Download for TD-8840T V4

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>How to find the hardware version on a TP-Link device?

IMPORTANT: Model and hardware version availability varies by region. Please refer to your TP-Link regional website to determine product availability.
Product Overview


TD-8840T_V4_Easy Setup Assistant

Published Date: 2012-08-09 Language: English File Size: 9.32 MB
Operating System: Win2000/XP/2003/Vista/7



A firmware update can resolve issues that the previous firmware version may have and improve its current performance.

To Upgrade

IMPORTANT: To prevent upgrade failures, please read the following before proceeding with the upgrade process

  • Please upgrade firmware from the local TP-Link official website of the purchase location for your TP-Link device, otherwise it will be against the warranty. Please click here to change site if necessary.
  • Please verify the hardware version of your device for the firmware version. Wrong firmware upgrade may damage your device and void the warranty. (Normally Vx.0=Vx.6/Vx.8 (eg:V1.0=V1.6/V1.8);   Vx.x0=Vx.x6/Vx.x8 (eg:V1.20=V1.26/V1.28)
    How to find the hardware version on a TP-Link device?
  • Do NOT turn off the power during the upgrade process, as it may cause permanent damage to the product.
  • To avoid wireless disconnect issue during firmware upgrade process, it's recommended to upload firmware with wired connection unless there is no LAN/Ethernet port on your TP-Link device.
  • It's recommended that users stop all Internet applications on the computer, or simply disconnect Internet line from the device before the upgrade.
  • Use decompression software such as WinZIP or WinRAR to extract the file you download before the upgrade.


Published Date: 2015-09-17 Language: English File Size: 1.08 MB

Modifications and Bug Fixes:

  1. Add option of 'enable NAT' in the page when connection type is PPPOE


 For TD-8840T(UN)V4.0


Published Date: 2014-10-22 Language: English File Size: 1.35 MB

Modifications and Bug Fixes:

  1. Fix the bug that DDNS domain name becomes invalid after rebooting.
  2. Change offical Dyndns URL to in DDNS section.
  3. Fix the bug that LAN PCs can't access to internet when it utilize IPoA as Connection Type .
  4. Add a function to view the network interface traffic statistics in SNMP.


For TD-8840T_V4


Published Date: 2014-04-18 Language: English File Size: 1.35 MB

Modifications and Bug Fixes:

  1. Improved security mechnism.
  2. Banned logining the management interface after trying wrong username or password over 5 times.
  3. Banned downloading files via URL.
  4. Add logout function.
  5. Banned accessing firmware page from WAN.
  6. Fixed other bugs and issues.


FOR TD-8840T V4

To Use Third Party Firmware In TP-Link Products

Some official firmware of TP-Link products can be replaced by the third party firmware such as DD-WRT. TP-Link is not obligated to provide any maintenance or support for it, and does not guarantee the performance and stability of third party firmware. Damage to the product as a result of using third party firmware will void the product's warranty.

Open Source Code For Programmers (GPL)

Please note: The products of TP-Link partly contain software code developed by third parties, including software code subject to the GNU General Public Licence (“GPL“), Version 1/Version 2/Version 3 or GNU Lesser General Public License ("LGPL"). You may use the respective software condition to following the GPL licence terms.

You can review, print and download the respective GPL licence terms here. You receive the GPL source codes of the respective software used in TP-Link products for direct download and further information, including a list of TP-Link software that contain GPL software code under GPL Code Center.

The respective programs are distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the respective GNU General Public License for more details.

T2700G-28TQ License Download
License Model: T2700G-28TQ-L1000

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