Network Time Servers

NetClock® & Ethernet NTP Servers

Call centers, hospitals, military bases, federal or municipal agencies, financial services and technology companies, 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 (optional OCXO, 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
	Stratum-1 GPS primary time source 10/100 Base-T LAN port Time codes via two RS-232 serial ports, two RS-485 data bus ports IRIG B/E AM/TTL 1 PPS and 10 MHz Optional Rubidium or OXCO oscillator back-up for GPS Optional modem as back-up or primary Meets NENA master clock standard

	Model 9389 NetClock Time Server
	Stratum-1 GPS primary time source 10/100 Base-T LAN port Time codes via RS-232 serial port and RS-485 data bus port Optional front panel displays Optional modem as back-up or primary Ideal for synchronizing computer networks

	Model 9388 Ethernet Time Server
	Stratum-1 time server via RS-485 from any NetClock Stratum-2 network appliance time server 10/100 Base-T LAN port Time codes via RS-232 serial port and RS-485 data bus port Ideal for synchronizing a separate LAN segment

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.

SAASM interface (left) Key Fill Loader Interface and Zeroize Function for SAASM option