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

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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)

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.