Spectrum D3.1 eMTA User manual
Spectrum D3.1 eMTA
DOCSIS 3.1 Advanced Voice Modem
User Guide
2Spectrum Modem
Understanding Device Connections
Rear Panel:
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.
DOCSIS 3.1 eMTAback of battery backup
DC power
connector
DC power connector
battery connector
battery
connector
3Spectrum Modem
Installing Modem
1. 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 a
television to the same wall outlet, you must use a cable line splitter (not included).
2. 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 other
Ethernet-enabled device).
3. Connect an RJ-11 phone cable (not supplied) to the Voice 1 or 2 port on the modem (when
end to the phone port of the telephone. If voice service is not provisioned through the
service provider, telephone service is not available.
4. Connect the power adapter (supplied) to the Power port on the modem. Connect the other
end to a power outlet.
Installation Diagram
XXXXXXXXXXXXXXX
electrical outlet
power supply
(modem)
power supply
(router)
electrical outlet
cable outlet
coax cable
DOCSIS 3.1 eMTA WiFi router
phone
cable
Ethernet cable
phone
splitter
4Spectrum Modem
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
To mount the device on a wall:
1. Install the 2 screws horizontally on the wall 140 mm (5.51 inches) apart.
Note:
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.
2. 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, specify that the Coaxial cable shield shall
be connected to grounding system of the building, as close to the point of cable entry as practical.
Label Size in Millimeters (mm)
A9.5 +/- 0.2
B3.7 +/- 0.1
C34.5 +/- 0.2
140 mm (5.51 inches)
A B C
5Spectrum Modem
Reseting the Modem
Front Panel:
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.
Reset LED Behavior
Red Ring
Device is waiting to be Power Cycled:
Easing between On Red and O
Reset -Press and hold for 5 seconds to reset modem.
Factory reset -Press and hold for more than 10 seconds
to reset modem to factory default settings.
Note: You will see the ring and text illuminate when you
press the button.
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.
6Spectrum Modem
LED Behavior
LEDs Color Description
Power
Status Light
Blue • Powering Up: Flashing between On Blue and O
• Normal Operation: On Blue
Online
Status Light
Blue
White
• Determining Connection: Easing between On Blue and On White
• Device has entered DOCSIS 3.0 Bonded State: On White
• Device has entered DOCSIS 3.1 Bonded State: On Blue
• Network Access Denied: O
Voice
Status Light
Blue • Voice Service Not Provisioned: O
• Voice Service Active: On Blue
• Phone Cable Connected to Voice Port: On Blue
• Phone Cable Not Connected to Voice Port: On Blue
O
Flashing between On Blue and O
• Unable to Establish Phone Connection: O
Battery
Status Light (NOTE:
external battery is
optional)
BLUE
RED
On Blue
• Battery at 20% (of usable charge) or Lower: On Red
• No Battery Installed: O
• Battery Charging: Easing between On Blue and O
Ethernet (Internet)
Left Status Light
Green
Amber
• On Green - An Ethernet Device is Connected at 100 Mbps
• On Amber - An Ethernet Device is Connected at 2500 Mbps (2.5G)
• O - An Ethernet Device is Connected at 100 Mbps
Ethernet (Internet)
Right Status Light
Amber • On Amber - Data is Being Passed Between the EU2251 and the Connected Device
• O - No link is established
7Spectrum Modem
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) ccompatible
Downstream*
• Modulation: 64 or 256 QAM and OFDM: up to 4096 QAM
• 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
Basic Modem Info
Example of Cable
RF MAC Address
Firmware Version
Example
GA-EU2251-P20-01.03.00-BAN.000
Compatibility
• Ethernet 100/1000/2500 Mbps
• PacketCable 1.5 and 2.0
8Spectrum Modem
Upstream*
• Modulation: QPSK or 8/16/32/64/128 QAM and OFDMA: up to 4096 QAM
• 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
Voice
• PacketCable 1.5 (NCS) or 2.0 (IMS/SIP) compatible
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
• Weight: 632.6g (1.4 lbs), unit only
• Optional External Battery
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