Thank you for viewing. This is a connection cable with a white cable and two yellow modular connectors. - Connector color: Yellow - Cable color: White - Connector type: Modular connector RJ-11 type 6-pin 4-core: This type is often used in telephone equipment for businesses. It is also used in alarm systems and multi-function telephones. Cable shape: Standard type This is a general round cable. It is durable and resistant to noise. This cable was not used with NTT Hikari Flet's.