Setting the Date and Time on SIP IP Telephones

SIP IP telephones need a source of date and time information. This typically comes from a network time server running the Simple Network Time Protocol (SNTP). The telephones use several administrative parameters for this functionality. The parameter SNTPSRVR defines the server’s IP Address(es). GMTOFFSET defines the offset from Greenwich Mean Time (GMT). DSTSTART and DSTSTOP define the start and end of Daylight Savings Time, respectively. DSTOFFSET defines the Daylight Savings Time offset from Standard Time. Finally, DATETIMEFORMAT defines the format of the date and time display. See Table 10 for definitions and valid values for SIP Date and Time parameters.