The GP-1000 GPS NTP Server Appliance, a compact DIN Rail mount time server, efficiently serves GPS time to NTP clients while providing precise GPS synchronized timecode via 1PPS and unmodulated IRIG-B outputs. Ideal for private networks requiring enhanced security, it ensures complete isolation from public networks.

By synchronizing with GPS/GNSS satellites' atomic clocks, the GP-1000 establishes a highly accurate phase-synchronized frequency and time base. It effortlessly distributes synchronized time across packet-based networks, such as Ethernet, Carrier Ethernet, IP, and IP/MPLS Networks.

NTP Server with 1PPS and IRIG-B output

Operational reliability and security for NTP clients are guaranteed with support for SHA1 and MD5 authentication for NTP requests. The GP-1000 also offers complete SNMPv3 monitoring and internal/external logging, allowing efficient tracking of alarm and error messages through SYSLOG and SNMPv3.

Seamless integration with existing enterprise directory services is possible through RADIUS for user authentication. Trust the GP-1000 NTP Server Appliance for precision and security in your network infrastructure.


High performance NTP server

Supports up to 3000 NTP requests per second

IRIG-B output

GPS synchronized unmodulated IRIG-B output

TCXO Holdover

Accurate holdover with temperature compensated TCXO

1 PPS output

GPS phase locked 1PPS output

Secure Remote Management

Configuration over SSH with password strength monitor

Flexible Power Supply

15V ~ 60V DC wide range DC input with reverse polarity protection


  • High Accuracy GPS and GNSS time reference
  • IRIG-B unmodulated outputs (1xBNC, 1xRS232, 1xRS485)
  • 1PPS output
  • Stratum 1 compliant (PR) Primary Reference Source when locked to GPS
  • High performance NTP server - Services up to 3000 NTP requests per second
  • Supports up to 15,000 NTP and SNTP clients
  • Supports Unicast, Multicast and Broadcast NTP clients
  • Leap Second correction
  • SHA1 and MD5 authentication for NTP clients
  • Temperature compensated quartz oscillators TCXO hold-over
  • Alarms and management via SYSLOG, SNMPv3
  • IPv4 and IPv6 compatible NTP Server
  • External alarm relay (NO/NC)
  • Compact DIN Rail mount form factor
  • Secure network management

Additional Features:

  • RADIUS Authentication
  • Remote management over SSH and TELNET
  • Reverse polarity protection
  • Power Contact and Lightening Protection as per Telcordia GR-1089-CORE and EN61000-4-5 Level 3 specifications
  • Encrypted firmware updgrades

Technical Specifications

Ethernet Interfaces:
Number of Ethernet Ports 1
Type RJ-45
Interfaces (1) 10/100BaseT Ethernet Interfaces: NTP Server + Management
Synchronization Outputs
IRIG-B (1) Unmodulated (RS-232)
(1) Unmodulated (RS-485 differential pair)
(1) Unmodulated (50 Ohm BNC)
B000, B002, B003, B004, B005, B006, B007
Frequency - Phase locked with GPS (1) 1 PPS - 50 Ohms BNC
Power Input
DC Input 15 ~ 60V DC
External Power Supply Options
AC Input 100V~240V AC
DC Input 110V DC
Form Factor DIN Rail Mount
GPS/GNSS Receiver Specifications:
  • 50 Channel GPS Receiver
  • 72 Channel GNSS Receiver
  • GPS L1 frequency, C/A Code Receiver
  • Tracks up to 12 satellites simultaneously
  • Synchronizing Time:
    • Acquisition time - Hot Start: Less than 15 sec.
    • Acquisition time - Warm Start: Less than 45 sec.
    • Acquisition time - Cold Start: Less than 140 sec.
  • GPS Signal
    • Tracking and Navigation: -162 dBm
    • Reacquisition -160 dBm
    • Cold Start -148 dBm
  • Integrated GPS Antenna
  • Accuracy of Time-Pulse Signal referenced to GPS: +/-30ns (raw), in Stationary Mode
  • Accuracy of Time-Pulse Signal referenced to GNSS: +/-20ns (raw) in Stationary Mode
  • Accuracy of Time-Pulse Signal referenced to GPS/GNSS: +/-15ns (compensated)
    (Note: with all satellites in view at -130db)
  • User configurable for “Stationary” or “Moving” Applications. May be configured for use in Portable, Automobile, Maritime Application Modes.
Network Time Protocol
  • NTP v2, (RFC 1119), NTP v3 (RFC 1305), NTP v4, (RFC 5905), SNTP v3 (RFC 1769), SNTP v4 (RFP 2030), SHA1/MD5 Authentication
  • NTP peering support
  • Internet Protocol: IPv4/IPv6
  • Time Protocol: TIME (RFC 868)
  • Daytime Protocol: DAYTIME (RFC 867)
Antenna Specifications
  • Integrated Antenna
  • Antenna Type: Active
  • Amplifier Gain: Typical 27dB (GPS L1 band)
  • Operating temperature: -40C to +75C
  • Lightning protection: According to EN61000-4-5 Level 4.
Communication Interfaces
Management SSH/TELNET
Integrated HTTP Interface
Serial (USB and RS232)
Reporting and Logging SYSLOG
Ordering Information


Part Code Description Options
ZZ PSU Input type AC / DC
LP Lightning Protection Kit 1 (required) or 0 (not required)


  • Telecom rack and server synchronization
  • Power generation and distribution companies and other utility companies
  • Wireless and Wireline Telecom synchronization
  • Synchronizing airports and aviation communications
  • Synchronizing railway signalling networks and railway communications
  • Synchronizing traffic management
  • Broadcasting Network and Broadcast equipment synchronization.


Data Sheet (PDF)