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StarTech DB9 RS232 Serial Null Modem Adapter - M/M (NM9MM)

4.0 out of 5 stars 9 customer reviews

Price: $2.04 & FREE Shipping on orders over $49. Details
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  • Converts a straight through serial cable in to a null modem cable
  • Easy to use and install
  • Backed by StarTech.com lifetime warranty
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$2.04 Add-on Item & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • StarTech DB9 RS232 Serial Null Modem Adapter - M/M (NM9MM)
  • +
  • StarTech DB9 RS232 Serial Null Modem Adapter - F/F (NM9FF)
  • +
  • C2G / Cables To Go 02782 DB9 M/M Serial RS232 Mini Gender Changer (Coupler)
Total price: $7.23
Buy the selected items together


Technical Details

  • Brand Name: StarTech
  • Model Number: NM9MM
  • Hardware Platform: Pc
  • Length: 4.00 inches
  • Manufacturer Warranty Description: Lifetime warranty

Product Description

This Null Modem Adapter features two DB9 male connectors - a cost-saving way to convert a straight through cable into a null modem cable. The DB9M Null modem cable adapter is backed by lifetime warranty and free lifetime technical support.

Product Information

Product Dimensions 3.2 x 0.8 x 5.9 inches
Item Weight 0.8 ounces
Shipping Weight 0.8 ounces (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
ASIN B000F43X4G
Item model number NM9MM
Customer Reviews
4.0 out of 5 stars 9 customer reviews

4.0 out of 5 stars
Best Sellers Rank #4,135 in Electronics > Accessories & Supplies > Computer Accessories > Computer Cable Adapters
#5,606 in Electronics > Accessories & Supplies > Audio & Video Accessories > Connectors & Adapters
Date first available at Amazon.com July 7, 2004

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Customer Reviews

Top Customer Reviews

Verified Purchase
This works with VERY old computer systems. This item arrived on time and is an excellent purchase. I like it very much and am VERY glad I ordered it. Thank you so much Amazon.com for the great price, good value and prompt delivery. I use this item frequently.
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Verified Purchase
I recently purchased a Uniden BCD396XT Handheld TrunkTracker IV Digital Police Scanner. It has a feature to open and close scanning frequencies based upon the location of the radio. One needs to connect a GPS to the radio to use the feature.

I already had a Garmin eTrex GPS with serial cable. The Uniden has a serial cable as well. The StarTech serial null modem adapter connected the two cables so the GPS and Uniden could communicate the location information.

At the end of the day, this is a null modem adapter. It is not a life changing purchase. It did do what I wanted it to do. I can now fully use the features of the Uniden with an otherwise unused GPS unit.
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Verified Purchase
I was looking at buying the much cheaper male gender/null adapter Amazon sells. The intelligent reviews stated the product wasn't as advertised. Went with this one and it delivers. The designers knew that is cable would be used in somewhat unique fashions. They included 4 doubled threaded nuts that allows the screw-in posts to be utilized if attaching cables have same the posts. These were used for my application. Very adaptable adapter.
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Verified Purchase
This is not the same item in picture that I ordered. I had to do a job that required the correct item that following week and was unable to perform the duty required.
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Verified Purchase
Works great with Uniden Home Patrol Scanner serial GPS cable joining requirements.

Uniden Home Patrol needing this in the first place is another review.
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