Network Time Servers

NetClock^® & Ethernet NTP Servers

Call centers, military installations, federal or municipal agencies, financial services and technology firms, and many other enterprises need precision timing to support network accuracy and efficiency.

Interoperability, network/physical security; and compliance with internal policies, regulatory standards and best practices require time synchronization. For over three decades, Spectracom has been a leader in providing Legally Traceable Time^® solutions to meet the needs of the most vital time synchronization applications. The latest 9300 series NetClock^® network time servers deliver worldwide, split-second timing to mission critical systems, providing the highest levels of security, ease of management, and reliability. 3 models and numerous options are available for specific applications.

NetClock® & Ethernet Time Server Comparison Chart
	Time & Frequency Server	Network Time Server	Ethernet Time Server
Model	9383	9389	9388
Timing Reference	GPS, IRIG-B, Modem, 1PPS, NTP, (optional SAASM GPS)		Time code over RS-485, NTP
Internal Oscillator	TCXO, OCXO, Rubidium (Rb)
Standard Outputs	NTP, time code (2x) RS-232 & (2x) RS-485, alarm/timer (3x) relay
Extra outputs	IRIG, 1PPS, 10 MHz
Front panel display	2	2 optional
Network management, server, security protocols	DHCP, IPv4/IPv6 dual stack, SNMP, SSL, SSH, Syslog, RADIUS, LDAP

Detailed Feature Chart

Common Features

• Outputs: NTP thru v4, serial time codes, alarms/timers; optional: IRIG, 10 MHz, 1PPS
• Inputs: GPS, NTP peering/stratum-2; optional: IRIG, 1PPS, modem
• IPv6/IPv4 dual stack protects against network obsolesence
• SNMP with host restriction
• High bandwidth NTP performance (over 4,000 requests per second)
• Supports centralized user authentication (LDAP, RADIUS)
• Supports centralized logging (Syslog)
• SAASM GPS Receiver option

New in NetClock 9300 Series

• SAASM encrypted GPS Receiver available -- required by US Department of Defense for military applications
• Ruggedized shock and vibration-tested chassis qualified to meet MIL-STD 810F
• IPSec option to authenticate and/or encrypt each IP packet
• UL/CE/RoHS Compliant

Models

	Model 9383 NetClock Time Server
	The most feature rich NetClock for critical communications applications Includes time and frequency outputs such as IRIG, 10 MHz and 1PPS as standard Dual front panel displays and extra serial time code outputs as standard Meets the National Emergency Number Association standard for master clocks NENA master clock standard Options for enhanced holdover accuracy

	Model 9389 NetClock Time Server
	Ideal for synchronizing enterprise networks and display clocks Optional features available for specific applications

	Model 9388 Ethernet Time Server
	Leverage an existing GPS master clock by providing timing functions to an isolated LAN segment Stratum-1 accuracy via RS-485 time code Stratum-2 accuracy as an NTP client/server

	Time Server Packages
	Everything you need to deploy a GPS time server system Common configurations for redundancy and multiple networks

Time Server Solutions for Security

Security Hardened Network Appliances

With an increasing concern about cyber security, critical network devices, such as time servers, need to be designed to be free from attacks from external and internal threats. NetClock time servers integrate best practices for security hardened network appliances including SSL/SSH encryption, logging, and user management. We commonly perform vulnerability scanning to validate the results of our security approach. Contact us with your industry-specific requirements so you can rest assured that the NetClock will enhance your network security not be an exception to it.

SAASM GPS Receiver Option

GPS is an indispensable tool for synchronizing military actions and other timing applications, thanks to the GPS system’s extremely accurate and wells-ynchronized atomic clocks. However, GPS transmissions are relatively low-power and vulnerable to jamming. They may also be spoofed, a hacking technique in which seemingly legitimate data is faked.

To counter these threats, the Joint Chiefs of Staff have chosen the Selective Availability Anti-Spoofing Module (SAASM) as the GPS security architecture. As of October 2006, all newly fielded Department of Defense (DoD) GPS systems must use SAASM-compliant Precise Positioning System (PPS) devices.

A secure GPS receiver is available for SAASM applications as is required under the 2003 Joint Chiefs of Staff Instruction: Master Positioning, Navigation, and Timing Plan (CJCSI 6130.01C: Enclosure E). Learn more about this DoD mandate by reading "Enclosure E" of the document.

 
NetClock's SAASM option supports the DoD requirement for encrypted GPS.
(shown left) Key Fill Loader Interface and Zeroize Function for SAASM option

Isolated LAN Segments

Networks requiring the utmost security are often disconnected from the outside world. A NetClock GPS network time server is an ideal solution to the problem of providing Legally Traceable Time® to such an isolated network. Spectracom even offers a cost-effective solution for enterprise infrastructures that include multiple isolated network or partially isolated sub-networks.
Here’s how it works: A single GPS-based NetClock time server (models 9383 or 9389) is used as the master clock for the enterprise. One or more model 9388 ethernet time servers are connected to the GPS time server’s precision timing signal through a secure RS-485 data bus over twisted pair up that maintains stratum-1 accuracy up to 4,000 feet. The signal can be daisy-chained to support a 9388 for every isolated LAN segment in your enterprise.