Color codes for cross-connection fields have been used for many years. Which color is used to identify network connections?

Green is designated for network connections in ANSI/TIA-606-B and legacy Bell System cross-connect color coding standards, specifically identifying circuits and terminations from the local exchange carrier (LEC) or public switched network. This color assignment allows technicians to quickly distinguish incoming network circuits from internal cabling and other equipment types at the cross-connect field.

Orange is used to identify demarcation point connections or central office equipment interfaces, not general network connections.

Purple is designated for connections to common equipment such as PBX systems, host computers, or multiplexers.

Yellow is used for auxiliary circuits, alarm systems, and security connections.

Brown is designated for inter-building backbone cabling connections.