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Pro A/V Extender & Repeater > 
Item#: N82E16815158157

StarTech VGA Video Extender over Cat 5 with RS232 ST121UTP232

  • 300 m / 950 ft.
  • 1600x1200 @ 85Hz (Max)
  • Horizontal: 30-95KHz
  • Vertical: 50-180Hz

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Including a local transmitter and a remote receiver, the StarTech ST121UTP232 VGA extender lets you send a VGA video signal and an RS-232 data signal over a Cat5 cable to a remote destination up to 300 meters (Max.) away. You can use existing your Ethernet infrastructure wiring, eliminating the costs and hassles of using a bulky VGA and serial cable. With the RS-232 extension, you can control the projector, touch screen, or other auto control equipment from a single remote location. This kit is great for security, healthcare, traffic flow management, and more. The sleek and compact profile makes it an easy fit in any setting.

  • newegg High Resolution Supports resolutions up to 1600x1200 @85Hz for sharp, crisp images.
  • newegg Dual Output Transmitter Features one VGA output for local, and one Cat5 RJ45 output for remote.

Learn more about the STARTECH ST121UTP232




Extender & Repeater Type
Non Wall Plate Extender


300 m / 950 ft.
Frequency Band Range
Horizontal: 30-95KHz
Vertical: 50-180Hz
Resolution Support
1600x1200 @ 85Hz (Max)


Power Supply
Power Adapter Included: Two
Input Voltage: 115 AC
Output Voltage: 5 DC
Output Current: 2A
Center Tip Polarity: Positive
Plug Type: N


Cabling: Cat 5 UTP or better
Audio: No
Daisy-Chain: No

Local Unit Connectors
1 - DB-9 (9 pin; D-Sub) Female
1 - RJ-45 Female
2 - VGA (15 pin; High Density D-Sub) Female
Remote Unit Connectors
1 - DB-9 (9 pin; D-Sub) Male
1 - RJ-45 Female
1 - VGA (15 pin; High Density D-Sub) Female

Color: Black
Enclosure Type: Steel


Dual output at transmitter: 1 VGA output for local, plus 1 Cat5 RJ45 output for remote side

Each set including transmitter and receiver

Long range transmission up to 300 meters (Max.)

Send VGA and RS232 Data over one CAT5 UTP cable to instead of VGA cable and data cable

Supports up to 1600x1200 @85Hz

Dimensions & Weight

5.2"L x 3"W x 1.7"H

Package Contents

Package Content
1 - CAT5 VGA & RS232 Transmitter
1 - CAT5 VGA & RS232 Extender Receiver
2 - RJ45 Coupler
2 - Package of 4 rubber stoppers
2 - 12V DC, 500mA Power Adapters
1 - User Manual
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 STARTECH ST121UTP232

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Home > 
Components > 
Professional Video Devices > 
Pro A/V Extender & Repeater > 
Item#: N82E16815158157
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