GPS / GNSS Time Servers
GigE NTP Server

VCL Products > PTP Grandmaster > VCL-2156, GigE NTP Server
NTP Server, PTP Grandmaster

VCL-2156, GigE NTP Server

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The VCL-2156, GigE NTP Server is designed to provide PTP, NTP Clock that is locked to a GPS / GNSS reference to provide time synchronization to private networks such as Railways and Metro networks, Airports and Air-Traffic Control facilities, Power Utilities, Oil and Gas Utilities, 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. VCL-2156 locks to a GPS / GNSS reference to provide an NTP time reference on up to 4 x 10/100/1000BaseT Ethernet Ports which can be segregated to serve separate classes of assets in the network.

Features and Highlights

  • IEEE 1588 v2 Precision Time Protocol Grandmaster
  • PTP Profiles supported: Telecom profile, Power profile
  • Support up to 128 PTP Clients
  • Gigabit Ethernet Interfaces for NTP and PTP ports
  • High bandwidth NTP performance
  • Upto 7,500 NTP requests per second
    • 40,000 NTP Slaves supported
    • 250,000 SNTP Slaves supported
  • Multiple NTP Ports - 4 Independent 10/100/1000 Mbit/s, RJ-45 Ethernet interfaces
  • ITU-T G.811 / Stratum 1 compliant (PR) Primary Reference when locked to GPS
  • ITU-T G.812 compliant holdover
  • Synchronization of NTP and SNTP clients
  • Leap Second Correction Support
  • MD5 authentication for NTP clients
  • Meets and comply with Power Contact and Lightening Protection as per EN61000-4-5 Level 3 specification
  • Alert notifications via SNMP Traps, SNMPv2, SNMPv3
  • Concurrent IPv6 and IPv4 operation
  • Networking protocols: IPv4, IPv6, SSH, TELNET, FTP, SYSLOG, SCP, TFTP, SCP, SFTP
  • Supports Anti Jamming
  • Supports Anti-Spoofing
  • Secure network management: enable or disable options
  • Double Oven Quartz Oscillator (OCXO) hold-over
  • DC, or AC, or 1+1 Redundant AC+DC Power Supply options.

Monitoring and Management

The configuration can be managed by Graphical User Management Interface. A text based and menu driven setup utility is also available via Telnet or SSH. An optional Graphical User Network Management Interface (NMS) allows multiple systems installed on a networks to be monitored and configured from a single or multiple management locations.

Performance

VCL-2156 has 4x10/100/1000BaseT Industrial Ethernet Ports that meet and comply with “Power Contact and Lightening Protection” as per EN61000-4-5 Level 3 specifications making it suitable for the equipment to be installed in harsh industrial environments which include Electric Sub-Stations, Railway and Metro Networks.

VCL-2156 is powered by a high performance microprocessor and a highly precise GPS based time receiver that provides a better than 30 nanosecond accuracy to assure high bandwidth NTP Performance of better than 7,500 NTP requests per second / 128 packets per seconds (40,000 NTP Slaves supported ).

Synchronization Inputs:

  • 1+1 x GPS / GNSS (TNC)

PTP Time Output:

  • 1 x Gigabit IEEE-1588 v2 PTP Grandmaster

NTP Outputs:

  • 4 x 10/100/1000 Mbps NTP Interfaces
  • 1 x 10/100Mbps user configurable NTP / OAM interface.

Applications Diagram:


Application Diagram

GPS/GNSS Receiver Specifications:

  • 50 Channel GPS Receiver
  • 72 Channel GNSS Receiver
  • GPS L1 frequency, C/A Code Receiver
  • Tracks up to 12 satellites in GPS only mode (GPS only version)
  • Tracks up to 24 satellites in GNSS mode (GNSS version)
  • Synchronizing Time:
    • Acquisition time - Hot Start: Less than 1 sec.
    • Acquisition time - Warm Start: 28 sec.
    • Acquisition time - Cold Start: 28 sec.
  • GPS/GNSS Signal
    • Tracking and Navigation: -162 dBm
    • Reacquisition -160 dBm
    • Cold Start -148 dBm
  • Antenna Connector: TNC
  • Accuracy Of Time-Pulse Signal referenced to GPS: ± 30ns (raw)
  • Accuracy Of Time-Pulse Signal referenced to GNSS: ± 20ns (raw)
  • Accuracy Of Time-Pulse Signal referenced to GPS/GNSS: ± 15ns (compensated)
    (Note: with all satellites in view at -130db).

Security and Protection:

  • Password Protection with password strength monitor
  • SSH.

Standards & Compliance

  • IEC - EMC – Certified to EN 55022: 2005 / CISPR 32A / EN55022, EN 55024:2005, IEC 61000-4-2, IEC 60255 / 61000-4-6, 8, 9, IEC 60255-22-6, IEC 60255-5:2000, IEC 61000-4-8, IEC 61000-4-9, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-18, IEC 60068-2-6, IEC 60068-2-1Ad, IEC 60068-2-14Ad, IEC 60068-2-2Bd, IEC 60068-2-30, IEC 61850-3
  • CE – 2001/95/EC, 2006/95/EC, EN60950-1, EN61000-6-2, EN61000-6-4
  • FCC – FCC Part 15 B Class A: Conducted Emission test on Power Line
  • FCC Part 15 B Class A: Radiated Emission >1 GHz FCC, 6 GHz, on Power Line

Network Time Protocol:

  • NTP v2, (RFC 1119), NTP v3 (RFC 1305), NTP v4, (RFC 5905), SNTP v3 (RFC 1769), SNTP v4 (RFP 2030), MD5 Authentication
  • Upto 7,500 NTP requests per second
  • 40,000 NTP Slaves supported
  • 250,000 SNTP Slaves supported
  • Internet Protocol: IPV4 - DHCP (RFC 2131), IPV6 - DHCPv6 (RFC 3315)
  • NTP Version 4.2.8p7
  • Time Protocol: TIME (RFC 868)
  • Daytime Protocol: DAYTIME (RFC 867)

Power Supply Options:

  • Dual Redundant
  • 1+1 AC power (100 to 240V AC, 50/60 Hz, IEC C14 Inlet Connector)
  • 1+1 DC 24V
  • 1+1 DC -48V
  • 1+1 DC 110~220V
  • AC or DC
  • Reverse Polarity Protection.

Antenna Specifications:

  • Antenna Type: Active, Wall Mounting
  • Antenna Connector: TNC
  • Polarization: Right hand circular
  • Frequency Band: 1575.42 MHz ± 10 MHz
  • Amplifier Gain: 40dB ± 4dB
  • VSWR: <2.0 Max, 1.0 Typical
  • Operating temperature: -40C to +85C
  • Out of Band Rejection: > -60dB @ ± 50MHz off center (1575.42 MHz) frequency
  • Lightening Protection: According to EN61000-4-5 Level 3.
  • LMR400 (or equivalent) Cable Length - 30, 50, 60, 90 and 100 meters

MTBF:

  • Per MIL-HDBK-217F: ≥ 37 years @ 24C
  • Per Telcordia SSR 332, Issue 1: ≥ 42 years @ 24C