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Item#: 9SIA1N82KJ1971

U.S. Robotics USR3453C Courier Global Business Modem 56Kbps RS-232 (Serial Port) ITU V.92/V.90 up to 56 Kbps downloads Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21 ITU V.34 at 33.6 Kbps or 28.8 Kbps V.32 at 19.2 Kbps

  • 56Kbps
  • RS-232 (Serial Port)
  • 2 x RJ11 ports
  • ITU V.92/V.90 up to 56 Kbps downloads
  • Data: V.92, V.90, V.34, V.32bis, V.32, V.22bis, V.22, V.23, and V.21
  • ITU V.34 at 33.6 Kbps or 28.8 Kbps
  • V.32 at 19.2 Kbps (21.6 Kbps between Courier modems with ASL)
  • ITU V.32bis at 14.4 Kbps
  • HST at 16.8 Kbps
  • Compatible with most ITU and Bell standards down to 300 bps
  • Data Error Control; Compression: V.42/V.42bis and MNP2-4/5
  • Fax: ITU V.17 at 14.4 Kbps, ITU V.29 at 9600 bps, ITU V.27ter at 7200 bps, Group III, TIA/EIA 578 Class 1, and TIA/EIA 592 Class 2.0
  • Caller ID and distinctive ring (require service from your local phone company/Caller ID may not be supported in some countries).

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the US Robotics USR3453C

Warranty, Returns, And Additional Information

Customer Reviews of the US Robotics USR3453C

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  • Chris H.
  • 10/6/2014 10:42:52 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWell worth the money

Pros: This is the only modem that would connect with older analog style security gates, even after trying several other US Robotics models. This will connect with every system perfectly.

Cons: Price a little high

Did you find this review helpful? Yes No

5 out of 5 eggsBlast from the Past!

Pros: I was rummaging through some boxes while cleaning out my parents' old house, and found one full of old floppies and modems from the late 80's and early 90's. One of them was the predecessor to this modem - the 19.2kbps version - you know - from when v.32bis was the big thing.

Even after sitting in their garage from the time I left high school in the early 90s until now, the USR Courier works splendidly. Most of those old floppies are still readable, too, so now I'm setting up some DOS virtual machines to see if I can get my old BBS running again.

Far out!

Cons: None at all

Other Thoughts: Newegg needs a "More than 20 years" option for "Ownership"

Did you find this review helpful? Yes No

  • Chris V.
  • 12/1/2011 2:21:19 PM
  • Ownership: more than 1 year

5 out of 5 eggsWorkhorse

Pros: I work in an industry where we still need to use modems for dialup support. This is the only modem that works 100% of the time at every site we dial into, and this is the first time I'm buying a replacement for one that broke- IN 10 YEARS

Cons: I still need to use modems. But I guess that's a life con and not a product con.

Other Thoughts: I'm shocked they still sell these. And I LOLed that someone posted a 1 egg review because it's "slow"

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

  • Dave S.
  • 8/23/2010 11:23:37 AM
  • Ownership: less than 1 day
  • Verified Owner

1 out of 5 eggsPoor Performance

Pros: None.

Cons: Terrible performance. This modem performed worse than the $40 Zoom modem it was supposed to replace. Tried various init strings with no affect.

1 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 8/30/2009 10:29:26 PM
  • Ownership: more than 1 year

5 out of 5 eggsBest Modem on market since '96

Pros: Best comparability on the market, slide volume switch is great for when people are sleeping. Will connect to anything.

Cons: It's Dialup :)

Other Thoughts: I've had one of these modems since 1995 or so when I ran a BBS ( bulletin Board system for those who are too young to know). It's the best modem on the market for anyone who needs one for business or even the old BBS's that may be in existence still.

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

  • Michael T.
  • 10/2/2007 12:39:49 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsWorst Technical Support - BAR NONE

Pros: Supposedly the best business modem out there

Cons: Serious hazard to your health and emotional well-being

Other Thoughts: The technical support is just awful. I'm usually very understanding of folks who don't speak english as their first language but the communication skills of the tech support are awful. One technician put me on hold for 30 minutes while reading the manual and had no clue about modems - forget about hyperterminal or anything of that sort. After multiple troubleshooting rounds, I requested a RMA and I had to speak to 5 people for 2 hours to make it happen. They finally shipped the modem to the wrong address (in their defense, they got the city and state right but everything else wrong). I'm still trying to resolve this and if nothing else gives me a heart attack, this most likely will.

As far as I remember, USR had an outstanding reputation but I doubt my case is an exception.

7 out of 12 people found this review helpful. Did you? Yes No

  • Bedford T.
  • 6/23/2007 12:47:43 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

3 out of 5 eggsHorrid Tech Support

Pros: Could be a great modem.

Cons: Just do not need technical support. Techs speak very poor english. They will try their best not to issue a case number - one even pretended to issue a case number. So when you call back in you have to repeat all the info to someone that can barely understand you. Try doing something hairy like a firmware update using hyperterminal with someone instructing you that 1. does not know how to do it and 2. with a huge language barrier
My tech guy hung up on me minutes after turning the modem into a door stop by botching a firmware update. I own a tech co. so I did not add to the problem. We need to understand one another to be effective.

Other Thoughts: tech support is the worst I have ever encountered. Not once but the 5 times I have phones in. This company must provide zero oversight in tech support. I needed it for server fax. The firmware update resolves the issue of it NOT FAXING on Win2003 very well, if at all.

4 out of 8 people found this review helpful. Did you? Yes No

  • Anonymous
  • 3/24/2007 9:56:06 AM
  • Ownership: more than 1 year

5 out of 5 eggsThe BEST dial-up modem ever made!

Pros: The BEST dial-up modem ever made, period! High rate rates even on noisy lines, status lights to see what's going on. Everything is done on local CPU, so there's no operating-system dependencies and no overhead on yours (it's NOT a "winmodem"). If you're stuck using dial-up, at least treat your self to one of these.

Cons: Buying a new one is expensive. But there are options.

6 out of 8 people found this review helpful. Did you? Yes No

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Item#: 9SIA1N82KJ1971
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