1.3.2 Security Enhancements
In addition to fully supporting the NENA Security Standard #75-001, the NetClock 9400 series
are security-hardened network appliances designed to meet rigorous network security stand
ards and best practices. They ensure accurate timing through multiple references, tamper-proof
management, and include extensive logging capabilities for auditing purposes. All features,
interfaces, ports, and protocols can be enabled or disabled based on your network policies.
1.4 NetClock 9489 Overview
Spectracom’s NetClock Model 9489 delivers the same high precision timing benefits of the
NetClock 9483, and is ideally suited for delivering highly precise NTP timing for syn
chronizing systems, devices, and other communications equipment and devices.
In addition to providing a secure, high precision NTP platform, NetClock 9489 also provides
one (1) 1PPS output, two (2) RS-485 outputs, and (1) RS-484 input.
There are a number of commonly shared features between both the NetClock 9483 and 9489
models. However, the NetClock Model 9489 is designed to function primarily as an NTP
server, and therefore is somewhat less complex than the NetClock Model 9483. Also, NetClock
9489 is not fully compliant to NENA master clock technical requirements. As such, a majority of
this document applies to the NetClock Model 9483, except where otherwise noted.
1.5 Inputs & Outputs
Spectracom NetClock provides multiple outputs for use in networked systems and devices. GPS-
equipped NetClocks can track up to thirty-two GPS satellites simultaneously and synchronize to
the satellite’s atomic clocks. This enables NetClock-equipped computer networks to synchronize
all elements of network hardware and software over LANs or WANs – anywhere on the planet.
1.5.1 NetClock 9483: Standard Outputs
Standard outputs are:
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CHAPTER 1 • NetClock User Reference Guide Rev. 16
1.4 NetClock 9489 Overview
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