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Item#: 9SIA0AJ2TV7549

TP-LINK TD-8840T ADSL2+ Modem Router Up to 24Mbps Downstream Ethernet Port ADSL/ADSL2/ADSL2+ Standards

  • Up to 24Mbps downstream
  • 4 x 10/100Mbps RJ45 Port
  • 1 x RJ11 Port
  • IEEE Standards: IEEE 802.3, 802.3u
  • ADSL Standards:
  • Full-rate ANSI T1.413 Issue 2, ITU-T G.992.1(G.DMT), ITU-T G.992.2(G.Lite)
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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the TP-LINK TD-8840T




Modem Router Combo
4 x 10/100Mbps RJ45 Port
Cable Interface
1 x RJ11 Port
IEEE Standards: IEEE 802.3, 802.3u

ADSL Standards:
Full-rate ANSI T1.413 Issue 2, ITU-T G.992.1(G.DMT), ITU-T G.992.2(G.Lite)
ITU-T G.994.1 (G.hs), ITU-T G.995.1 , ITU-T G.996.1, ITU-T G.997.1, ITU-T K.2.1

ADSL2 Standards: ITU-T G.992.3 (G.dmt.bis), ITU-T G.992.4 (G.lite.bis)

ADSL2+ Standards: ITU-T G.992.5
Max Transmission Rate
Up to 24Mbps downstream


Button: 1 Power On/Off Switch

External Power Supply: 9VDC/0.6A

Quality of Service: QoS Remarking based on IPP/ToS, DSCP and 802.1p

Port Forwarding: Virtual server, DMZ, ACL(Access Control List)

VPN Pass-Through: PPTP, L2TP, IPSec Pass-through

ATM/PPP Protocols:
ATM Forum UNI3.1/4.0,
PPP over ATM (RFC 2364),
PPP over Ethernet (RFC2516),
IPoA (RFC1577/2225),
PVC - Up to 8 PVCs

Advanced Features:
Traffic Shaping(ATM QoS) UBR, CBR, VBR-rt, VBR-nrt;
Dynamic Host Configuration Protocol (DHCP), DHCP relay;
Network Address Translation (NAT);
Static Routing, RIP v1/v2 (optional);
IGMP Multicast, UPnP

Security: NAT Firewall, MAC /IP /Application/URL Filtering

Web Based Configuration(HTTP), Remote management, Telnet management, SNMP v1/2c, SNMP over EOC, Web Based Firmware Upgrade, Diagnostic Tools

System Requirements: Microsoft Windows 98SE, NT, 2000, XP, Vista or Windows 7, MAC OS, NetWare, UNIX or Linux.

Access a high-speed DSL Internet connection

Up to 24Mbps downstream speed

Supports Annex M, which can double upstream data rates

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.
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 2 years
  • Limited Warranty period (labor): 2 years
  • Read full details

Customer Reviews of the TP-LINK TD-8840T

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  • Dena G.
  • 5/31/2014 1:00:34 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month

5 out of 5 eggsAn excellent ADSL2 Modem/CPE/Router

Pros: I'm not absolutely sure why this modem CPE has such horrid comments. It ain't a Cisco although it's the best modem I've ever owned. TP-Link is excellent for the price and can't be beat. This thing is very responsive and works nicely w/ my Centurylink ADSL2 in bridge mode and in router mode. Very stable, very low latency, exactly as described.

Cons: It is plastic

Other Thoughts: It needs to be metal

Did you find this review helpful? Yes No

  • Nathan C.
  • 6/5/2013 11:41:25 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggscould never get it working my dsl

Pros: price was nice

Cons: i could never get it to work with centurylink they have a ppoe password login network. no matter how many times i type it in i couldn't get it going,even got on the phones with their techs.

Manufacturer Response:

Dear customer,
We apologize for the inconvenience caused.
may I provide you some suggestions?
1. Check if your line is ADSL or VDLS; The TD-8840T is an ADSL modem router. If your service is VDSL, the TD-8840T cannot work on it;
2. Check with Centurylink the following parameters and then reconfigure the modem router again:
WAN Connection Type

If you need further info, please don't hesitate to drop me an email@
Best Regards!

TP-LINK Support Team
(866) 225-8139

Did you find this review helpful? Yes No

  • Scott N.
  • 4/12/2012 6:57:28 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week

3 out of 5 eggsVulnerable

Pros: (trying to be nice) Configuration offers plenty of options
Nice features: 4 ports and QoS

Cons: US-CERT Vulnerability 834723: "The TP-Link 8840T DSL router's remote management feature is enabled by default." -- that is, a remote attacker can log on with the default password. I actually think the router is a bit adaptive, but this is still really weak. ie: SPI is disabled by default in their latest firmware.

I'm getting lots of unexplained errors in the log. Thousands.

Other Thoughts: The connection is stable, but two things together are enough for me to look for another product.

I don't know what to make of tp-link. (is "TP" for Twisted Pair, or Toilet Paper?) They have products with a lot of features and (apparent) value for money, but they suffer from significant flaws. If they work hard to improve quality, then they have a lot of potential.

0 out of 1 people found this review helpful. Did you? Yes No

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