GPS / GNSS Time Servers
VCL-Mega, NTP Time Server

VCL Products > GPS / GNSS Time Servers > VCL-Mega, NTP Time Server

VCL-Mega, NTP Time Server
VCL-Mega, NTP Time Server
VCL-Mega, NTP Time Server
VCL-Mega, NTP Time Server

VCL-Mega, NTP Time Server

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VCL-Mega, NTP Time Server is a high-availability, high performance GPS / GNSS (Global Navigation Satellite System) NTP server that can used to provide time at a national, state or an institutional level. The VCL-Mega, NTP Server can be configured to provide up to 16 x 1G/10G NTP outputs which are locked to 1+1 Redundant GPS GPS/GNSS Receivers. Alternately, the same may also be configured to use a 1 PPS source from a private (local) Cesium source.

The VCL-Mega NTP Time Server equipped with a high bandwidth, 16 Core NTP Server engine which is designed to serve up to One Million NTP requests per second. A total of 16 x 1G or 10G ports are available in any combination in increments of 4 x 1G or 10G ports per slot (i.e., a total of 4 x slots = 16 x ports). Each 1G port is capable of handling up to 12,000 NTP requests per second and each 10G port is capable of handling up to 120,000 NTP requests per second.

Features and Highlights

  • Integrated, Dual (1+1) GPS / GNSS Receivers with automatic failover function
  • Functions as a Primary NTP Server
  • Automatic failover function to a Secondary NTP Server, in the absence of internal GPS Signal
  • High bandwidth NTP performance
  • Supports up to 16 NTP Ports – each with separate IP address
  • Up to 12,000 NTP requests per second per 1G port
  • Up to 120,000 NTP requests per second per 10G port
  • The system can be installed with multiple NTP Ports - 16 x Independent 1G or 10G ports - in any combination
  • May be used to support 10 Million NTP / SNTP Slaves from a single VCL-Mega NTP Server unit
  • May be configured so that all 16 NTP Ports serve a common URL using NAT protocol
  • Supports Unicast, Multicast, Broadcast
  • Leap Second correction support
  • MD5 authentication for NTP clients
  • Alert notifications via SNMP Traps, SNMPv2, SNMPv3, SMTP (Email)
  • Concurrent IPv6 and IPv4 operation
  • Supported network protocols: IPv4, IPv6, SSH, TELNET, FTP, SYSLOG, SCP, SFTP
  • DHCP Support
  • Secure network management: enable or disable options
  • Double Oven Quartz Oscillators (OCXO) hold-over
  • 1+1 Redundant AC Power Supply option

Security and Protection:

  • Password Protection with password strength monitor
  • SSH.
Inputs: GPS/GNSS, NTP Time Source, 1PPS
Outputs:
  • Up to 16 x NTP Ports – 1G electrical / optical, or 10G optical ports
  • Automatic failover function to a secondary NTP Server, in the absence of internal GPS Signal
  • ITU-T G.812 compliant holdover
    [OCXO (Double Oven-Controlled Crystal Oscillator)]
Power Supply: 110~240V AC, 1+1 Redundant Hot-swappable PSU
Service Capacity: Suitable for servicing up to 1 Million NTP / SNTP requests per second.

Firewall Features:

  • Resilient to DoS attacks.
  • Integrated Firewall features.
  • White List (may be used to allow only select IP address and IP domains that shall be allowed to access and update time from the VCL-Mega NTP Server).
  • Black List (may be used to exclude select IP address and IP domains that shall be excluded and prohibited from accessing VCL-Mega NTP Server. This feature is especially useful in excluding the foreign IP domains so that DoS attacks cannot be generated fromsources that are beyond the institutional perimeter, or outside the national boundaries.
  • MD5 Authentication. Useful in providing additional protection to NTP / SNTP clients or slaves and protect against malicious NT Pserver spoofing.

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: 1 sec.
    • Acquisition time - Warm Start: 28 sec.
    • Acquisition time - Cold Start: 28 sec.
  • GPS / GNSS Signal:
    • Tracking and Navigation: -162 dBm
    • Reacquisition -160 dBm
    • Cold Start -148 dBm
  • Antenna Connector: SMA
  • Accuracy Of Time-Pulse Signal referenced to GPS: ± 30ns (raw)
  • Accuracy Of Time-Pulse Signal referenced to GNSS: ± 20ns (raw)
  • Accuracy Of Time-Pulse Signal referenced to GPS/GNSS: ± 15ns (compensated)
    (Note: with all satellites in view at -130db).

Antenna Specifications:

  • Antenna Type: Active, Rooftop Mounting
  • Polarization: Right hand circular
  • Frequency Band: 1575.42 MHz + 10 MHz
  • Amplifier Gain: 40dB
  • VSWR: <2.0 Max, 1.0 Typical
  • Operating temperature: -40C to +85C
  • Out of Band Rejection: ≥ -60dB @ +50MHz off center (1575.42 MHz) frequency
  • Lightening Protection: According to EN61000-4-5 Level 3
  • LMR400 (or equivalent) Cable Length - 30, 50, 60 and 90 meters.

Network Time Protocol

  • NTP v2, (RFC 1119), NTP v3 (RFC 1305), NTP v4, (RFC 5905), SNTP v3 (RFC 1769), SNTP v4 (RFP 2030), MD5 Authentication
  • Up to 12,000 NTP requests per second / per 1G port
  • Up to 120,000 NTP requests per second / per 10G port
  • Internet Protocol: IPv4/IPv6
  • NTP version 4.2.8p7
  • Time Protocol: TIME (RFC 868)
  • Daytime Protocol: DAYTIME (RFC 867)
  • Supports Unicast, Multicast and Broadcast
  • NTP Peering

MTBF:

  • Per MIL-HDBK-217F: ≥ 37 years @ 24C
  • Per Telcordia SSR 332, Issue 1: ≥ 42 years @ 24C

Monitoring and Management:

  • LED Indications:
    • Antenna Detect
    • GPS Lock
    • PLL Lock
  • The system configuration can be managed by GUI. A text based and menu driven setup utility is also available via Telnet or SSH. An optional NMS allows multiple systems installed on a network to be monitored and configured from a single or multiple locations.