Item description for Spectrum ET2251 DOCSIS 3.1 eMTA 2.5G Internet Cable Modem

Modem is in brand new condition. To the best of our knowledge, this is only compatible with Spectrum internet services, and unlikely to work with other internet service providers.

Spectrum ET2251 DOCSIS 3.1 eMTA 2.5G Internet Cable Modem

Description:

Interfaces & Standards

• Cable: F-Connector, female

• Models: E31N2V1, E31T2V1, E31U2V1

• LAN: One 10/100/1000 Mbps RJ-45 port

• Models: EN2251, ET2251, EU2251

• LAN: One 10/100/2.5 Gbps RJ-45 port

• Telephony: 2 RJ-11 ports

• PacketCable 1.5 (NCS) or 2.0 (IMS/SIP) compatible

• DOCSIS 3.1 certified

Downstream*

• Frequency Range: 258MHz-1218MHz

• Capture Bandwidth: 1.218GHz

• Modulation: 64 or 256 QAM and OFDM: up to 4096 QAM

• Maximum DOCSIS 3.1 Data Rate: 2 x 192MHz OFDM

channels provide capacity up to 5Gbps

• Maximum DOCSIS 3.0 Data Rate: 32 downstream channels

provide speeds up to 1372Mbps

• Symbol Rate: 5361 Ksps

• RF (cable) Input Power:

• -15 to +15dBmV (64/256 QAM)

• -6 to +15dBmV (4096 QAM)

• Input Impedance: 75 Ω

Upstream*

• Frequency Range: 5MHz ~ 42MHz/85MHz switchable

• Modulation: QPSK or 8/16/32/64/128 QAM and OFDMA: up

to 4096 QAM

• Maximum DOCSIS 3.1 Data Rate: 2 x 96MHz OFDMA

channels provide capacity up to 2Gbps

• Maximum DOCSIS 3.0 Data Rate: 8 upstream channels

provide speeds up to 246Mbps

• Symbol Rate: 160, 320, 640, 1280, 2560, 5120 Ksps

• RF (cable) Output Power:

• A-TDMA/S-CDMA (one channel): +65dBmV

• OFDMA: +65dBmV

Security

• DOS (denial of service) attack protection

Regulatory

• UL/FCC Class B, Energy Star Certified

Voice

• PacketCable 1.5 (NCS) or 2.0 (IMS/SIP) compatible

• Line Voltage On-hook: -48 Volts, Loop Current:

20mA/41mA, Ring Capability: 2K ft., 5REN, Hook State:

Signaling Loop Start

• DTMF Tone Detection, T.38 Fax Relay (G.711), Echo

Cancellation (G.168) / Silence Suppression, Voice Active

Detection and Comfort Noise Generation

• G.722 codec, WB SLIC

Physical and Environmental

• Dimensions: 70.8mm, 2.8 inches (W), 215mm, 8.46

inches (H), 170mm, 6.7 inches (D)

• Weight: 632.6g (1.4 lbs), unit only

• Power: 12V 1.5A (output), 100-240VAC, 50-60Hz, 1A

Max (input), external PSU

• Operating Temperature: 0°C ~ 40°C (32°F ~ 104°F)

• Humidity: 5 ~ 95% (non-condensing)

• Optional External Battery

* Actual speeds may vary based on factors including network configuration, and connected devices.