VCL-2145-D, GPS / GNSS, Primary Reference Clock, PTP Grandmaster and NTP Server

Product Overview

VCL-2145-D is a high-performance, high-reliability GPS / GNSS Primary Reference Clock and IEEE-1588v2 PTP Grandmaster that provides ITU-T G.811 Primary Synchronization Frequency References which are locked to a user selected Satellite source. The VCL-2145-D Satellite Receiver also has an integrated, high bandwidth NTP Time Server engine.

The VCL-2145-D provides multiple Input options including up to Dual GPS / GNSS Receivers, 2.048 MHz, 75 Ohms (BNC), 2.048 Mbit/s (E1) (BNC), 10 MHz, 50 Ohms (BNC) and multiple Output options including PTP 1588v2 Grandmaster, 2.048 Mbit/s (E1), or 1.544 Mbit/s (T1), 8 x 2.048 MHz, 1 MHz / 5 MHz /10 MHz, 50 Ohms, IRIG-B, 1PPS, TOD (Time-Of-Day) output compliant to NMEA0183 (DB9, RS-232C), IPv4 and IPv6 NTP Server. Multiple IRIG-B Outputs are provided to synchronize local clock (time-of-day) display units as well as RTUs to a central timing source with nano-second accuracy. OCXO and Rubidium Holdover clock options are available.

Available with:

  • 1+1 (VCL-2145-D, with GPS / GNSS redundancy)
  • 1+0 (VCL-2145, without GPS / GNSS redundancy)

Data Sheet

Comparison ChartE1 Voice and Data Primary Multiplexer

The VCL-2145-D, Primary Reference (PRC) Clock is specifically designed for frequency synchronization of 2G, 3G, 4G, 5G, 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 / GNSS 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 / GNSS receiver engines and dual (1+1 redundant) power supply options for added reliability which are always locked to a user selected satellite (GPS / GNSS) reference to provide multiple G.811 / Stratum 1 quality frequency and time-of-day (PTP, NTP and IRIG-B) outputs. The VCL-2145-D 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 / GNSS signal, or its antenna failure.

Available Version

Product Description
VCL-2145-D, GPS / GNSS Primary Reference (PRC) Clock, PTP 1588v2 Grandmaster and NTP Time Server:
VCL-2145-D Inputs Dual GPS / GNSS Receivers, 2.048 MHz, 75 Ohms (BNC), 2.048 Mbit/s (E1) (BNC), 10 MHz, 50 Ohms (BNC)
VCL-2145-D Outputs Including PTP 1588v2 Grandmaster, 2.048 Mbit/s (E1), or 1.544 Mbit/s (T1), 8 x 2.048 MHz, 1 MHz / 5 MHz /10 MHz, 50 Ohms, IRIG-B, 1PPS, TOD (Time-Of-Day) output compliant to NMEA0183 (DB9, RS-232C), IPv4 and IPv6 NTP Server.

Holdover Clock options include OCXO and Rubidium (G.812)
Optional:GNSS: GPS, GLONASS, GPS+GLONASS, GPS+SABS (ISRO-GAGAN).

Features and Highlights

  • Reliable, Cost-Efficient Reference GPS / GNSS Receiver
  • 50 Channel GPS, L1 frequency, C/A Code Receiver
  • 72 Channel GPS, L1 frequency, C/A Code Receiver
  • Available with 1+0 (VCL-2145, without GPS / GNSS redundancy) and 1+1 (VCL-2145-D, with GPS / GNSS redundancy) options
  • 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 / GNSS
  • Primary reference and holdover functionality:
    • Holdover Clock options include OCXO and Rubidium (G.812)
  • 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, 4G, 5G 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 Defence Networks
  • Synchronizing airports and aviation communications
  • Synchronizing railway signalling networks and railway communications
  • Synchronizing traffic management
  • Broadcasting Network and Broadcast equipment synchronization.

Applications

PRIMARY REFERENCE CLOCK