1. Digital Subscriber Access Multiplexer
DSLAM
Digital Subscriber Access Multiplexer

2. Definition
A DSLAM is a Network Device, usually placed at a Telephone Company Central Office, That Receives Signals from multiple customer of DSL Connections and puts the signals on a high-speed backbone line using Multiplexing Techniques.
DSLAM multiplexers connect DSL lines with some combination of Asynchronous Transfer mode (ATM), Frame Relay, or Internet Protocol Networks.
DSLAM enables a phone company to offer business or home users the fastest Phone Line Technology (DSL) with the fastest backbone Network Technology (ATM).

3. DSLAM Application Overview
Multimedia Conference
Video Phone
IP Centrex ……
Voice- ……
Public Phone
DSLAM
WLAN
IAD
xDSL Modem
Home gateway
Multimedia Terminal
Consumer end user/Soho
Business end users

4. DSLAM Evolution NGN DSLAM Evolution Time IP Core + Full-Service=
Full-Service Access Platform
IP Core
DSLAM
ATM Core
DSLAM 1G 2G 3G
Time

5. ATM & IP ATM uplink rate --155Mbit/s
Technology Adopted by DSLAM equipment including: ATM and IP
ATM uplink rate --155Mbit/s
IP uplink rate--100Mbits/s,1000Mbits/s (Ethernet)

6. Differences between ATM DSLAM and IP DSLAM
ATM DSLAM: uplink ATM / Ethernet switch or BAS
IP DSLAM: uplink Ethernet switch or BAS
ATM DSLAM : ATM cell ended on uplink board(if ip uplink)
IP DSLAM: ATM cell ended on subscriber board
ATM DSLAM: internal switch based on ATM
IP DSLAM: internal switch based on IP

7. Example of ZTE Broadband Access Accessories
1G:
ATM Series
Terminal
831/831A/831D/832/852
PURE DSLAM series
CPE series
2G:
IP Series
3G:
FSAP series
ZXDSL8220
Outdoor
732/931/531
ZXDSL 9210
ZXDSL 8203
ZXDSL 9203
ZXDSL 8426
FSAP 9800
Out30 for Big capacity DSLAM
ZXDSL 9426
FSAP 9803
ZXDSL 9806E/A/H
Out50 for medium capacity DSLAM
for mini DSLAM

8. Theory of ADSL PSTN ADSL Modem Splitter DATA Switch DSLAM
ADSL utilizes its special modulation/demodulation hardware to connect with two ends of twisted pair wire. ADSL establishes a tunnel with two channels, as shown in Figure.
One is data channel (transmission to the subscriber end) , the other one is POTS channel . The POTS channel ensures that voice communications can still operate even if the ADSL connection fails. The data channels can be multiplexed to create multiple low-speed paths.
DATA Switch
DSLAM

9. FSAP/DSLAM Family Overview
Large capacity
Medium capacity
Mini capacity

10. Large Capacity 600mm*600mm, 19inch ETSI standard rack -48VDC
Line interface card
32/64L ADSL
48L VDSL
32L SHDSL
EPON/GPON 9U
896L ADSL per Shelf
672L VDSL per Shelf
448L SHDSL per Shelf
14 EPON Interface
8 GPON Interface
1U=1.75 英寸=4.445厘米
ETSI=European Telecommunication Standards Institute, 欧洲电信标准协会
-48VDC
CSC
2/4/6 100M/1000M & 10GE, Uplink Interface
600mm*600mm, 19inch ETSI standard rack

11. Shelf Structure Shelf Height: 9U; Rack Used: 600*600*2200
Subscriber Shelf
Splitter Shelf
Shelf Height: 9U; Rack Used: 600*600*2200
2 Shelves per Rack with Splitter; 3 Shelves per Rack without Splitter

12. Shelf Configuration
Mode 1: Holding subscriber cards without built-in splitters and splitter cards together, implementing broadband data service and narrowband voice service access at the same time.

13. Shelf Configuration
Mode 2: Holding subscriber cards with built-in splitter cards only, implementing broadband data service and narrowband voice service access at the same time.

14. Shelf Configuration

15. Backplane of DSLAM Subscriber shelf supports three backplanes:
MDCA: Supports broad/narrow-band integrated service access
Mechanical support for all cards and works with the control and switch card
MDCE: Supports pure broadband service access
MDCF: Backplane works with the control and switch card to supports larger bandwidth, each slot’s bandwidth reaching up to 4 GE. Provides two 10G interface uplink slots.
Splitter shelf supports only one backplane e.g. MTAN.
MDCA: Supports broad/narrowband integrated service access
Mechanical support for all cards
MDCA backplane works with the control and switch card CSCA/CSCE/CSCM/CSCT.
MDCE: Supports pure broadband service access
works with the control and switch card CSCA/CSCE/CSCM/CSCT
MDCF:MDCF backplane works with the control and switch card MSCT/MSCX.
Supports larger bandwidth, each slot’s bandwidth reaching up to 4 GE. Provides two 10G interface uplink slots.

16. CSC Board Feature
The CSC board resides in slot 9 and 11.The CSC board cannot reside in other slots.
Height: 9U
Core of switching and controlling for the system, providing a series of ports and powerful switching capability on the backplane.
DSLAM can be configured with one single CSC card or dual active/standby CSC cards. When the active and standby CSC cards are running, the standby CSC card performs hot backup for the active CSC card.

17. ATNG CARD Feature
Implementing the conversion between the ATM and the Ethernet
Provide 32 lines of ADSL access for subscribers. The subscriber data
are transferred through PSTN networks.
Built-in splitter
Provide LED indicator, 32 link LED indicators, sockets, and
reset button

18. System Feature Overview
DSLAM can Integrating Data, Voice and Video
Carrier-Class Reliability
Hot-swap of Subscriber Boards
Many Service Interfaces (ADSL/ADSL2/ADSL2+/ SHDSL/ VDSL2/EPON/GPON)
Multicast Feature (MVLAN,CAC,PRV,CDR,IGMP v2)
Full DiffServ Mode QoS for Triple-Play
Multiple Maintenance Modes (CLI, Telnet, SNMP)
CPE Remote Management

19. Base Capacity Features
Supporting 16K MAC ;
Supporting 4K VLANs ;
Supporting 255 ~ 1K IP Multicast Groups ;
Supporting 512 Traffic Classes;
Supporting 128 QoS Policies

20. ZTE FSAP series products application in various distance area
Cascading
CO Mode
Large
Capacity
3km
3km
ZTE FSAP 9800/9803
CASCADING
Medium
Capacity
ZTE FSAP 9806H
ZTE FSAP series products application in various distance area

21. FSAP EPON / GPON Application
Internet
OSS
IPTV
IP NETWORK
10 Km
ADSL
VDSL
FTTX
LAN
DSLAM
1x32
BRAS
OLT
Other Application
ONU
1x16
20 Km