Kenneth D Graham

US Patent:

8380256, Feb 19, 2013

Filed:

Jul 17, 2007

Appl. No.:

11/778703

Inventors:

Mark Henneberg - Olathe KS, US
Kevin Kenny - Ashburn VA, US
Kenneth J. Graham - Parkville MO, US

Assignee:

Sprint Communications Company L.P. - Overland Park KS

International Classification:

H04B 1/38
H02J 3/12
G05F 1/10
G06F 1/00

US Classification:

455572, 323234, 713300

Abstract:

A failsafe protection system for a distributed telecommunications site ties power shut off to a network interface unit to power supply conditions at a base transceiver station. In one aspect, the system is integrated with circuitry at the distributed telecommunications site, and includes an electrical power supplying device, a low voltage disconnect and a relay coupled with a DC bus. Additionally, the failsafe protection system includes a first circuit pathway coupling the base transceiver station electronics to the low voltage disconnect and a second circuit pathway coupling the network interface unit to the DC bus through the relay. Both the low voltage disconnect and the relay selectively control the coupling of the base transceiver station and the network interface unit, respectively, with the DC bus.