Cable Modem,Docsis2.0, Eurodocsis2.0

Technical Specification

Item

Downstream

Upstream

Frequency Range 

Euro-DOCSIS: 88~860MHz

DOCSIS: 112~858Mhz

Euro-DOCSIS: 5~65Mhz

DOCSIS: 5~42Mhz

Modulation

4/16/32/64/128/256/512/1024 QAM

QPSK, 8/16/32/64/128 QAM

Data Rate*

DOCSIS:

64QAM: 30Mbps

256QAM: 42.8Mbps 

Euro-DOCSIS:

64QAM: 41Mbps

256QAM: 55Mbps

QPSK 0.32 ~ 10.24Mbps

8QAM 0.48 ~ 15.36Mbps

16QAM 0.64 ~ 20.48Mbps

32QAM 0.80 ~ 25.60Mbps

64QAM 0.96 ~ 30.72Mbps

128QAM/TCM 30.72Mbps

Bandwidth

Euro-DOCSIS: 8MHz

DOCSIS: 6MHz

TDMA: 200, 400, 800, 1600, 3200 and 6400 kHz

S-CDMA: 1600, 3200 and 6400 kHz

FEC

RS (128,122) GF128 with

Trellis coding

Reed Solomon

Signal Level

Receive Power Level :

DOCSIS:

-15 ~ +15dBmV

Euro-DOCSIS:

64 QAM: –17 dBmV ~ +13dBmV

256 QAM: –13dBmV ~ +17 dBmV

Transmit Power Level :

TDMA:

+8 ~ +54dBmV(32QAM, 64QAM)

+8 ~ +55dBmV(8QAM, 16QAM)

+8 ~ +58dBmV(QPSK)

S-CDMA: +8 ~ +53dBmV(all modulation)

Signal-to-NoiseRatio (SNR)

BER < 10^-8

Euro-DOCSIS:

64QAM:  >= 25.5dB

256QM: -13 dBmV ~ -6dBmv >= 34.5dB

       -6dBmV~ +17dBmV  >= 31.5dB

DOCSIS:

64QAM: >23.5dB

256QAM: >30dB

Security

DOCSIS Baseline Privacy Plus: 1024-bit RSA and 128-bit Tripple-DES for BPKM protocol

56 -bit DES for data encryption

X.509 v3 certificates

DOCSIS

Compliant to DOCSIS 2.0 and Euro-DOCSIS 2.0

Protocol

TCP/IP, UDP, ARP, ICMP, DHCP, SNMP, TFTP, TOD, BOOTP, SYSLOG

Configuration

Ease of configuration and privacy control provided by resident or downloaded code from a Cable Modem Termination System (CMTS)

Bridging

Support for unicast, broadcast, and multicast IP packets

Variable-length packet cable Media Access Control (MAC) transport layer

Mix of contention and reservation-based upstream transmission

Quality of Service

Quality of service of MAC layer