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TP-LINK TD-8840T - TP-Link TD-8840T ADSL2+ Modem Router

4.1 out of 5 stars 64 customer reviews

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Product details

  • Product Dimensions: 12 x 17.4 x 2.9 cm ; 748 g
  • Boxed-product Weight: 771 g
  • Delivery Destinations: Visit the Delivery Destinations Help page to see where this item can be delivered.
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  • Item model number: TD-8840T
  • ASIN: B0041435XU
  • Date first available at Amazon.co.uk: 22 July 2010
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (64 customer reviews)
  • Amazon Bestsellers Rank:

Product Description

Product Description

What This Product Does

ADSL2/2+ Ethernet Modem Router with 4-Port Switch TD-8840T is a 2-in-1 device that combines the functions of a DSL modem and 4-port 10/100Mbps Ethernet router, brings you high-speed Internet connectivity to a home or small office. With our TD-8840T, you can easily create a wired network to share your high-speed Internet connection, documents, photos, music with up to four computers or devices.

Easy Setup and Use

The device comes with a CD with an Easy Setup Assistant that helps you step by step to configure your Internet connection. This feature allows even novice users to setup the router products without sacrificing any key features, just play the AUTO-RUN CD bundled to have your network set up quickly & hassle-free.

2-in-1 Device

The TP-LINK TD-8840T is a 2-in-1 device that combines the function of a DSL modem and 4-port 10/100Mbps Ethernet router. No need to buy a separate router, the TD-8840T is designed to allow you easily create a high-speed wired network and share it with up to four computers or other Ethernet-enabled devices to you home and to the Internet. Having this, you can avoid the cable clutter because now you have got a router inside.

Access High-Speed Internet

Supporting the latest ADSL2/2+ standards, the TD-8840T provides higher performance (up to 24Mbps downstream) and longer reach form your Internet Service Provider's (ISP) Digital Subscriber Line Access Multiplexer (DSLAM). Unlike a dial-up Internet service, the TD-8840T can get the DSL connection always on so that you don't have to wait to access the web. Besides the high-speed internet connection, this device also supports TR-069, which can automatically updates the firmware and other setting when they become available from your ISP.

Various Functions

The TD-8840T includes a built-in QoS engine that helps prioritize Internet traffic to enable smooth Internet phone calls (VoIP) and lag-free online gaming. In addition, this device includes Dual Active Firewalls (Packet filtering and NAT) to help protect your network from potential attacks from across the Internet. Setting up the TD-8840T is simple since it automatically detects your DSL settings to quickly establish a connection to the Internet.

With the function of Application Filter, you can easily set Allow or Deny for applications such as ICQ, MSN, YMSG and Real Audio/Video. If you select Allow, the router will accept the application; if you select Deny, the router will forbid the application. This is useful for home users and small office.

IP QoS-Control Bandwidth Reasonably

Among the wireless network, indiscriminate Internet surfing and bandwidth-guzzling downloads by internal users often leave home or small office with insufficient bandwidth. TD-8840T supports IP QoS function, allowing optimum utilization of bandwidth and offers bandwidth control over congestion, preventing the bandwidth abuse. In this way, the users of a small network receive committed and specific bandwidth, preventing non-critical applications from degrading network performance.


∙ Access a high-speed DSL Internet connection

∙ Up to 24Mbps downstream speed

∙ Live Parental Controls allow parents or administrators to establish restricted access policies for children or staff

∙ IP QoS features for improved bandwidth control across the network

∙ Built-in switch connects four local PCs directly, and daisy-chain out to more hubs and switches as your network grows

∙ QoS prioritization based on ToS, DSCP, 802.1p

∙ Dual Active Firewalls: NAT and Packet Filter

∙ Supports DHCP, Universal Plug-and-Play (UPnP), and includes a user-friendly Setup Wizard which takes you through configuring your network, step by step

∙ Administer and Upgrade the Router Remotely over the Internet

∙ Supports Annex M, which can double upstream data rates

Box Contains

  • TD-8840T
  • External Splitter
  • RJ-11 Telephone Cable
  • RJ-45 Ethernet Cable
  • Quick Installation Guide
  • Resource CD
  • Power Adapter

  • What do customers buy after viewing this item?

    Customer Questions & Answers

    Customer Reviews

    Top Customer Reviews

    Verified Purchase
    I bought this modem as a cheap way to connect to BT in my new house (no infinity or cable). As I'm a bit of a network geek, I wanted something that could act purely as a modem with a better router on the other side of it (A Linksys E4200 running TomatoUSB).

    I ran through the setup wizard, selecting VPI = 0, VCI = 38 and setting it to Bridged mode. I gave it the IP address and a subnet mask of

    I finally disabled the DHCP server on it and plugged it in to the WAN port of my router.

    On my router I went in to the WAN settings and changed the connection type to PPPoE and used the @btinternet.com address as my username. I set my router LAN IP address to (in a different subnet to the modem).

    My router then correctly used the modem to create a DSL link and it's working really well - I get good speeds for my area (although I have nothing to compare to for DSL) and all the features of my already owned router.

    For the price and for those who already have a good ethernet based router (perhaps from your cable provider or if you had infinity) then I strongly recommend this product as a cheap way to get DSL connectivity.
    Comment 13 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Until recently I'd not heard of TP-Link. When I finally did notice them, the styling, price point and some reviews of their kit made them seem cheap and nasty.

    Well, I am here to refute that view! The TD-8840T is in their "newer" style which, while not exactly pretty, is perfectly acceptable (and a lot better than the retro black curvy style I refer to above). It was easy to set up with the built-in wizard (no, I didn't use the CD setup tool), doesn't get at all hot in operation (it's rated at 6 Watts max.), hasn't crashed or glitched on me once, and seems to hold the ADSL sync well. Besides the normal firewall and filtering settings, it has a fairly extensive array of features (such as SNMP, QoS, VLAN, CWMP) that most people will probably never use. The web configuration interface isn't elegant, but it gets the job done and is no worse than many others. My one gripe is that the system log facilitiy is short, cryptic and generally useless.

    I bought this router to replace one of another make that was unreliable, and represents the sixth different make of router I've owned. Based on the performance of this device, I would not hesitate to buy another TP-Link product. I use it in conjunction with a much flashier (and much more expensive!) wireless device, but I like the TP-Link because this is the sort of kit you can configure once then forget about it, while it sits quietly doing its job.
    Comment 14 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    We needed to rethink our slow BT Home Hub to get a signal at the other end of the house. So in August 2012 I bought a Drayek Vigor 120 as a modem situated where the BT line came into the house, and took an RJ45/Cat 5 cable further into the house and attached an ASUS RT-N66U wireless router, with an ASUS EA-N66 as a repeater / range extender in line of sight, but serving the 'radio' shadow' caused by a large brick chimney. This combination got a strong wireless signal all over our house and improved our Broadband speed. We were very pleased with the result. However, after 6 months or so we found that we needed to re-boot the Draytek modem on an increasingly regular basis. It also got hot enough to brown the white gloss paint on the window ledge on which it sat. Last week, the ASUS RT-N66U reported that a cable wasn't attached to the modem. On further investigation we concluded that the Draytek modem was terminally failing, at just under 12 months old. Looking at reviews here on Amazon suggested buying the TP-Link TD-8817 modem router, but for £1 more I bought the TD-8840T, which has 4 LAN ports rather than just one. At £15, you can't go wrong, and its a small price to pay to sort out our household internet service -its surprising how much we rely on it. The TD-8840T was straightforward to get up and running, but I still needed to connect the ASUS wireless router. The ASUS unit didn't seem to like the fact that the TP-Link Modem was also configured as a router and was taking After further research I found out how to configure the TP-Link device simply as a modem. On the modem control panel, click on Network, then LAN Settings.Read more ›
    Comment 13 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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    Verified Purchase
    Great little combined ADSL modem and four port router for those of us who prefer the security and dependability of doing things the good old fashioned wired way.
    NO WIFI here and NO VDSL (FTTC fibre). Just good dependable wired adsl / adsl2/adsl2+ or at least as dependable as BT will allow (we're all at their mercy no matter which ISP your on - with the exception of virgin of course).
    I've had this router running a number of devices from my home (which is around 3.5km away from my local exchange) it keeps a connection of around the 4mb mark and holds the connection well (a few line issues apart which were probably down to BT it (the TP link unit) has remained pretty much rock steady.
    You could pay quite considerably more for another unit using a Broadcom or Lantiq chipset - which I myself considered as many people look down on units such as the TP Link TD-8840T which use a Trend chipset.
    All I can really say from my own experience over the last 18 months is that the unit has performed pretty much faultlessly and done it as quick as any other modem router I've used over the last 20 years. Please bear in mind that all telephone lines / conditions vary to a lesser or greater degree depending upon the distance you are from the exchange, the line condition and the circumstances at the exchange itself (DSLAM contention etc).
    For my own personal experience, minor nit-picking aside I really can't fault the unit, especially given the price paid.
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