Alcatel-Lucent OmniSwitch 6850E Series Hardware User's Manual page 111

OmniSwitch Backup Power Shelf/System (BPS)
Removing PoE Power Cords from the OS-BPS Chassis
1 Swing the retainer clip away from the power cord connector.
2 Pull the cord straight out of the connector socket.
OmniSwitch Backup Power Shelf/System (BPS)
January 2013
Disconnecting a Chassis from the OS-BPS
page 4-23