ADSL Cable Modem T09010001 T09010003 T09010007 T09010053
Cable World Cable Modem Cable Modem Cable Modem
Cable World- 110/220 V Electrical Signal 60/50 Hz Channel 2 55 MHz Satellite Frequency IF 5-54 MHz Microwave Above 1 GHz InfraRed Visible Light Ultra Violet X-Rays Gamma Rays What We Need 5 -- 860 MHz -Down Stream (DS) Cable company to subscriber DOCSIS => 91-860 MHz,EuroDOCSIS => 108-860 MHz RF Radio Frequency, : (ELF) (VLF 50-60Hz ) (LF) ( VHF UHF ) RF 300GHz (mm) -Up Stream (US) Subscriber to Cable company DOCSIS => 5-42 MHz,EuroDOCSIS => 5-65 MHz IF Internmediate Frequency,
Analog Video Program Digital Program/Data Amplitude dbmv 0-10 Pictures Color Subcarrier Sound -20-30 Downstream QAM Data -40-50 6MHz / NTSC 6MHz / NTSC 6MHz / NTSC 8MHz / PAL,SECAM 8MHz / PAL,SECAM 8MHz / PAL,SECAM 3 Channels Frequency MHz
Std / IRC HRC( Std/IRC 1.25 MHz) Japan. Europe China. NTSC (6 MHz) PAL/SECAM (8 MHz) Harmonic Related Carrier (HRC) Incremental Related Carrier (IRC) or Standard (STD)
:
STS SDH
Cable Data Network Architecture
Regional Cable Headend
For Home PC CMTS Router Switch Content Data Base Proxy Server Application HFC Splitter HPF Cable Modem Data-interface (Ethernet / USB ) : connect the computer and the cable modem High Pass Filter (HPF)
Cable Modem-
BPI
Cable Modem Termination System(Cable Modem ),, Cable Modem. QAM (64QAM,256QAM) QAM (QPSK,16QAM) Packetizeing => MPEG2 Packet ------- MAC Packet
DHCP Server TFTP Server Time Server
SNMP SNMP RFC 1157 SNMP UDP(,RFC 768) port 161 SNMP extension agent DLL MIBs( )
Cable Modem (1) - RF Cable Ethernet Cable Cable Modem Hub/Switch Ethernet Cable CPE : max 15 CMs PC1 PC2 PC3 PC4 PC5 PC14 PC15 IP assigned by DHCP Server at the head end CM => One IP CPE => 15 IPs at most. (Default CPE number = 1) CPE number is controlled by MSO.
(2) - RF Cable Cable Modem Ethernet Cable Router / NAT Hub/Switch #1 Hub/Switch #2 Hub/Switch #N Ethernet Wiring PC PC PC PC PC PC PC IP assigned by DHCP Server at the head end : CM => One IP Router => One IP (Default CPE number = 1)
CFGDNINT never turned on Attached TCP/IP interface to mac unit 1 Attaching network interface lo0... done. #7726 00:00:00.000 Lvl:7 OEM: OEM Descriptor v2 Found #7727 00:00:00.000 Lvl:2 Background Timer Set #7728 00:00:00.000 Lvl:7 OEM: USB set to 00:30:3b:00:23:5e #7729 00:00:00.000 Lvl:7 OEM: CMAC set to 00:30:3b:00:23:5d #7730 00:00:00.000 Lvl:7 OEM: Initialization complete #7731 00:00:00.000 Lvl:6 BPI Informational: AFSM State Changed to Start State NFS client support not included. usrnetinit Done #7732 00:00:00.290 Lvl:7 Slow Scanning Std/IRC Frequencies... #7733 00:00:00.290 Lvl:7 USB Interface is down #7734 00:00:00.290 Lvl:7 MAC Interface is up #7735 00:00:00.770 Lvl:7 USB Interface is up #7736 00:00:36.410 Lvl:7 Fast Scanning HRC Frequencies... #7736 00:00:51.270 Lvl:7 Slow Scanning HRC Frequencies... #7736 00:01:46.450 Lvl:7 Fast Scanning Std/IRC Frequencies... #7737 00:01:51.420 Lvl:7 Downstream Interface is up #7738 00:01:53.290 Lvl:7 Acquired D/S Freq: 351000000 Mod: QAM 64 #7739 00:01:53.290 Lvl:7 Found UCD ID's: 1, 2, 3 #7740 00:01:54.290 Lvl:7 Upstream Interface is up #7741 00:01:57.150 Lvl:7 Starting DHCP #7742 00:02:10.160 Lvl:7 DHCP successful: CM IP: 203.67.52.160 #7743 00:02:10.160 Lvl:7 Starting TOD at 203.67.52.141 #7744 17:34:36.000 Lvl:7 TOD Successful: MON APR 09 2001 17:34:36 #7745 17:34:36.010 Lvl:7 Starting Tftp Config File Get 'cm.bin' at 203.67.52.141 #7746 17:34:36.060 Lvl:7 Config File Get Successful. #7747 17:34:36.060 Lvl:7 Performing check for boot-state based SWUpgrade. #7748 17:34:36.060 Lvl:7 Starting Registration with temp Sid: 4747 #7749 17:34:36.070 Lvl:7 Reg Rsp OK: Successful #7750 17:34:36.070 Lvl:7 Service Class: Id 1 SID 4747 #7751 17:34:36.080 Lvl:7 Max CPE set to 4 by config file #7752 17:34:37.090 Lvl:7 Snmp Cold Start Successful! #7753 17:34:37.090 Lvl:7 Performing check for post config-file based SWUpgrade. #7754 17:34:37.090 Lvl:7 *** CM Operational ***
HFC(Hybrid Fiber Coaxial ) 450MHz HFC 750MHz HFC Cable Modem CATV Cable Modem ( Cable Modem ADSL ISDN CM Refer http://www.linkwan.com/big5/broadtech/adsl/adsl12.htm
WHAT IS ADSL A D S L Asymmetric Digital Subscriber Line
ADSL 1 ADSL Web Browser Web Server
ADSL 2 cross-talk ADSL "A" Asymmetric:
ADSL
ADSL 1 ( Central Office) ADSL ADSL MODEM ADSL 1MHz ADSL 1MHz 4KHz 0-4KHz 4KHz POTS Splitter passive filter 1MHz 100KHz 1.1MHz 6 bits
ADSL 2 (CO) ATU-C ISP ADSL ATU-C 4 KHz POTS ADSL filter POTS, PC PC CO ATU-R 4 KHz POTS CO,POTS PC DSLAM ISP
ADSL QAM CAP DMT
WHAT IS QAM 1 QAM,,bit stream (orthogonal) (I&Q).,,.
WHAT IS QAM 2
WHAT IS CAP 1 CAP ADSL,1990 AT&T Bell Labs CAP (Carrierless Amplitude Phase ). 1991 AT&T (Down-stream)1.5Mbps (Upstream) 64kbps QAM Carrierless.
WHAT IS CAP 2 CAP. CAP ADSL, ADSL CAP
CAP 1. 6kft( 1.8km) 2. 4K HZ. 3.Up stream 25K Hz to 170K HZ 4.Down stream 200K Hz to 1.1M Hz 5. CAP FDM,.Up stream channel Down stream channel,.
DMT 1 Amati Communications DMT, 256 QAM 256
DMT 2 DMT Discrete Multi-Tone 100 KHz 1.1MHz 256 Sub channel 4KHz. ADSL ADSL ADSL ADSL 256 4KHz (15) 256 4K 15 15.36Mbps
DMT 3
DMT 4 DMT
DMT 5 1. CAP, DMT. 2.,.
DMT 6 1.DMT 256, 4.3125K HZ 2.DMT 15. 3.DMT CAP QAM,,. 4. ( 26K Hz ) bit, S/N( )
DMT 7
DMT 1. DMT 256 2. DMT 256 3. DMT
ADSL MODEN ATU-C ATU-R DMT 30-45sec
WHAT IS DSLAM 1
WHAT IS DSLAM 2
WHAT IS DSLAM 3
WHAT IS DSLAM 4 DSLAM DSLAM CO,, ATM, ATM. DSLAM.
WHAT IS DSLAM 5 (LIM) (CM) Lucent DSLAM (TM) (LPM)
WHAT IS DSLAM 6 : LIM TM, ATM :, ATM. : ATU-C, ATU-C, ATM CM. : LIM.