---
product_id: 359905236
title: "SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black"
brand: "arris"
price: "$1140.71"
currency: USD
in_stock: true
url: https://www.desertcart.ec/products/359905236-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast-xfinity
store_origin: EC
region: Ecuador
---

# DOCSIS 3.1 tech - 10x faster speeds Dual 1 Gbps Ethernet ports 2 telephony ports for digital voice SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black

**Brand:** arris
**Price:** $1140.71
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock Gigabit Power & Voice Clarity — Own Your Speed, Own Your Savings!

## Quick Answers

- **What is this?** SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black by arris
- **How much does it cost?** $1140.71 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/359905236-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast-xfinity)

## Best For

- arris enthusiasts

## Why This Product

- Trusted arris brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Gigabit Ethernet:** Seamlessly connect multiple devices with two 1 Gbps ports for ultra-reliable wired networking.
- • **Blazing Fast DOCSIS 3.1:** Experience next-gen internet speeds up to 800 Mbps with cutting-edge cable tech.
- • **Integrated Voice Support:** Stay connected with two telephony ports supporting crystal-clear digital voice calls.
- • **Save Big, Own Your Modem:** Cut up to $168/year in rental fees by owning your modem outright—smart savings for savvy pros.
- • **Effortless Setup & Security:** Plug, activate via SURFboard Central app, and enjoy preset Wi-Fi security for worry-free connectivity.

## Overview

The ARRIS SURFboard T25 is a DOCSIS 3.1 cable modem designed for Comcast Xfinity Internet & Voice plans, delivering up to 800 Mbps speeds. Featuring two 1 Gbps Ethernet ports and dual telephony ports, it supports high-speed wired connections and digital voice services. With easy app-based setup and the ability to save on rental fees, it’s the perfect modem for professionals seeking reliable, fast, and cost-effective home networking.

## Description

ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black

## Features

- Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees. For use with Xfinity Internet & Voice Service. Preset Wi-Fi Security: No
- Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider).
- Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.
- Compatibility: The SURFboard T25 is compatible with Xfinity Internet & Voice service and is approved for cable internet speed plans up to 800 Mbps.
- Xfinity cable modem 3.1 compatible internet computer networking modems approved docsis docis3.1 1 gig best for high speed with fiber optic gaming gigabit wifi 6 voice 2 telephony ports 800 mbps speed t 25 internet and voice plans

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | ARRIS |
| Product Dimensions | 5.4 x 15.88 x 19.05 cm; 762.04 g |
| Item model number | T25 |
| Manufacturer | CommScope |
| Series | T25 Xfinity Docsis 3.1 Voice Cable Modem |
| Color | Black |
| Number of Ethernet Ports | 4 |
| Voltage | 100240 Volts |
| Are Batteries Included | No |
| Item Weight | 762 g |

## Product Details

- **Brand:** ARRIS
- **Internet service provider:** Xfinity
- **Connectivity technology:** Coaxial Cable, Ethernet
- **Compatible devices:** Personal Computer, Smartphone
- **Product dimensions:** 6.8L x 18.2W x 26.8H centimeters

## Images

![SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem, Comcast Xfinity Internet & Voice, Two 1 Gbps Ports, 2 Telephony Ports, 800 Mbps Max with Xfinity Internet Plans,Black - Image 1](https://m.media-amazon.com/images/I/71znKIOnPhL.jpg)

## Questions & Answers

**Q: does it work with Mediacom cable and voice service?**
A: No, T25 is compatible to work only with Comcast Xfinity's cable internet subscription

**Q: Does this model still use the Intel Puma chipset?**
A: It has the PUMA 7 chipset -> the 5,6 & 7 chipset are all vulnerable to the TCP issue -> but PUMA 6 is the most impacted by this issue. But you have to be targeted for it to be an issue and is only really a problem if you do "fast twitch" gaming activities while targeted.  A series of very many small TCP packets can be sent in a way that overwhelms the cable modem's buffers causing latency and jitter to spike to 100-150 ms while being targeted.  There is a test on DSL reports that will test this TCP vulnerability for the PUMA chipset. Intel (chipset owner -> they bought PUMA from Texas Instruments several years ago) they did come out with a patch for this issue after about a year of it being in the wild ->  my understanding is that the patch has been out since mid 2018 and should be pushed down to your modem by your ISP.

I bought this modem (T25) and after having it provisioned by COMCAST/XFINITY  -> I ran the TCP PUMA test and my modem passed without issue & performed just as well as the rental modem. 

You can buy this modem without issue or fear of this PUMA chipset issue...

Latency Test Results from PUMA TCP Test

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**Q: my arris tm822r has battery backup, which is great for when power goes out. does this modem have a battery backup?**
A: No, T25 does not has the battery backup but you can use an external UPS power supply in case of power outages

**Q: does it work with cox cable and voice service?**
A: Cox has support for ARRIS / Surfboard TM3402 
here is a list. 
https://www.cox.com/residential/support/cox-certified-cable-modems.html
best bet is to call them and ask.
besides switching to gigablast and getting VoiP is a much better deal. you can actually save some $$ and get crazy speeds..

## Frequently Bought Together

- ARRIS (T25) - Cable Modem - Fast DOCSIS 3.1 Gigabit Cable Modem , Comcast Xfinity Internet & Voice , Two 1 Gbps Ports, 800 Mbps Max with Xfinity Plan
- TP-Link AX1800 WiFi 6 Router V4 (Archer AX21) – Dual Band Wireless Internet Router, Gigabit Router, Easy Mesh, Works with Alexa - A Certified for Humans Device

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-22*