Siemens Argus 7SR21 - Page 474

7SR220 Technical Manual
Chapter 4 - Page 94 of 96 © 2017 Siemens Protection Devices Limited
Start Bit
Bit (logical 0) sent to signify the start of a byte during data transmission.
Stop Bit
Bit (logical 1) sent to signify the end.
USB
Universal Serial Bus standard for the transfer of data.
WAN
Wide Area Network. A computer network covering a large geographic area.