Book of RJ

The book of RJ stems from Robert J. Brennan, representing over 40 years of the manufacturing do’s and don’ts of Sentinel Connector Systems Inc. The book of RJ lays out all of the qualifications to meet industry standards the first time.
Sentinel Connector Systems is the definition of “Made in the USA.” Manufacturing all RJ-45 plugs and jacks in the United States. Robert Brennan, Found and CEO of Sentinel Connectors has been involved in the process since the first RJ-45. Robert and the Sentinel team have over 135 foreign and domestic patents related to the RJ-45 interconnect and related items.