NetClock Public Safety Master Clock

public safety master clock

The Model 9483 NENA-compliant GPS master clock continues Spectracom's legacy of bringing essential time synchronization to public safety answering points (PSAPs) and other emergency and command and control systems.

More than 4,500 PSAPs across North America trust a NetClock master clock / time server to validate 911 event records, improve response times and facilitate interoperability with Legally Traceable Time®. The latest NetClock are easier than ever to install and manage while maintaining strict compliance to the National Emergency Number Association’s (NENA) Master Clock Standard #04-002. Features support Next-Generation 911 initiatives and has been tested against NENA’s Security for Next Generation 9-1-1 Standard #075-001

General Product Features:

  • Stratum-1 NTP v2, v3, v4 Time Server
  • Precision GPS time reference with available OCXO internal time-keeping for extended holder in the event of loss of GPS
  • Supports internal audits including: audit trails, time-stamped records, log files, data archiving
  • Ethernet 10/100 Base-T (additional 3-network Gig-E option)
  • Optional PTP master/slaves
  • IPv4/IPv6 dual stack
  • Integral AC power (additional DC back-up option for power redundancy)
  • Hardened case design for vehicular applications
  • RoHS compliant/UL approved
  • 5-Year limited warranty

NetClock Compatibility with PSAP Equipment:

NetClock is endorsed and supported virtually every PSAP equipment vendor and platform, from IP-based Network Time Protocol (NTP/SNTP) systems and devices, to IRIG and RS-232 ASCII time code legacy equipment.

  • Voice Recorders
  • Radio Consoles
  • CAD
  • LAN Networks
  • Display Clocks
  • Fire Alarms
  • Video Surveillance


Applications such as emergency communications centers require reliable timing to accurately synchronize networks, systems, and devices and to log events with legally traceable time. Spectracom’s NetClock Model 9483 is ideally suited for delivering worldwide, split-second timing to mission critical systems. The 9483 is the latest generation NetClock that has set the standard for the highest reliability synchronization.

Why Time Synchronization

Improve emergency response performance and record-keeping accuracy with time synchronization

Accurate time-of-day is important in communications centers and public safety answering points (PSAPs) for time stamping events. Without accurate time, different equipment and systems display and record different times. There is no certainty of start/end times for events and tasks and you are left vulnerable to potential litigation. Time synchronization with Legally Traceable Time® is critical for records accuracy and to support legal evidence in court.

  • Improves interoperability and overall operational quality
  • Prevents conflicting records and displays
  • Establishes time and event stamps as legally traceable
  • Protects your municipality against potentially costly litigation
  • Fully automated; eliminates manual errors

Saving Time. Saving Lives.

A prime focus of Public Safety is on the critical “response time” for life-threatening events such as heart-attacks – in essence suggesting that it is a matter of minutes that determine the fate of victims. Studies have shown when dispatch and other recording systems employ synchronized time, the improved records data has resulted in measurable life saving differences to their communities.


Technical Notes and Briefs

Clock Accuracy in 911 Dispatch Centers


GPS Timing Accessories
NetClock 9483 Time Server Datasheet
NetClock GPS Command Center Package GP933M-94 for Two Networks
NetClock GPS Command Center Package GP934M-94 for Two Networks
NetClock GPS Command Center Package GP951M-94 for a Single Network
NetClock GPS Command Center Package GP952M-94 for a Single Network

Success Stories

Terrabonne Parish Communications District PSAP Sync