Chapter 1
Getting started
The SURFboard T25 is a combination DOCSIS 3.1 telephony cable modem with two Voice-
over-IP (VoIP) telephone lines. It uses DOCSIS 3.1 technology to provide ultra high-speed
Internet access on your home or small business network.
This is a not a Wi-Fi cable modem. You will need use the T25 Ethernet port to add a Wi-Fi
router (a seperate purchase) for a whole home connectivity.
Using the connection capabilities of the T25, you can connect your computer and other
network-enabled devices through the two Ethernet ports.
Important:
To use the 2nd Ethernet port, contact your service provider to get an
additional IP address.
The T25 connects to the existing coaxial cable connection in your home.
Note:
For Internet connections, you need a cable service connection with a cable
Internet Service Provider. The T25 will not work with DSL or satellite Internet service.
This guide provides instructions for installing your T25.
About your T25
The T25 telephony modem is DOCSIS 3.1 compliant with the following features:
■
Speed: much faster than dialup or ISDN service; DOCSIS 3.1 is 10 times faster than
DOCSIS 3.0.
■
Connectivity: supports Ethernet connection.
■
Flexibility: provides two lines of telephone service as well as high-speed data.
■
Compatibility: Data services: DOCSIS 3.0 compliant ; supports tiered data services (if
offered by your service provider).
■
Telephony services: Packet Cable
™
2.0 compliant.
In your box
Before installing the T25, check that the following items are also included in the box. If any
items are missing, please call ARRIS Technical Support at 1-877-466-8646 for assistance.
SURFboard
®
T25 Cable Modem with Xfinity Voice User Guide STANDARD Revision x.5
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