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TECHNICAL SPECIFICATIONS    

SMC8511 

COMPATIBILITY

• DOCSIS 2.0 certified
• Platform Independent-works with PC or Mac

PORTS

• Cable Interface F type female 75 ohm
• Ethernet RJ45 connector

CABLE MODEM FEATURES

• DOCSIS 2.0 certified

• Downstream:

• Modulation: 64/256QAM auto detection
• Frequency Range: 91-860 MHz
• Maximum Data Rate: 

• 41Mbps (64QAM)
• 55Mbps (256QAM)

• Bandwidth: 6MHz
• Receive Power Levels:

• -15dBmV to +15dBmV, 64QAM
• -13dBmV to +17dBmV, 256 QAM

• Signal-to-Noise Ratio (SNR):

• 64QAM: >=25.5 dB
• 256QAM: >=34.5dB (13dBmV to -6dBmV)

>=31.5dB(-6dBmV to +17dBmV)

• Upstream:

• Frequency Range: 5-42 MHz
• Modulation: 8/16/32/64/128 QAM and QPSK
• Maximum Data Rate:

• 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: 

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

• S-CDMA: 1600, 3200 and 6400 kHz
• Transmit Power Levels:

• TDMA:

• +8 ~ +54dBmV(32QAM, 64QAM)
• +8 ~ +55dBmV(8QAM, 16QAM)
• +8 ~ +58dBmV(QPSK)
• S-CDMA: +8 ~ +53dBmV(all modulation

• Quality of Service (QoS) features

PROVISIONING & MONITORING

• Full featured remote management
• Remote diagnostics and statistics
• Remote software download

SECURITY

• Password protected configuration access
• Web based authentication

CERTIFICATION

• FCC Part 15 Class A
• FCC  Part  15.247

MECHANICAL

• Size: 14.5" W x 7.75" H x 4.25" D - without brackets
• Weight: 20 Lbs
• Mounting (Strand): Clamps to CATV strand
• Mounting (Pipe): Pipe Mount 1.25-2.25 inch OD

POWER

• CATV 60-90 VAC thru CATV connector or 18-28 VDC via 

Ethernet connector

• Consumption: 25 Watts
• 24VDC (PoE) available to power external ethernet device

ENVIRONMENTAL

• Operating Temp:   -40 degree to +65 degree C
• Operating Humidity: 5%-95% non-condensing

WARRANTY

• Limited Lifetime

North America

20 Mason
Irvine, CA 92618
1-800-SMC-4YOU
24/7 Technical Support

Europe/ Africa

Fructuos Gelabert 6-8
08970 Sant Joan Despí
Barcelona, Spain

Check www.smc.com for your local 
country contact information

www.smc.com

Contact

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