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Redundant GPS, Primary Reference Clock with IEEE-1588v2 PTP and NTP

VCL-2145 is a high-performance GPS Primary reference clock and IEEE-1588v2 PTP that provides ITU-T G.811 primary synchronization freferences which are locked to a user selected satellite source.


The VCL-2145 (VCL-2145-D) Satellite Receiver also has an integrated, high bandwidth NTP Server engine that is capable of handling up to 5000 NTP requests per second. Multiple IRIG-B Outputs are also provided to synchronize local clock (time-of-day) display units as well as RTUs to a central timing source with nanosecond accuracy.

The VCL-2145 (VCL-2145-D), Primary Reference (PRC) Clock is specifically designed for frequency synchronization of 2G, 3G, HetNet and LTE mobile telecommunications networks as well as backhaul wire-line SDH / SONET and Synchronous Ethernet networks. It may be also used by Railways, Airports (and air-traffic control), Power generation and distribution companies and other Utility companies who not only require highly precise G.811 frequency synchronization locked to a GPS Reference but who also need to provide an accurate time-of-day reference in their networks.

The VCL-2145-D incorporates up to dual (1+1 redundant) GPS receiver engines and dual (1+1 redundant) power supply options for added reliability which are always locked to a user selected satellite (GPS) reference to provide multiple G.811 / Stratum 1 quality frequency and time-of-day (PTP, NTP and IRIG-B) outputs. The VCL-2145 is also equipped highly accurate, low-noise OCXO / Rubidium oscillator which provides a high stability holdover clock that is typical of a Network SSU in the event of the GPS signal, or its antenna failure.

VCL-2145 is a high-performance, high-reliability GPS Primary reference clock and IEEE-1588v2 PTP grandmaster that provides ITU-T G.811 primary synchronization freferences which are locked to a user selected satellite source.


Features and Highlights

  • Reliable, Cost-Efficient Reference GPS Receiver
  • 50 Channel GPS, L1 frequency, C/A Code Receiver
  • Available with 1+0 (VCL-2145, without GPS redundancy) and 1+1 (VCL-2145-D, with GPS redundancy) options
  • Tracks up to 12 GPS Satellites
  • Concurrent tracking of up to a total of 34 Satellites
  • ITU-T G.811 Primary Reference (PRC) Clock
  • GPS locked G.703 compliant 1.544Mbits, 2.048MBits, 2.048 MHz 1 PPS and 1 PPM outputs
  • SSM Message format Compliant with ITU-T G.704. Optional GR-378-CORE for SONET Networks
  • ITU-T G.811 / Stratum 1 compliant (PR) Primary Reference when locked to GPS
  • Primary reference and holdover functionality:
  • ITU-T G.812 compliant holdover
  • Leap Second Support
  • MD5 authentication for NTP clients
  • 1/5/10 MHz output
  • 1 PPS and 1 PPM
  • IRIG-B outputs
  • Standard RJ45 and BNC connectors for all inputs and outputs
  • ToD compliant to NMEA 0183 (DB9 Serial Port)
  • LCD display with back light.

Additional Features

  • IEEE - 1588v2 PTP Grandmaster
  • High bandwidth NTP Server capable of supporting up to 5000 NTP requests per second
  • IPv4 and IPv6 compatible NTP Server
  • SSH, Telnet, Radius, SNMP V2 MIB, Password Protection
  • Redundant AC and DC power supply options
  • 4, 10/100/1000BaseT Network Interface Ethernet Ports
  • Power Contact and Lightening Protection as per Telcordia GR-1089-CORE.

Typical Synchronization Applications

  • Synchronizing Cellular networks like UMTS, GPRS, 3G and LTE
  • Power generation and distribution companies and other utility companies
  • Wireless and Wireline Telecom synchronization
  • Distributing Time (ToD) and Frequency reference for power utilities across all nodes of the network
  • Synchronization of Defense Networks
  • Synchronizing airports and aviation communications
  • Synchronizing railway signalling networks and railway communications
  • Synchronizing traffic management
  • Broadcasting Network and Broadcast equipment synchronization.
Product Description
VCL-2145 (VCL-2145-D), GPS Primary Reference (PRC) Clock
VCL-2145, GPS Primary Reference (PRC) G.811 Clock Provides 1PPS, 1PPM, NMEA, 1/5/10MHz, 2.048MHz, 2.048Mbits with SSM, 1.544Mbits Frequency Outputs with High Stability OCXO and Rubidium (G.812) Holdover Clock options.
VCL-2145, GPS Primary Reference (PRC) G.811 Clock with NTP Server May be used in multi-service applications as a G.811, Primary Reference (PRC) Clock and NTP Server 1/5/10MHz, 2.048MHz, 2.048Mbits with SSM, 1.544Mbits GNSS referenced outputs. OCXO and Rubidium (G.812) Holdover Clock options are available.
Optional:GNSS: GPS, GLONASS, GPS+GLONASS, GPS+SABS (ISRO-GAGAN).

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