1/2014 Customer
5
How to connect Multiple Telephones
(1)
Phone Socket
(2)&(3) Phone
(4) ,(6) & (7)
(5)
4/1/2014
RJ-11 Tel cable
Splitter Phone Jack
6
(8)
Functions of A POTS Splitter
DSL
highpass filter
LINE
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
4/1/2014
lowpass filter
TELE
7
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.
4/1/2014 8
CPE Installation
IP Address is allocated to PC By BRAS
Bridge Mode
CPE
DSLAM
T2 Switch T1 Switch PPPoE Session
BRAS
IP Address is allocated to CPE By BRAS
CPE
DSLAM
Router Mode
NAT
IP Address is allocated to PC By CPE
T2 Switch T1 Switch PPPoE Session
BRAS
4/1/2014
9
Multi User Customer
Router Mode
NAT
CPE
DSLAM
T2 Switch
T1 Switch
BRAS
Switch
PPPoE Session
Multi User Customer
IP Address is allocated to PCs By CPE
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.
4/1/2014
11
DSLAM
4/1/2014
12
DSLAM: Functions
•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 4/1/2014 ADSL line.
13
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
4/1/2014
14
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
4/1/2014
15
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 - 4/1/2014 32 & 16 Ports Deployed in Other Cities
16
Rear view of the M 5105
SLOT0
SLOT1
Uplink board
SLOT2
Service board Service board
DC -48V
©G
4/1/2014
17
Uplink
Supreme MA5105
MFCE/MFCS/MFCM
Service board Service board
Level 1 MA5105
MFCE
Service board Service board
Level 2 MA5105
MFCE
Service board Service board
Level 3 MA5105
MFCE/MIFE
Service board Service board
Subtending connection of the MA5105 FE (100BASE-TX) ports
4/1/2014
18
Tier 1 and Tier 2 LAN switches
4/1/2014
19
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
4/1/2014
20
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
4/1/2014 21
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
4/1/2014
22
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.
4/1/2014 23
BRAS (Broad band Remote Access Server)
4/1/2014
24
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
4/1/2014 25
SSSS (Subscriber Service Selection System.)
Selection of various range of service.
This provides on demand service without manual intervention www.dataone.in
4/1/2014
26
RADIUS
This in conjunction with BRAS
AAA function
4/1/2014
27
LDAP (Light Weight Directory Access Protocol Server)
It stores customer database viz username, password and the default services that it can subscribe to.
4/1/2014
28
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)
4/1/2014 29
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
4/1/2014
30
END
4/1/2014 31
