Spectrum Advanced Voice Modem
Spectrum is a telecommunications company that provides internet, TV, and phone services to customers across the United States. Spectrum is the trade name used by Charter Communications, Inc., which was founded in 1993 and is headquartered in Stamford, Connecticut. The company is one of the largest cable operators in the United States, serving over 30 million customers in 41 states.
Spectrum offers a range of high-speed internet plans, cable TV packages with hundreds of channels, and home phone service with unlimited local and long-distance calling. They also offer various bundled packages that combine internet, TV, and phone services at discounted rates.
Understanding Device Connections
- Voice 1-2: Use to connect analog telephones to the device. Telephone service must be enabled by the service provider.
- Cable: Use to connect to the coaxial cable from your Internet service provider. Ethernet (Internet): Connects to an Ethernet-enabled device such as a wireless router using an RJ45 Ethernet cable.
- Power: Connects to the power adapter. Plug the other end into the wall power outlet.
- Battery: Use to connect to an optional external battery. The battery connection is for voice services.
- Connect the coaxial cable (not supplied) to the Cable connector on the rear panel of the eMTA and connect the other end to the cable wall outlet. Do not bend or over-tighten the cables, as this may strain the connector and cause damage. To connect an eMTA and television to the same wall outlet, you must use a cable line splitter (not included).
- Connect the Ethernet cable (supplied) to the Ethernet (Internet) port on the back panel of the eMTA and connect the other end to an Ethernet port on a wireless router (or another Ethernet-enabled device).
- Connect an RJ-11 phone cable (not supplied) to the Voice 1 or 2 port on the modem (when provisioned for voice service as specified by the service provider), and connect the other end to the phone port of the telephone. If voice service is not provisioned through the service provider, telephone service is not available.
- Connect the power adapter (supplied) to the Power port on the modem. Connect the other end to a power outlet.
Device Wall Mount Instructions
You can mount the EU2251 on a wall using the 2 mounting brackets on the side of the device. Two round or pan head screws are recommended. See the figure below for measurements.
|Label||Size in Millimeters (mm)|
|A||9.5 +/- 0.2|
|B||3.7 +/- 0.1|
|C||34.5 +/- 0.2|
To mount the device on a wall:
- Install the 2 screws horizontally on the wall 140 mm (5.51 inches) apart.
Note: The screws should protrude from the wall so you can fit the device between the head of the screws and the wall. If you install the screws in drywall, use hollow wall anchors to ensure the unit does not pull away from the wall due to prolonged strain from the cable and power connectors.
- Mount the device on the wall.
Note to CATV System Installer:
This reminder is provided to call the CATV systems installer’s attention to section 820-93 of the National Electric Code, which provides guidelines for proper grounding and in particular, specifies that the Coaxial cable shield shall be connected to the grounding system of the building, as close to the point of cable entry as practical.
Resetting the Modem
Reset: Use the reset button to either reboot (power cycle) the modem or reset the device to factory default settings. When the reset button is pressed and held for 4 to 10 seconds, the device will reboot (power cycle). If the reset button is pressed and held for 10 seconds or more, the Spectrum eMTA will reset to factory default settings. Refer to the LED Behavior table on page 5 for the reset button LED behavior. Note: When the device is in a state that suggests a power cycle (th e button icon and the surrounding ring are LED Behavior
Note: When the device is in a state that suggests a power cycle (the button icon and the surrounding ring are lit), a factory reset cannot be performed. The user must power cycle the device, then perform a factory reset.
|Power Status Light||Blue||
|Online Status Light||Blue White||
|Voice Status Light||Blue||
|Battery Status Light (NOTE: the external battery is optional)||Blue Red||
|Ethernet (Internet) Left Status Light||Green Amber||
|Ethernet (Internet) Right Status Light||Amber||
Basic Modem Info
|Example of Cable RF MAC Address||00:71:CC:8E:54:C7|
|Firmware Version Example||GA-EU2251-P20-01.03.00-BAN.000|
Interfaces & Standards
- Cable: F-Connector, Female
- Models: E31N2V1, E31T2V1, E31U2V1
- LAN: One 10/100/1000 Mbps RJ-45 port
- Models: EN2251, ET2251, EU2251, ES2251
- 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
- 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
- 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
- A-TDMA/S-CDMA (one channel): +65dBmV
- OFDMA: +65dBmV
- DOS (denial of service) attack protection
- UL/FCC Class B, Energy Star Certified
- 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), the 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
FAQs About Spectrum Advanced Voice Modem
Q: What is Spectrum Advanced Voice Modem?
A: Spectrum Advanced Voice Modem is a device that integrates a modem, router, and telephone adapter, providing internet and voice services to Spectrum customers.
Q: What are the features of Spectrum Advanced Voice Modem?
A: Spectrum Advanced Voice Modem features include dual-band Wi-Fi, advanced security, 4 Gigabit Ethernet ports, 2 telephone ports, and compatibility with Spectrum Voice services.
Q: How do I set up my Spectrum Advanced Voice Modem?
A: You can set up your Spectrum Advanced Voice Modem by following the instructions provided in the user manual or by contacting Spectrum customer support for assistance.
Q: Can I use my own router with Spectrum Advanced Voice Modem?
A: Yes, you can use your own router with Spectrum Advanced Voice Modem by connecting it to one of the Ethernet ports on the modem.
Q: Does Spectrum Advanced Voice Modem support Wi-Fi 6?
A: No, Spectrum Advanced Voice Modem does not support Wi-Fi 6. It supports dual-band Wi-Fi with support for 802.11ac.
Q: How many telephone ports does Spectrum Advanced Voice Modem have?
A: Spectrum Advanced Voice Modem has two telephone ports, which allow you to connect your home phone to the modem and use Spectrum Voice services.
Q: Is Spectrum Advanced Voice Modem compatible with all Spectrum Voice services?
A: Yes, Spectrum Advanced Voice Modem is compatible with all Spectrum Voice services.
Q: Can I connect my smart home devices to Spectrum Advanced Voice Modem?
A: Yes, you can connect your smart home devices to Spectrum Advanced Voice Modem using the Wi-Fi or Ethernet connection.
Q: Does Spectrum Advanced Voice Modem have a built-in firewall?
A: Yes, Spectrum Advanced Voice Modem has a built-in firewall that provides advanced security features to protect your home network.
Q: How do I troubleshoot issues with my Spectrum Advanced Voice Modem?
A: You can troubleshoot issues with your Spectrum Advanced Voice Modem by following the troubleshooting steps provided in the user manual or by contacting Spectrum customer support for assistance.
For more manuals by Spectrum, visit ManualsDock