NTP Time Server

GPS / GNSS
NTP Time Server

VCL Products > GPS / GNSS Time Servers

GPS / GNSS NTP Time Servers

VCL offers a very wide range of NTP Time Servers that are designed to provide NTP Time and ITU-T G.811 Primary Reference Clock to provide accurate time synchronization to private networks and critical infrastructure such as Power Utilities, Oil and Gas Utilities, Railways and Metro networks, Airports and Air-Traffic Control facilities, Corporate networks, Defence applications, ISPs and Cable TV networks as well as to Campus networks that are required to maintain a complete isolation from public networks for security reasons. This solution is also being used by 3G, 4G and 5G service providers which provide a ToD (Time-of-Day) reference to their customers over their wireless networks.

VCL NTP Time Servers provides its integrated GPS Receiver which directly locks to a GPS / GNSS satellite system to provide accurate time synchronization to private networks and critical infrastructure. Taking time inputs from public NTP sources such as Microsoft, Cisco or Google for time synchronization, increasingly exposes the assets of any private network or organization making them more vulnerable to cyber-attacks and external cyber-threats. Private networks and critical infrastructure must endeavour to maintain high degree of isolation from public networks by installing their own GPS / GNSS based NTP Servers so that all its IT assets (such as computers, servers and data storage equipment) within that organization can be synchronized to an accurate, Stratum 1, time-source without any compromise of network security.

Summary Flyer (PDF)



VCL-3048: NTP Time Server, IRIG-B

Inputs: GPS/GNSS
Outputs: NTP, 1PPS, IRIG-B (Unmodulated BNC, RS-232,
RS-485 / RS-422)
Power Supply: 12V DC, 24V DC, 48V DC
Service Capacity: Suitable for servicing up to 3000 NTP / SNTP requests
per second.
  Read More... Data Sheet (PDF)
NTP IRIG-B


VCL-2156: NTP, PRC (ITU-T G.811), IRIG-B

Inputs: GPS/GNSS, NTP
Outputs: NTP, 2.048MHz, 10MHz, 1PPM/1PPH, 1PPS, ToD NMEA 0183, IRIG-B (Unmodulated and Modulated)
Power Supply: 24V DC, 48V DC, 110-220V DC, 110-240V AC, 1+1 Redundant PSU
Service Capacity: Suitable for servicing up to 7500 NTP / SNTP requests per second.
  Read More... Data Sheet (PDF)


VCL-2156-EXT: NTP Client / NTP Slave (Extension Unit)

Inputs: NTP / SNTP
Outputs: IRIG-B (Modulated / Unmodulated - BNC, Unmodulated - RS422, RJ45), ToD (Time-Of-Day, RJ45) NMEA 0183, 1 PPS (BNC, ST - Optical)
Power Supply: 24V DC, 48V DC, 110-220V DC, 110-240V AC, 50/60 Hz
  Read More... Data Sheet (PDF)


VCL-2145-D: GPS/GNSS (1+1), PRC (G.811), PTP, NTP, IRIG-B

Inputs: GPS/GNSS (1+1), 10MHz, 2.048MHz, 2.048Mbit/s (E1)
Outputs: NTP, PTP, 1.544Mbit/s (T1) / 2.048Mbit/s (E1), 2.048MHz, 10MHz, 1PPS, 1PPM, IRIG-B, ToD NMEA-0183
Power Supply: 24V DC, 48V DC, 110-220V DC, 110-240V AC, 1+1 Redundant PSU
Service Capacity: Suitable for servicing up to 10,000 NTP / SNTP requests per second.
  Read More... Data Sheet (PDF)


VCL-2145-DE: GPS/GNSS (1+1), PRC (G.811), PTP, NTP, IRIG-B

Inputs: GPS/GNSS (1+1), 10MHz, 2.048MHz, 2.048Mbit/s (E1)
Outputs: NTP, PTP, 1.544Mbit/s (T1) / 2.048Mbit/s (E1), 2.048MHz, 10MHz, 1PPS, 1PPM, IRIG-B, ToD NMEA-0183
Power Supply: 24V DC, 48V DC, 110-220V DC, 110-240V AC, 1+1 Redundant PSU
Service Capacity: Suitable for servicing up to 8900 NTP / SNTP requests per second.
  Read More... Data Sheet (PDF)


VCL-Mega: NTP Time Server

Inputs: GPS/GNSS, 1PPS
Outputs: 16 x 1G/10G NTP Outputs
Power Supply: 110~240VAC, 1+1 Redundant Hot-swappable PSU
Service Capacity: Suitable for servicing up to 1 Million NTP / SNTP requests per second.
  Read More... Data Sheet (PDF)


VCL-2103: High Performance NTP Sub-Master Clock

Inputs: 1 x 10/100/1000BaseT Ethernet NTP Input Port with automatic synchronization with multiple (redundant) NTP Server(s)
Outputs: 4 x 10/100BaseT Ethernet NTP / SNTP Output Ports for slave device(s)
Power Supply: 24V DC, 48V DC, 110V DC / 220V DC, 90V AC-240V AC, 50/60 Hz
  Read More... Data Sheet (PDF)




Valiant Communications is an ISO 9001:2015, ISO 10001:2018, ISO 14001:2015, ISO 27001:2013 and ISO 45001:2018 certified equipment manufacturer.