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ZOOM TELEPHONICS DOCSIS 3.0 5341-00-00J 343Mbps Cable Modem

4.2 4.2 out of 5 stars 1,640 ratings

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Purchase options and add-ons

Brand ZOOM
Connectivity Technology wired
Compatible Devices Either a Windows, Macintosh, Linux, Unix computer with an Ethernet port, or a router with an Ethernet WAN port (either a wired or wireless router) See more
Total Ethernet Ports 1
Color Black

About this item

  • Fast Internet! Up to 343 Mbps downstream and 143 Mbps upstream. Fast Ethernet port! 10/100/1000 Mbps Ethernet port connects to your Windows or Macintosh computer, router, wireless access point, HomePlug adapter, or other Ethernet-enabled device. This is MODEM ONLY
  • Supports all popular DOCSIS cable modem standards – 3.0, 2.0, and 1.1. Tested and certified by CableLabs to work with nearly all U.S. cable service providers including Comcast, Cox, Time Warner Cable, Brighthouse and Cable ONE.
  • Includes advanced networking capability including IPv4 and IPv6 for powerful, flexible network addressing.
  • Includes energy-saving switching power cube, Ethernet cable, modem stand, and Quick Start flyer.
  • Small, attractive cable modem can lie flat or stand up using the stand provided.
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ZOOM TELEPHONICS DOCSIS 3.0 5341-00-00J 343Mbps Cable Modem
ZOOM TELEPHONICS DOCSIS 3.0 5341-00-00J 343Mbps Cable Modem
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Price$74.95$39.95$99.99$44.00$172.66-31% $131.94
List:$189.99
Delivery
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Get it as soon as Monday, Mar 25
Get it as soon as Sunday, Mar 24
Customer Ratings
WiFi signal
5.0
3.5
3.8
3.9
3.7
Tech Support
5.0
2.9
3.1
3.5
3.3
Easy to install
4.9
4.2
4.4
4.4
4.2
Value for money
4.0
4.3
4.1
Sold By
Dynamic Partners
Techa Distribution
Hitron Americas
Unalans Store US
Fliptek
Amazon.com
connectivity tech
wired
Ethernet
Ethernet
Cable
Ethernet
ethernet ports
1
1
2
2
2
number of ports
1
3
6
2
data transfer rate
343 megabytes per second
1 gigabits per second
172 megabits per second
6 gigabits per second
10 gigabits per second
max downstream rate
343 megabytes per second
960 megabits per second
1 gigabits per second
343 megabits per second
686 megabits per second
10000 megabits per second
max upstream rate
123 megabytes per second
960 megabits per second
343 megabits per second
1 gigabits per second
232 megabits per second
modem type
cable
cable
data modem
cable
dsl
cable

Product Description

The Zoom Model 5341J cable modem meets the cable industry's DOCSIS 3.0 standard for speeds up to 343 Mbps, and also works with lower-speed DOCSIS 2.0 and 1.1 services. And with IPv4 and IPv6 networking support, this is a product designed and built for use today and for years to come. The Model 5341J has been tested and certified by CableLabs ® to work with nearly all U.S. cable service providers including Comcast, Cox, Time Warner Cable, and Cable ONE. The fast 10/100/1000 Mbps Ethernet port connects to your Windows or Macintosh computer, router, wireless access point, HomePlug adapter, or other Ethernet-enabled device The Model 5341J can also be plugged into routers and routers with wireless capability for sharing of your high-speed service with multiple devices. With its easy installation, high speed, and broad capability, the Model 5341J is the perfect choice for almost any cable modem user.

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Warranty & Support

Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
Product Warranty: For warranty information about this product, please click here [PDF ]

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Customer reviews

4.2 out of 5 stars
4.2 out of 5
1,640 global ratings

Customers say

Customers like the quality, ease of installation, speed and value of the networking device. They mention that its a solid modem that is compatible with the Xfinity Plus network, the quick start guide is adequate and the documentation was clear. They are also happy with connectivity, and performance. That said, some customers are mixed on compatibility, and heat.

AI-generated from the text of customer reviews

669 customers mention659 positive10 negative

Customers are satisfied with the performance of the modem. They mention that it works reliably, has no trouble, and is easy to install. Some customers also mention that the mode has never failed in any way. Overall, customers are happy with the product's performance and recommend it to others.

"...It's been wonderfully reliable, and a great performer...." Read more

"...to right this minute as I write this review, this device has worked flawlessly...." Read more

"...absolutely no problems, no need to do resets since it has never failed in any way...." Read more

"...It simply works. I started this modem off when I was subscribed to Comcast and it worked...." Read more

414 customers mention401 positive13 negative

Customers find the installation process of the network device to be easy and relatively painless. They mention that the self-provisioning is simple and easy to use, and the documentation is clear. They also appreciate the LED legend, which makes setup quick and painless, and that the internet worked immediately after a reset.

"...Setup was quick and relatively painless...." Read more

"...Easy setup with the 5341 but the key is giving it time!..." Read more

"...Maybe this has been fixed.2. Initial setup was easy, and the self-provisioning process with Comcast was easy and uneventful.3...." Read more

"...that this modem just simply does what it says it does and was a no hassle install." Read more

356 customers mention280 positive76 negative

Customers like the connectivity of the networking device. For example, they mention it's a more robust device able to connect reliably, and IP phone services flawlessly. They're also satisfied with the connection speed and stability of the Zoom 5341J, saying that the router signal is very strong throughout their house.

"...my internet speeds have been steady as a tank, and it has not disconnected one time throughout the period I've been using it (roughly 2 weeks)...." Read more

"...For the most part, this modem seems fine and it does offer eight downstream channels (which presumably will be needed for 100 mb service); the..." Read more

"...media, on-line gaming (PC, phone, iPad and Xbox Live) and IP phone services flawlessly...." Read more

"...: Zoom 5341J is an solid, elegant product that is a perfect replacement for your cable co rental...." Read more

311 customers mention273 positive38 negative

Customers like the speed of the networking device. They mention that the speed is better, the in and out signal has quit for the most part, and the wireless has improved both download and upload streaming. They also say that the home network's performance is enhanced.

"...So obviously, the Zoom is the one I've kept using. The upload speeds are equally amazing...." Read more

"...The speed actually almost doubled with this modem as the Comcast was leasing me an older modem that didn't even have the capability to offer the..." Read more

"...It improved the speed of my connection and showed that my signal power levels were in the DOCSIS 3.0 specifications..." Read more

"...This thing is faster than Comcast's whizbang modem, and it saves us money. What's not to like?..." Read more

197 customers mention192 positive5 negative

Customers appreciate the value of the networking device. They mention it's worth the price, and they are pleased with the price and performance. They also appreciate the lack of a rental fee or monthly charges.

"...I would highly recommend this product based on setup, performance and price." Read more

"...This thing is faster than Comcast's whizbang modem, and it saves us money. What's not to like?..." Read more

"...It was NOT the problem at all. It is well worth the money, will pay for itself easily, and is an easy install...." Read more

"...This modem rocks and is much cheaper than arris surfboard modem. I would highly recommend!..." Read more

159 customers mention124 positive35 negative

Customers like the quality of the modem. They say it's easy to set up and reliable. The modem is well-made and has excellent stability and speed. Some customers say that it hasn't failed once and has 100% uptime.

"...Decent cardboard box that protect's its contents. baffling inside the box designed to hold the contents snug...." Read more

"...Bottom line: Zoom 5341J is an solid, elegant product that is a perfect replacement for your cable co rental...." Read more

"...After year in service at home, this modem had 100% uptime - no glitches whatsoever...." Read more

"...Two negatives: The first modem I had was faulty and had to be returned, but crap happens...." Read more

121 customers mention82 positive39 negative

Customers are mixed about the compatibility of the networking device. Some mention that it works with Comcast to allow them to drop that $10/month charge, while others say that it does not work with VOIP and that the printer does not works. Some customers also mention that the settings and firewall off options do not appear to work, and that some sites are just not loading.

"...3. Initial channel bonding occurred very quickly.Bad1. Unlike the SB6120, this modem's Web UI has no event logging...." Read more

"...It works with my Netgear Router with no issues.Two negatives: The first modem I had was faulty and had to be returned, but crap happens...." Read more

"...Surprise, this modem didn't work either...." Read more

"...compatible with Comcast, and b)..." Read more

62 customers mention29 positive33 negative

Customers have mixed opinions about the heat of the networking device. Some mention that it doesn't heat up too much, while others say that it runs a bit warm and the heat ventilation seems to be primarily on top.

"...5. Although I didn't measure scientifically, the Zoom produces significantly less heat than the Ambit did...." Read more

"...thing I noticed like other reviewers have commented on was the 5341J runs pretty warm compared to the last few modems and I have used so I have..." Read more

"...But, I like the Zoom's temp coolness and the way it was simple to hook up...across the board.....plus an increase in stability as it relates to..." Read more

"...This modem *will* run hot if you are not careful. Placed flat on a carpet, the carpet will prevent proper cooling...." Read more

Out of the box inspection, installation, and testing. Comcast Houston. Love it.
5 Stars
Out of the box inspection, installation, and testing. Comcast Houston. Love it.
This review is an "Out of the box installation, and testing" type review. I have had the modem in my possession for less than 24 hours, so I honestly can't say much about stability or long term reliability yet. I do intend on updating my review as I have more exposure to this device.After getting annoyed one too many times for paying a $7.00 / month lease fee to Comcast for the AMBIT U10C035 DOCSIS 3.0 modem that replaced the older Motorola Surfboard modem I had when the cable service in my area used to be Time Warner / Roadrunner. Well I decided to buy my own modem and bypass the middle man.After doing some thorough research of online reviews, I had the choices narrowed down to this modem, the Motorola SB6120, and the Motorola SB6121. Several factors, including the overwhelming positive reviews of this modem here, and on DSLreports.com, not to mention the recommendation of several Comcast cable technicians made me opt in favor of the Zoom modem.Now the last time I had purchased, or even considered Zoom equipment, it was a 33.6 kbps internal PCI modem I had installed in a Pentium 166 MMX box running Windows 95. Not exactly current. My experience with their hardware was positive, and I have never had a reason to doubt the quality of the design, or build of their devices. Just didn't have a need until now.First thing I noted when it came in is how well the item is packaged. Decent cardboard box that protect's its contents. baffling inside the box designed to hold the contents snug. The modem itself well wrapped, and the box as well fully plastic wrapped. Maybe not the best for allowing the plastics to outgas, but I digress...Included in the box was.#1. Zoom 5341j cable modem.#2. Wall wart type transformer.#3. Short, BRIGHT yellow ethernet cable.#4. Funny looking little foot thing a ma jig used as a stand. Mine will be shelf mounted eventually in a relay rack in my home office, the little foot isn't needed, but would be nice if I didn't have my setup planned the way I do.#5. Quick installation guide type pamphlet.Physically there are a couple of noteworthy things about this modem.#1. Matte black finish of the housing fits in very nicely with modern office and particularly home office decor.#2. Multiple, flexible mounting options. The only real mounting option this lacks, and it is one for my application annoys the snot out of me, is it lacks any means of attaching rack mount ears. So if you are doing a structured wiring install, using a relay rack or similar setup, you will have to use a shelf on the rack for your modem. For the most part, almost all current broadband modems and routers are like this. I guess the MFGs don't figure home or SOHO installs will use racks.#3. Much, MUCH brighter status LEDs than the Ambit, or Moto modems I have had in the past. There is no guessing to the status of a particular function of the modem in a bright office. I bet the lights could be annoying in a bedroom at night though.#4. Smaller footprint than the Ambit or Moto modems. Agan, for the most part no big deal, but again, for those doing structured wiring, say you are doing a mount board install in a closet, or basement. Or worse, an actual structured wiring enclosure. The smaller device is priceless in space confined areas.#5. Although I didn't measure scientifically, the Zoom produces significantly less heat than the Ambit did. For the most part, the Zoom seems to be running just a touch over room temp, the Ambit always gave me pause as it ran hot enough ti was concerned it would melt the plastic or worse.#6. Unless you have everything at the same desk area, forget the included ethernet cable. Too short to be useful.#7. The little foot thingy installs and removes fairly easily from the modem allowing you to stand it up like a book on a booshelf. Nice option if you need that.#8. The wall wart transformer. You'd think by now, manufacturers could figure out how to integrate the power supply INTO the housing of the modem. I hate external transformers. This one at least is one of the sideways ones so you can actually use it in a power strip, at least that's something.Setup was quick and relatively painless.#1. Get online, go to Comcast website, log in, then copy / paste my account number to a plain text file.#2. disconnect my existing cable modem.#3. Connect coax, power cable, and an ethernet cable from the wired workstation to the new cable modem.#4. Power the cable modem up and wait for all the lights except the last one on the right to stop blinking. The last one on the right if it blinks means data is getting passed...#5. Set my workstation to DHCP for adddress and DNS configuration. You can bypass this step if you are using DHCP, I am not.#6. Flush old IP, and obtain new ip address. (For Windows XP run ... ipconfig /release, ipconfig /renew).#7. Open web browser nd try to surf to a site. You will get taken to the self activation page.#8. Follow the simple to understand on screen prompts.#9. Once it shows up as activated, and confirms you are done, it will prompt you to close the window. Do so now.#10. Browse to a site or two, pull up amazon.com, google.com, whatever verify your function.#11. Push the button on the back of the modem and power it off. (How cool is that, an actual way to power cycle the modem without yanking the power cord!)#12. Connect ethernet cable from router to modem. Reconnect worksation cable from router to workstation.#13. Powe roff your router.#14. Power on your modem. Wait for it to fully initialize.#15. Power on your router. Wait for it to fully initialize.#16. Obtain new DHCP address by release / renew mentioned above, or reset your static IP addressing.#17. Log in to your router admin panel, and verify IP configuration is good.#18. From your worksation / browser, start browsing the internet.All told, my setup took all of 15 minutes. The overwhelming majority of that time was spent waiting on the Comcast website to do its thing.Prior to, and just after installing my modem, I ran several broadband speed tests to verify function.First testing was done at [...]My test prior to swapping the modem out came in with 24.86 mbps down 3.28 mbps up.My test after swapping the modem out resulted in 33.18 mbps down, and 3.74 mbps up.The results from testmy.net are similar.Prior to swapping the modem out I got 20 mbps down, and 1.8 mbps up.Post modem swap I am getting 24.9 mbps down, and 3.6 mbps up.I should also mention that I bumped my service tier up after the post modem test (I had intended to do that, and was part of the reason I got this modem). I am now on the Extreme 50/10 tier. My speed scaled right along with the tier inline with what I was seeing before.Download of 67.85mpbs, up of 9.89mbps.At the time of this test, for some reason I was unable succesfully run a speed test from [...] The Flash test app on their site kept hanging my browser something fierce.Overall browsing seems snappier, but it's not like it was a problem before. For the most part, I am limited to the speed of the connection the servers I am talking to, which makes me a happy camper. Youtube can still be choppy, but I have seen that across various networks, and the problem is Youtube. Netflix is smooth as silk, and a joy to watch. I am not much of a gamer, other than Facebook games. And those, well they don't appear to have been impacted at all.At this point, assuming no stability or reliability issues, there are 3 things I would like to see Zoom change about this device to make it more appealing to me.#1. Wrap the lenses for the LEDs around further to the front. This will make viewing the LEDs from just below the modem much easier.#2. Integrate the power supply into the modem housing.#3. Slightly modify the case design to allow for, and include, or offer as an accessory, rack mounting ears for the device. I know I am the odd man out here as it were, but it would be nice..UPDATE: 3/31/17. I have owned this modem for 4 years and pretty close to 2 months. We are going to call it 50 months. I am saving $8.00 a month plus So effectively this modem has saved me after purchase price close to $440.00, and I can manage my own modem without Comcast sticking their nose into it. It's been wonderfully reliable, and a great performer. I am tempted by the newer 4x16 DOCSIS 3.0 modems, but our service here won't support them anyway. Might as well stick with the 4x8. I should mention my first modem, a dial up 2400 baud modem in the 1980s was a Zoom, my 33.6, and 56K modems were Zoom, I am glad beyond words that Zoom has kept their quality high over the literally decades. I deal with IT all day long and have seen a lot of junk networking gear on the market. This is a good modem.
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Top reviews from the United States

Reviewed in the United States on February 8, 2013
Customer image
5.0 out of 5 stars Out of the box inspection, installation, and testing. Comcast Houston. Love it.
Reviewed in the United States on February 8, 2013
This review is an "Out of the box installation, and testing" type review. I have had the modem in my possession for less than 24 hours, so I honestly can't say much about stability or long term reliability yet. I do intend on updating my review as I have more exposure to this device.

After getting annoyed one too many times for paying a $7.00 / month lease fee to Comcast for the AMBIT U10C035 DOCSIS 3.0 modem that replaced the older Motorola Surfboard modem I had when the cable service in my area used to be Time Warner / Roadrunner. Well I decided to buy my own modem and bypass the middle man.

After doing some thorough research of online reviews, I had the choices narrowed down to this modem, the Motorola SB6120, and the Motorola SB6121. Several factors, including the overwhelming positive reviews of this modem here, and on DSLreports.com, not to mention the recommendation of several Comcast cable technicians made me opt in favor of the Zoom modem.

Now the last time I had purchased, or even considered Zoom equipment, it was a 33.6 kbps internal PCI modem I had installed in a Pentium 166 MMX box running Windows 95. Not exactly current. My experience with their hardware was positive, and I have never had a reason to doubt the quality of the design, or build of their devices. Just didn't have a need until now.

First thing I noted when it came in is how well the item is packaged. Decent cardboard box that protect's its contents. baffling inside the box designed to hold the contents snug. The modem itself well wrapped, and the box as well fully plastic wrapped. Maybe not the best for allowing the plastics to outgas, but I digress...
Included in the box was.
#1. Zoom 5341j cable modem.
#2. Wall wart type transformer.
#3. Short, BRIGHT yellow ethernet cable.
#4. Funny looking little foot thing a ma jig used as a stand. Mine will be shelf mounted eventually in a relay rack in my home office, the little foot isn't needed, but would be nice if I didn't have my setup planned the way I do.
#5. Quick installation guide type pamphlet.

Physically there are a couple of noteworthy things about this modem.
#1. Matte black finish of the housing fits in very nicely with modern office and particularly home office decor.
#2. Multiple, flexible mounting options. The only real mounting option this lacks, and it is one for my application annoys the snot out of me, is it lacks any means of attaching rack mount ears. So if you are doing a structured wiring install, using a relay rack or similar setup, you will have to use a shelf on the rack for your modem. For the most part, almost all current broadband modems and routers are like this. I guess the MFGs don't figure home or SOHO installs will use racks.
#3. Much, MUCH brighter status LEDs than the Ambit, or Moto modems I have had in the past. There is no guessing to the status of a particular function of the modem in a bright office. I bet the lights could be annoying in a bedroom at night though.
#4. Smaller footprint than the Ambit or Moto modems. Agan, for the most part no big deal, but again, for those doing structured wiring, say you are doing a mount board install in a closet, or basement. Or worse, an actual structured wiring enclosure. The smaller device is priceless in space confined areas.
#5. Although I didn't measure scientifically, the Zoom produces significantly less heat than the Ambit did. For the most part, the Zoom seems to be running just a touch over room temp, the Ambit always gave me pause as it ran hot enough ti was concerned it would melt the plastic or worse.
#6. Unless you have everything at the same desk area, forget the included ethernet cable. Too short to be useful.
#7. The little foot thingy installs and removes fairly easily from the modem allowing you to stand it up like a book on a booshelf. Nice option if you need that.
#8. The wall wart transformer. You'd think by now, manufacturers could figure out how to integrate the power supply INTO the housing of the modem. I hate external transformers. This one at least is one of the sideways ones so you can actually use it in a power strip, at least that's something.

Setup was quick and relatively painless.
#1. Get online, go to Comcast website, log in, then copy / paste my account number to a plain text file.
#2. disconnect my existing cable modem.
#3. Connect coax, power cable, and an ethernet cable from the wired workstation to the new cable modem.
#4. Power the cable modem up and wait for all the lights except the last one on the right to stop blinking. The last one on the right if it blinks means data is getting passed...
#5. Set my workstation to DHCP for adddress and DNS configuration. You can bypass this step if you are using DHCP, I am not.
#6. Flush old IP, and obtain new ip address. (For Windows XP run ... ipconfig /release, ipconfig /renew).
#7. Open web browser nd try to surf to a site. You will get taken to the self activation page.
#8. Follow the simple to understand on screen prompts.
#9. Once it shows up as activated, and confirms you are done, it will prompt you to close the window. Do so now.
#10. Browse to a site or two, pull up amazon.com, google.com, whatever verify your function.
#11. Push the button on the back of the modem and power it off. (How cool is that, an actual way to power cycle the modem without yanking the power cord!)
#12. Connect ethernet cable from router to modem. Reconnect worksation cable from router to workstation.
#13. Powe roff your router.
#14. Power on your modem. Wait for it to fully initialize.
#15. Power on your router. Wait for it to fully initialize.
#16. Obtain new DHCP address by release / renew mentioned above, or reset your static IP addressing.
#17. Log in to your router admin panel, and verify IP configuration is good.
#18. From your worksation / browser, start browsing the internet.

All told, my setup took all of 15 minutes. The overwhelming majority of that time was spent waiting on the Comcast website to do its thing.

Prior to, and just after installing my modem, I ran several broadband speed tests to verify function.

First testing was done at [...]
My test prior to swapping the modem out came in with 24.86 mbps down 3.28 mbps up.
My test after swapping the modem out resulted in 33.18 mbps down, and 3.74 mbps up.

The results from testmy.net are similar.
Prior to swapping the modem out I got 20 mbps down, and 1.8 mbps up.
Post modem swap I am getting 24.9 mbps down, and 3.6 mbps up.

I should also mention that I bumped my service tier up after the post modem test (I had intended to do that, and was part of the reason I got this modem). I am now on the Extreme 50/10 tier. My speed scaled right along with the tier inline with what I was seeing before.

Download of 67.85mpbs, up of 9.89mbps.

At the time of this test, for some reason I was unable succesfully run a speed test from [...] The Flash test app on their site kept hanging my browser something fierce.

Overall browsing seems snappier, but it's not like it was a problem before. For the most part, I am limited to the speed of the connection the servers I am talking to, which makes me a happy camper. Youtube can still be choppy, but I have seen that across various networks, and the problem is Youtube. Netflix is smooth as silk, and a joy to watch. I am not much of a gamer, other than Facebook games. And those, well they don't appear to have been impacted at all.

At this point, assuming no stability or reliability issues, there are 3 things I would like to see Zoom change about this device to make it more appealing to me.
#1. Wrap the lenses for the LEDs around further to the front. This will make viewing the LEDs from just below the modem much easier.
#2. Integrate the power supply into the modem housing.
#3. Slightly modify the case design to allow for, and include, or offer as an accessory, rack mounting ears for the device. I know I am the odd man out here as it were, but it would be nice..

UPDATE: 3/31/17. I have owned this modem for 4 years and pretty close to 2 months. We are going to call it 50 months. I am saving $8.00 a month plus So effectively this modem has saved me after purchase price close to $440.00, and I can manage my own modem without Comcast sticking their nose into it. It's been wonderfully reliable, and a great performer. I am tempted by the newer 4x16 DOCSIS 3.0 modems, but our service here won't support them anyway. Might as well stick with the 4x8. I should mention my first modem, a dial up 2400 baud modem in the 1980s was a Zoom, my 33.6, and 56K modems were Zoom, I am glad beyond words that Zoom has kept their quality high over the literally decades. I deal with IT all day long and have seen a lot of junk networking gear on the market. This is a good modem.
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Reviewed in the United States on June 29, 2014
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Reviewed in the United States on August 29, 2014