NTP Server, PTP Grandmaster (IEEE-1588v2), ITU-T G.811 Primary Reference Clock

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

VCL-2156, NTP Server, PTP Grandmaster (IEEE-1588v2)
ITU-T G.811 Primary Reference Clock

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The VCL-2156, PTP IEEE-1588v2 Grandmaster with NTP SERVER is designed to provide PTP, NTP and ITU-T G.811 Primary Reference Clock that is locked to a GPS / GNSS Reference to provide time synchronization to private networks such as Railways and Metro (ticketing and platform) networks, Airports and Air-Traffic Control facilities, Electric Sub-Stations, Power Distribution and Transmission companies, 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. It may be also used by 2G, 3G and LTE service providers which provide a time of day reference to their customers over their wireless networks.

ITU-T G.811 PRC 2G, 3G & LTE GPS/GNSS PTP IEEE-1588v2

Features and Highlights

IEEE 1588V2-2008 Precision Time Protocol Grandmaster
PTP Profiles supported: Telecom profile, Power profile
Support up to 128 PTP Clients
Gigabit Ethernet Interfaces
2.048MHz, 10MHz, 1 PPS and TOD Output
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 x Independent 10/100 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
NTP Peering
Leap Second Support
MD5 authentication for NTP clients
1 x IRIG-B Un-Modulated (BNC)
1 x IRIG-B Modulated (RJ45)
Meets and comply with Power Contact and Lightening Protection as per Telcordia GR-1089-CORE and EN61000-4-5 Level 3 specifications.
Alert notifications via SNMP Traps, SNMPv2, SNMPv3
Concurrent IPv6 and IPv4 operation
Supported networking protocols: IPv4, IPv6, SSH, TELNET, FTP, SYSLOG, TELNET, SCP, SFTP
Secure network management: enable or disable options
Double Oven Quartz Oscillators (OCXO) hold-over
DC, or AC, or 1+1 Redundant AC+DC Power Supply options.

NTP Peering

NTP peering is a method to allow multiple NTP servers to share time. Having more than one reference server configured increases reliability of the NTP server.

In peering mode, in addition to its GPS reference, the VCL-2156 can be configured to receive and monitor time from an additional Stratum 1 NTP Server available on the network. This allows the unit to fall back to its peer source in the event its primary reference becomes unavailable.

Performance

VCL-2156 has 4+1, 10/100 BaseT Industrial Ethernet Ports that meet and comply with “Power Contact and Lightening Protection” as per Telcordia GR-1089-CORE and 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 / GLONASS 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 ).

Monitoring and Management

The configuration of the system can be managed by Graphical User Management Interface. Alternatively, a text based and menu driven setup utility can be started from the shell prompt after logging into the unit 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.

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

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).

PTP, Frequency and Time Outputs:

1 x Gigabit IEEE-1588 v2 PTP Grandmaster
1 x 2.048 MHz, 75 Ohms, phase-locked to GPS (BNC). ITU-T G.811 compliant.
1 x 10 MHz, 50 Ohms, phase-locked to GPS (BNC). ITU-T G.811 compliant.
1 x 1 PPS, phase-locked to UTC (BNC)
1 x ToD (Time-Of-Day) output compliant to NMEA 0183 (DB9)
1 x IRIG-B Un-Modulated (BNC-50 Ohms)
(B000, B002, B003, B004, B005, B006, B007)
1 x IRIG-B Modulated (Rj45)
(B120, B122, B123, B124, B125, B126, B127)
1 x 1 PPM / 1 PPH

Security and Protection:

Password Protection with password strength monitor
SSH.

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)
NTP Peering

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
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 (Optional).
LMR400 (or equivalent) Cable Length - 30, 50, 60 and 90 meters.

MTBF:

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

Applications Diagram:

VCL-2156, NTP PTP Server

Application # 2: Assigning Multiple NTP Servers for high security applications and network segregation

IEEE-1588v2 Grandmaster and Boundary Function in PTP Network

Note:

Accuracy between PTP Grandmaster and PTP Slave better than 100ns.
Phase synchronized 1PPS between PTP Grandmaster and PTP Slave.

Mechanical Drawing (PDF)

Other Related Products:
VCL-2145-D: GPS/GNSS (1+1), PRC (G.811), PTP, NTP, IRIG-B VCL-2750: PTP Slave Clock (DIN Rail) VCL-2145-DE: GPS/GNSS (1+1), PRC (G.811), PTP, NTP, IRIG-B VCL-2112: PTP Slave Clock (19-Inch Rack-Mount) VCL-2739: PTP Aware Switch / PTP Transparent Clock (DIN Rail) GPS to IRIG-B PTP to IRIG-B PTP Grandmaster, PTP Slave and PTP Transparent Clocks GPS to IRIG-B, GPS to 1PPS Servers GPS/GNSS Primary Reference Clock (PRC) GPS/GNSS Time Servers Time Distribution, IRIG-B, 1PPS, RS-232 / RS-485

Valiant Communications is an ISO 9001:2015, ISO 10001:2018, ISO 14001:2015, ISO 27001:2022 and ISO 45001:2018 certified equipment manufacturer.

GPS / GNSS Time Servers NTP Server, PTP Grandmaster

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

Features and Highlights

NTP Peering

Performance

Monitoring and Management

Standards & Compliance

GPS/GNSS Receiver Specifications:

PTP, Frequency and Time Outputs:

Security and Protection:

Network Time Protocol:

Power Supply Options:

Antenna Specifications:

MTBF:

Applications Diagram:

VCL-2156, NTP PTP Server

IEEE-1588v2 Grandmaster and Boundary Function in PTP Network

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NTP Server, PTP Grandmaster