VCL-2112, PTP Slave Clock

PTP IEEE-1588v2 Slave Clock for ToD (Time of Day) and Frequency Synchronization

Product Overview

VCL-2112, PTP Slave Clock is a high precision, high reliability time and frequency synchronization solution which can be used to synchronize with an IEEE-1588v2 PTP Grandmaster to provide reference frequency and time-of-day synchronization across all nodes of a PTP network. Multiple 1PPS / 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.

Data SheetIEEE-1588v2

VCL-2750, IEEE-1588v2 PTP Slave (DIN Rail Version)

The VCL-2112, PTP Slave Clock is specifically designed for the synchronization of 2G, 3G and LTE mobile telecommunications networks as well as backhaul wire-line TDM Networks. It may be also used by Railways, Airports (including air-traffic control), power generation and distribution companies and other utility companies who need to distribute highly precise time-of-day and frequencies locked to a PTP Grandmaster (GPS) Reference across all nodes of their networks.

The VCL-2112, PTP Slave Clock is equipped highly accurate, low-noise OCXO which provides a high stability holdover that is typical of an SSU in the event of a failure of the transmission link.

Application Diagram

VCL-2112, PTP Slave Clock

Model Description
VCL-PTP-2112, PTP Slave Clock VCL-2112, PTP (IEEE-1588v2) Slave Clock - synchronizes to PTP Grandmaster to provide 1PPS, NMEA, 10MHz, 2.048MHz, 1.544Mbits / 2.048Mbits Frequency Outputs with high stability OCXO holdover.

Features and Highlights

  • Reliable, Cost-Efficient Reference
  • BCMA (Best Master Clock Algorithm) - allows the unit to be installed in a redundant PTP Grandmaster network
  • OCXO Holdover
  • 10 MHz output
  • 1 PPS / IRIG-B outputs
  • Nanosecond accuracy
  • Standard RJ45 and BNC connectors for all inputs and outputs
  • ToD compliant to NMEA 0183 (DB9 Serial Port).

Additional Features:

  • 1 x PTP (10/100BaseT Ethernet Slave Port)
  • Password Protection
  • Redundant AC and DC power supply options
  • 1 x OAM (10/100BaseT Ethernet Port)
  • VLAN and Packet priority
  • Supports QoS, 802.1p based packet priority
  • Supports 802.1Q based VLANs
  • Power Contact and Lightening Protection as per Telcordia GR-1089-CORE.

Technical Specifications

Management and Monitoring Ports:

  • RS-232C
  • USB
  • 10/100BaseT Ethernet
  • 1 x External Alarm Relay Contact.

Standard Frequency and ToD* Outputs:

Output Type Connector
2 x 1 PPS BNC
2 x IRIG-B, synchronized to PTP Grandmaster (GPS) reference** BNC
1 x TOD (Time-Of-Day) output compliant to NMEA0183 DB9, RS-232C
4 x 1.544 Mbits (T1) / 2.048 Mbits (E1) compliant with ITU-T G.703 RJ45
1 x 2.048 MHz, 75 Ohms, phase-locked to PTP Grandmaster (GPS) Reference BNC
1 x 1/5/10 MHz, 50 Ohms, phase-locked to PTP Grandmaster (GPS) Reference BNC

**Note: User selectable between IRIG-B and 1PPS Outputs

System Access, Control and Management Options:

  • Telnet
  • CLI Control Interface (HyperTerminal or VT100)
  • SNMP V2 Traps (MIB File provided).

Security and Protection:

  • Password Protection
  • Separate VLAN on monitoring and access.

Configuration and Monitoring Software:

  • Telnet, CLI
  • GUI (Graphical User Interface) - Runs on any PC operating on Windows XP, Windows 7, Windows 8 and Windows 10 OS.

Power Supply Options:

  • 1+1 AC power (100 to 240V AC, 50/60 Hz)
  • 1+1 DC 24V power
  • 1+1 DC -48V power
  • 1+1 DC 110/125V DC power


  • Operational: -20°C to +60°C (Typical: +25°C)
  • Cold Start: -20°C to +60°C
  • Storage: -40°C to +75°C
  • Humidity: 95% non-condensing
  • Cooling: Convention Cooled, No cooling fans are required.

Data Sheet

Data Sheet