This document specifies a protocol suitable for simple control of a Quartz routing system by a computer or third party system. The protocol can use any of the physical interfaces available on the system, either a RS232/422 interface or Ethernet. As the protocol is ASCII text based, remote changes can be made using a terminal or a computer running terminal emulation software. For most applications only the .S command will be required to set crosspoints, with the .I or .L command to interrogate crosspoints. The .#01 command may be used at system start up to check the RS232/422 link. or a computer running terminal emulation software. For most applications only the .S command will be required to set crosspoints, with the .I or .L command to interrogate crosspoints. The .#01 command may be used at system start up to check the RS232/422 link.