D-Link DSL-2540B ADSL2/2+ Modem with 4-Port Ethernet Router 24Mbps Downstream, 3.5Mbps Upstream Ethernet Port ADSL Standards: Multi-mode Full-rate ANSI T1.413 Issue 2 ITU-T G.992.1 (G.dmt) Annex A/C/I ITU-T G.992.2 (G.lite) Annex A/C

Pros: I bought this modem to replace the standard one that comes from Verizon. I wanted the four Ethernet ports and more control over my modem. That is exactly what I got and the modem works quite well. I also got a slight speed bump for my downloads, about 5-10%. I use SpeedTest frequently, and my previous modem was just a touch slower.

Cons: The reason why I knocked a star off is because of the poor documentation. This lack of documentation is an indirect reason why this modem gets some bad reviews. A lot of people do not have the expertise to do do the necessary troubleshooting. From what I have seen, it appears that most people do not understand what a DHCP lease is. You have to either wait for your old modems IP address lease to expire, or tell your old modem to release it before you start to set the new modem up.

D-Link would be smart to put the most frequently used configurations online. This would eliminate a lot of confusion. As it is, the information you get from online forums is sketchy, and fraught with misunderstanding of the technology.

Better yet, D-Link would be smart to put specific ISP configurations in the firmware. A menu selection of which country you are from and which ISP you are using would be useful. As it was, the United States was not one of the country choices in the setup. We fall under "Other" for some reason.

Other Thoughts: Don't upgrade the firmware. Some people have had issues. From what I have researched, the update is not necessary. The firmware updates are older than the shipping modem, so the modem has the latest. The most recent update is from 7/24/2012.

I use Verizon, so here are the settings I used (manual configuration, not auto):

VPI / VCI: 0 / 35
Connection Type: MER (MAC Encapsulated Routing)
Encapsulation Mode: LLC/SNAP - BRIDGING
Service Name: mer_0_0_35_2
Service Category: UBR (Without PCR)
QoS: Disabled
IP Address: Automatically Assigned (IP, gateway, and DNS)
Service State: Enabled
NAT: Enabled
Firewall: Enabled
IGMP Multicast: Enabled
Quality Of Service: Disabled

Auto configuration should work just fine. If you do not want to get into the internals, just connect the modem to your phone line and let it sit over night. The old modems IP address should expire by morning and your new modem should have its own. You can tell when the Internet LED is either solid green or blinking green. If it is not lit green, then connect to the router and try auto config, then manual if that fails.

I hope that this helps some of those that are considering this modem, especially those who use Verizon. This is a pretty good modem, and really easy to setup once you understand what is going on.

Pros: Configuration was automatic with the setup Wizard and my Wifi router connected plug-and-play -- nothing could be easier.

Upload and download speeds have increased notably compared to my ISP-provided modem.

Cons: DO NOT FLASH WITH D-LINK FIRMWARE!

I purchased this modem from Newegg because a previous one I had had purchased from another site was bricked when I flashed it.

Other Thoughts: The modem has port forwarding for many common games but still requires setting DMZ on for some older on-line games.

Pros: Easy setup (1+ egg) -- the modem was up and running in less than two minutes and this was with the manual setup. Seemed to stay connected (1+ egg) well (my old Comtrend modem got where it was dropping connection frequently). Attaching a WiFi router to this one was literally plug and play (1+ egg).

Cons: DO NOT FLASH WITH THE FIRMWARE PROVIDED ON THE D-LINK SITE!

Flashing the modem with the firmware on the D-Link site will render it inoperable. Even though the D-Link site states that the firmware is for revisions A or B and the modem say's it's a 2540B, don't be fooled -- it is not one of these HW revisions. Flashing the firmware on the D-Link site will destroy the modem. I wish I'd looked closer at the reviews here before doing this.

(-1 egg for D-Link's firmware flash wizard not detecting and preventing a flash with an incompatible firmware version and -1 egg for D-link providing a firmware that will destroy their new modems and not making it darn well clear that it will do this).

Other Thoughts: Not sure if it's a Con or something not set up right but I had a hard time staying connected to a game server, even though the proper ports were forwarded in the setup. No eggs off for this though as all other sites connected fine before the firmware flash bricked the device.

The installation CD was also broken (literally cracked in half) upon receipt (in a shrink-wrapped box) (I should take an egg off for this but I won't) so I've got a replacement product coming and hopefully will be reimbursed (I ordered from another site but more people come here to assess products so I thought I'd post here).

Pros: It worked great initially

Cons: Now only lets 2 devices connect, frequent connection drops, horrible experience with customer service

Other Thoughts: Would never buy from them again, I thought this modem would last much longer for the price

Pros: Compatible with then Qwest now known as Centurylink. Durable.

Cons: Set up was a little difficult with this one but not impossible.

Other Thoughts: I've had this thing for over a year and it runs 24/7 I do have to restart it about one a week now but I'm guessing thats due to the large amount of up time. This is one dependable modem.

Pros: Easy to setup, linux kernel, decent administrative interface.

Cons: Firmware upgrade failed and bricked hardware. Appeared to have some connectivity issues with my DSL.

Other Thoughts: After DSL configured connectivity seemed fine and tested at advertised speeds. However, persistent connections (i.e. IM) were dropping connections once every few minutes with socket read errors. I narrowed the issue down to either the modem or the DSL signal itself. Thought Id try upgrading the firmware, D-link's site had firmware for A/B rev, but my device seemd to indicate rev T1, but had 0.1B version elsewhere so I used B revision firmware. When I flashed firmware router went dead and no amount of resetting would fix. Dont know if I picked the wrong firmware or if the flash utility is bad or both.

Upon buyiung new modem (Netgear DM111PSP) connectivity issues vanished. I will not buy D-link again.

Pros: Easily configured, quick warm up from off-state, better data transmission rate than my old Zoom modem/router. Four ethernet ports make setting up a home network a breeze. I have two Win7 machines and Canon printer installed. Planning on adding NAS.

Cons: None so far... :)

Pros: Works with Centrylink. This thing is rock solid. Never had any downtime in the 9 months I have owned it. Awesome simple design.

Cons: Gets a little warm (but not hot) when torrenting.

Other Thoughts: Now that I have owned the modem for almost a year, I thought I would give an update to my previous review. When I first bought it, I had 3mbit/0.64mbit and I was getting over advertised speeds. I just upgraded my internet plan today and the advertised speeds are 10mbit/0.78mbit. I have been consistently doing speed tests the last 30 min and I'm getting 10.64mbit/0.76mbit. Make sure you turn off the routing functions if you have a wireless router behind it. I was able to shave 3-5ms off my ping on games just by turning this into a pure modem with a single router behind it. I highly recommend this modem. Hopefully it will last me another couple years!

Pros: Inexpensive, easy setup, works great

Cons: None

Other Thoughts: Modem has not lost connection since I started using it on 3/5/12. The modem it replaced, supplied by the internet provider, lost the connection about every other day.

Pros: Works better than my QWest modem.

Cons: Model labeling is very confusing and can causes folks to flash the wrong firmware which bricks the modem.

Other Thoughts: After harassing tech support and let them know about their confusing labeling and crapty flashing software. They agreed to let me RMA the modem. The new one arrived a few days ago and running like a champ in no time. My QWest modem got demoted into storage and back up duty if/when this thing breaks.

Their tech support does go through their boring list of trouble shoot, but will realized that you know your stuff and get to the point. Also, to me, they seems friendly and know what they are doing.