--- product_id: 621803887 title: "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" brand: "arris" price: "€ 153.55" currency: EUR in_stock: true category: "Arris" url: https://www.desertcart.pt/products/621803887-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast store_origin: PT region: Portugal --- # DOCSIS 3.1 tech - 10x faster speeds Dual telephony ports for voice Two 1 Gbps Ethernet ports 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 **Brand:** arris **Price:** € 153.55 **Availability:** ✅ In Stock ## Summary > 🚀 Surf the future with ARRIS T25 — speed, voice, and savings in one sleek package! ## Quick Answers - **What is this?** 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 by arris - **How much does it cost?** € 153.55 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/621803887-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast) ## 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 - • **Integrated Voice Support:** Stay connected with two telephony ports supporting Xfinity Voice—crystal-clear calls without extra hardware clutter. - • **Save Big, Own Your Modem:** Cut rental fees and save up to $168/year by owning your modem—smart investing for savvy professionals. - • **Blazing Fast Connectivity:** Experience ultra-low latency and speeds up to 1 Gbps with cutting-edge DOCSIS 3.1 technology—future-proof your home network. - • **Dual Gigabit Ethernet Ports:** Seamlessly connect multiple high-speed devices without bottlenecks, perfect for work-from-home setups and streaming marathons. - • **Effortless Setup & Compatibility:** Plug, activate via the SURFboard Central app, and enjoy instant compatibility with Xfinity Internet & Voice plans up to 800 Mbps. ## Overview The ARRIS Surfboard T25 is a DOCSIS 3.1 cable modem designed for Xfinity Internet & Voice users, delivering gigabit speeds up to 1 Gbps with two Ethernet ports and dual telephony ports. It offers a cost-effective alternative to rental modems, supports plans up to 800 Mbps, and features easy app-based setup for seamless integration into your home network. ## Description Our leadership in video and broadband technology and services, combined with our dedication to close collaboration with our customers, allows us to continually stay ahead of the curve and innovate what's next. ARRIS is relentless in our focus to deliver strong results for our customers and our shareholders, and we do so in a forthright and ethical manner. ARRIS delivers a 70-year legacy of innovation. ARRIS invented digital TV & brought wireless internet into the home with the first cable modem gateway. We have a long track record of creating game-changing technology. We’re the same company that the world's leading service providers choose to connect millions of people around the world to the internet - we’re powering the digital world. ARRIS is at the center of a new era of entertainment and communication that unites our vision and technological leadership with our customers’ evolving needs to help transform the way that millions of people around the world connect to the internet and consume content. The ARRIS SURFboard T25 DOCSIS 3.1 Cable Modem is designed to bring you superior connectivity, increase your network capability and provide faster streaming and downloading throughout your home. From a strusted brand with over 260 million modems sold and growing. ## 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.Voltage: 100240 Volts - 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 | |---------------|-------| | ASIN | B07MGPPNZD | | Box Contents | Power Supply | | Brand Name | ARRIS | | Colour | Black | | Compatible Devices | IOT devices, Personal Computer, Tablet, cell phone, firestick, iPhone, streaming devices | | Customer Reviews | 4.1 4.1 out of 5 stars (1,675) | | Data Transfer Rate | 1000 Megabits Per Second | | Global Trade Identification Number | 00612572215845 | | Internet Service Provider | Xfinity | | Item Dimensions L x W x H | 6.8L x 18.2W x 26.8H centimetres | | Item Type Name | Xfinity Voice Cable Modem | | Manufacturer | CommScope | | Manufacturer Part Number | T25 | | Maximum Downstream Data Transfer Rate | 1000 Megabits Per Second | | Maximum Upstream Data Transfer Rate | 1000 Megabits Per Second | | Model Number | T25 | | Modem Type | Cable | | Network Connectivity Technology | Coaxial Cable, Ethernet | | Number of Ethernet Ports | 4 | | Number of Items | 1 | | Number of Ports | 4 | | UPC | 612572215845 | ## Product Details - **Brand:** ARRIS - **Compatible devices:** IOT devices, Personal Computer, Tablet, cell phone, firestick, iPhone, streaming devices - **Connectivity technology:** Coaxial Cable, Ethernet - **Internet service provider:** Xfinity - **Product dimensions:** 6.8L x 18.2W x 26.8H centimetres ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/71znKIOnPhL.jpg) ## Available Options This product comes in different **Size** options. ## 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 35ms : x 36ms : xxxxxxxxxx 37ms : xxxxxxxxxxxxx 38ms : xxxxxxx 39ms : xxxxxx 40ms : xxxx 41ms : xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 42ms : xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 43ms : xxxxxxxxxxxxxxxxxxxxxxxxx 44ms : xxxxxxxxxxxxxxxxxxxxxxxx 45ms : xxxxx 46ms : x 47ms : xxxx 48ms : xxxxx 49ms : xx 50ms : x 52ms : x **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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/621803887-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast](https://www.desertcart.pt/products/621803887-arris-surfboard-t25-docsis-3-1-gigabit-cable-modem-comcast) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-06*