Hubbell BR851241A Adapter Mod 851Y Splitting

Overview

The Hubbell BR851241A is a passive adapter designed to split a standard T568B wired RJ45 jack into two separate 2-pair (4-wire) connections. This is critical for installations where a single network drop must support two distinct low-power devices, such as connecting two pieces of voice equipment, ancillary data devices, or specific sensors that do not require full Ethernet bandwidth. It effectively doubles the utility of an existing RJ45 outlet without requiring new cabling runs, making it ideal for retrofits or space-constrained environments.

Compatibility

This adapter is designed to work with any standard T568B wired RJ45 jack. It supports the connection of two separate 2-pair devices. It is not intended for use with standard 4-pair Ethernet connections (e.g., 10/100/1000Base-T Ethernet) as it only passes two pairs to each output. It is suitable for voice-over-IP (VoIP) phones that use two pairs for power and data, or other ancillary equipment requiring only two pairs for operation.

Installation Notes

Installation is straightforward: simply plug the BR851241A into the existing T568B RJ45 jack. Then, connect your two 2-pair devices to the two RJ45 outputs on the adapter. Ensure that the connected devices are designed to operate on only two pairs and do not require full Gigabit Ethernet connectivity. This adapter does not provide any active signal conditioning or power, relying solely on the existing wiring and the power provided by the connected devices.