... 500KV and above substation (the), power plants, for the wireless Ethernet backhaul, circuit emulation services, passive optical networks, and power ... CNSoptional/ IRIG-B / PTP / NTPOutput CPU onboard 4 fiber port support PTP/NTP/SNTP 1PPS/1PPM/1PPH/1PPX pulse signal ... number ≥1,000Pulse precision PPS ≤100ns IRIG-B(DC)≤50ns Serial Port ≤5μsPulse width20msAuto orphic time stabilityGreater than 1us / day ...