Cisco Systems Cisco uBR10012 manual Throughput Bit Rate Overhead, MHz Bit/symbol MSym/sec Mb/sec

Chapter 1 Cisco uBR10012 Universal Broadband Router Overview

Cisco uBR10012 Router and Cisco IOS Software

Table 1-2	DOCSIS and EuroDOCSIS 2.0 Upstream Data Rates
		Modulation Scheme,	Baud Rate,	Raw Bit Rate,	Throughput (Bit Rate - Overhead),
Upstream Channel Width		bit/symbol	symbol/sec	Mb/sec	Mb/sec
6.4 MHz		64-QAM	5.12M	30.96	27.2
		32-QAM		25.80	22.3
		16-QAM		20.54	19.8
		8-QAM		15.48	13.3
		QPSK		10.30	8.9
3.2 MHz		64-QAM	2.56 M	15.48	13.3
		32-QAM		12.90	11
		16-QAM		10.30	8.9
		8-QAM		7.68	6.6
		QPSK		5.12	4.4
1.6 MHz		64-QAM	1.28 M	7.68	6.6
		32-QAM		6.45	5.5
		16-QAM		5.12	4.4
		8-QAM		3.84	3.3
		QPSK		2.56	2.2
800 kHz		64-QAM	640 K	3.84	3.3
		32-QAM		3.20	2.75
		16-QAM		2.56	2.2
		8-QAM		1.92	1.65
		QPSK		1.28	1.1
400 kHz		64-QAM	320 K	1.92	1.65
		32-QAM		1.60	1.38
		16-QAM		1.28	1.1
		8-QAM		0.96	0.83
		QPSK		0.64	0.54
200 kHz		64-QAM	160 K	0.96	0.83
		32-QAM		0.80	0.63
		16-QAM		0.64	0.54
		8-QAM		0.48	0.40
		QPSK		0.32	0.27
Table 1-3	DOCSIS and EuroDOCSIS Downstream Data Rates
Downstream Channel Width,		Modulation Scheme,	Baud Rate,	Raw Bit Rate,	Throughput (Bit Rate - Overhead),
MHz		bit/symbol	MSym/sec	Mb/sec	Mb/sec
6		64 QAM (6)	5.056	30.34	27
		256 QAM (8)	5.360	42.88	39
8		64 QAM (6)	6.592	39.55	36
		256 QAM (8)	6.592	52.74	51

Cisco uBR10012 Universal Broadband Router Hardware Installation Guide

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