The VCL-2156, NTP Server, PTP Grandmaster (IEEE-1588v2), ITU-T G.811 Primary Reference Clock 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.
VCL-2156 locks to a GPS / GNSS reference to provide an NTP time reference on up to 4+1, 10/100BaseT Ethernet Ports which can be segregated to serve separate classes of assets in the network.
The VCL-2156 is equipped with a highly accurate, low-noise OCXO to provide a high stability, ITU-T G.812, Type II, III compliant holdover clock with better than 12µs accuracy over a 24 hour (5 milliseconds per year) period in the event of unavailability of the GPS / GNSS signal, or GPS / GNSS antenna failure, or a temporary loss of reception in a totally isolated network without any external reference.
VCL-2156 establishes a highly accurate phase-synchronized frequency and time base by synchronizing to the GPS / GNSS satellites’ atomic clocks to distribute synchronized time over packet based networks including Ethernet, Carrier Ethernet, IP and IP/MPLS Networks.
The VCL-2156 provides a wide range of GPS / GNSS referenced frequency and time sources that include 2.048MHz, 1/5/10MHz, 1PPS frequency as well as an NMEA and NTPv4 time reference. Features such as maintaining a distinctly separate IP address for system management and control, password based access, SSH as well as Md5 authentication ensures operational reliability and security. Additional features include remote login and remote firmware upgrade (file transfer) capabilities.
VCL-2156 includes complete SNMP monitoring as well as support for enterprise directory services for user authentication, internal and external logging and monitoring of alarm and error messages through Syslog and e-mail alert ensures a high level of system manageability. Other features include DHCP for installation convenience and support concurrent IPv4/IPv6 support for future network up gradation.
Performance
VCL-2156 is designed to be deployed in concurrent IPv4 networks to provide NTP time and frequency synchronization.
The 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 4 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 / GNSS based time receiver that provides a better than 30 nanosecond accuracy to assure high bandwidth NTP Performance of better than 5000 NTP requests per second / 128 packets per seconds.
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
Application # 1:
Application # 2: Assigning Multiple NTP Servers for high security applications and network segregation
GPS/GNSS Receiver Specifications:
PTP, Frequency and Time Outputs:
PTP IEEE 1588-2008 V2 Grandmaster:
PTP Profiles:
Security and Protection:
Power Supply Options:
MTBF: