Ethernet to 16-Port RS-232 Serial Server

Part: 4161   Model: SeaLINK+16.232

(1 customer review)


  • Easily communicate with up to 16 serial devices over an Ethernet network
  • Appears as virtual COM ports to host machine
  • Data rates to 230.4K bps
  • Housed in rugged 1U rackmount metal enclosures

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Easily communicate with up to 16 serial devices over an Ethernet network with the 4161 Ethernet serial server. Each RS-232 port implements all common modem control signals for maximum compatibility with a wide range of peripherals. SeaLINK® products use industry-standard RFC 2217 TCP/IP protocol for maximizing compatibility with the widest range of applications and devices.

Sealevel’s SeaLINK software drivers and utilities make installation and operation easy using Microsoft Windows operating systems. After software installation, the 4161’s serial ports appear as virtual COM ports to the host machine. Standard serial operating calls are transparently redirected to the 4161, guaranteeing compatibility with legacy serial devices and enabling backward compatibility with existing software. Serial tunneling is also supported, allowing two native serial devices to communicate over a network. Alternatively, raw data socket mode is supported, eliminating the need for a driver.

The 4161 is compatible for use with Linux; please contact Sealevel Tech Support for suggested open-source software resources.

Housed in rugged 1U rackmount metal enclosures, 4161 devices are suitable for a variety of applications and environments. Power indicator LEDs are included on both the front and rear of the enclosure, and each of the 16 RJ45 serial connectors provides both Tx and Rx LED indicators to assist in troubleshooting. Standard operating temperature range is 0°C to 70°C, and extended temperature (-40°C to 85°C) models are available.

To simplify installation and configuration, a printed copy of the SeaLINK QuickStart Guide is included with all Ethernet serial server orders.


Additional information




16.75 (W) x 1.5 (H) x 7.0 (D)

Electrical Interface


Humidity Range

10 – 90% Relative Humidity, Non-Condensing

Host Interface(s)


Max Data Distance

50 feet

Max Data Rate

230.4K bps

Operating Temperature

0°C to 70°C (32°F to 158°F)

# of Ports


Power Requirement

9-30 VDC @ Min. 10W

Serial Connector(s)


Storage Temperature

-50°C to 105°C (-58°F to 221°F)

  • Ethernet 10/100BaseT (autosense)
  • Appears as virtual COM ports to host machine
  • Data rates to 230.4K bps
  • Supports custom baud rates and 9-bit protocol
  • Hot-swappable
  • Built-in watchdog/reset circuit automatically recovers the converter from unexpected error-states
  • Serial ports utilize RJ45 connectors
  • 120V AC adapter with locking connector included (12VDC @ 1A output, Item# TR125)
  • To ease installation, includes 7′ CAT5 patch cable (blue, Item# CA246) and crossover cable (yellow, Item# CA251)
  • Includes RJ45 loopback for testing RS-232
  • Sealevel SeaLINK software supports Microsoft Windows and Linux operating systems


Datasheet: 4161

1 review for SeaLINK+16.232

  1. Blaster

    Works Great
    The 4161 fulfills our needs of controlling our radios via RS232. We have been using it 24/7 for about 8 months now with no problems. The only request I have would be an on/off switch on the front or at least on the rear. Other than that we are very pleased with our unit.

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