Selection
How to choose an industrial NTP server: QYTS-3000 vs 4000
Use QYTS-3000 for cabinet “good enough” NTP; choose the QYTS-4000 path for multi-port, rack form, and higher capacity.
Choose QYTS-3000 for single-port cabinet NTP with Modbus/1PPS/IRIG, clear capacity limits, and a shipping datasheet you can put in a contract.
Look to QYTS-4000 when you need separated management/timing ports, a gigabit path, half-width rack form, or optional OCXO/PTP SKUs.
Until the 4000 shipping datasheet is published, the site only states planned directions—do not accept against unpublished items.
Both lines emphasize BeiDou-relevant capability and localized ops UI; constellation codes follow BG/GN/BN ordering rules.
When unsure, review the selection one-pager with sales: cabinet, security, half-rack room, or power-auxiliary I/O needs.