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ET1551U - Nitek


The ET1551U Transmitter unit is another component of the Nitek cutting edge Etherstretch™ line. The ET1551U solution allows for the utilization of existing 2 wire UTP cable infrastructure to transmit data from IP Network devices for distances up to 300 meters (1.000 feet) when connected with an ER1551U single channel or ER1651U multi-port Receiver unit.

Product Description

The ET1551U Transmitter unit is another component of the Nitek cutting edge Etherstretch™ line. The ET1551U, when connected to an ER1551U or ER1651U Receiver unit can quickly turn any ordinary Single Twisted Pair wire into a high speed network communication for distances up to 300 meters (1.000 feet). Nitek Etherstretch™ ET1551U Transmitter Extends Network communications to overcome cable distance limitations to devices in locations traditional networking does not allow. The ET1551U is ideal for retrofitting existing installations. The units are constructed of industrial grade RoHS compliant plated aluminium with a corrosion resistant finish making them very durable.

The ET1551U Transmitter requires very little installation time and absolutely no set up or configuration. The ET1551U is transparent to the network requiring no IP or MAC addressing. Simply connect your network devices to the network ports of the Transmitter and Receiver along with existing cabling and the system begins communicating. The Receiver ER1551U is capable of providing power for the ET1551U Transmitter, without the need for an external power supply.

The ET1551U can also be powered directly to provide 802.3at 25.5 watts to the camera (PS48 sold seperately). LED indicators show the status and speed of network communications.


• Environmentally hardened – meets NEMA TS-1/TS-2 • Supports 10/100 over UTP rated cables up to 300 meters (1.000 feet) • Transparent to the network • Supports any network device, including Mega-pixel technology IP cameras • Easy to install, no set up required • No MAC or IP addressing required • LED indicators for network signals, link status and power • Optional power supply can insert PoE power for non-PoE switches • Ground loop isolation • Made in the U.S.A.

Tech Specs

Size 1.1″H x 1.6″W x 4.6″D (including tabs)
Power Requirements PoE (IEEE 802.3af or at) or PS48 Power Supply
Ethernet Connection [1] Auto Configuring 10/100 RJ45 port
EtherStretch Link Connection [1] RJ45 port
LED Indicators Link Status, Power, PoE Out, 10Mb or 100mb
Shipping Weight 2 lbs.
Mounting Two 3/8 inch mounting slots
Operating Temperature -40 to 75 degrees C/-40 to 167 degrees F
Environmental NEMA TS-2 (see spec sheet download)


ET1551U Specification Sheet Last Updated: December 12, 2017
ET1551U Installation Manual Last Updated: September 6, 2017