Masterclock® provides complete solutions for this vital need for thousands of satisfied customers worldwide. We manufacture high quality, cost-effective master clock and precise time solutions for clocks, computers, network and other devices. We use open standard IRIG / SMPTE Time Codes or NTP (Network Time Protocol) including the IEEE 802.3af standard for PoE (Power over Ethernet). You are not locked into proprietary systems offered by many other suppliers.