Glossary. American Time AllSync IQ Wired Master Clock, AllSync IQ ASQMSTR-00X2E, AllSync IQ ASQMSTR-00X6E, AllSync IQ ASQMSTR-00X8E

Glossary

AllSync IQ Installation Manual

Analog Clock - A clock that represents time by position of hands on a dial.

CAT 5 Cable Category 5 Cable. A twisted pair cable type designed for high signal integrity and commonly used in computer networks such as Ethernet. CAT 5 cable is used for Ethernet wiring on the AllSync IQ Master.

Circuit One of the 6 relay outputs on the AllSync IQ Master.

Client A computer or other networked device, or a software application, that connects to and request information from a server.

Daytime Protocol (RFC-867) - A standard, Internet-based timekeeping specification that calls for a timestamp to be sent from a timeserver as an ASCII character string containing the current date and time. This message is sent from the timeserver as a response to any input on port 13. The timeserver closes the connection as soon as the timestamp is sent. The AllSync IQ Master is capable of sending and receiving timestamps via UDP port 13 using this protocol.

Digital Clock A clock that displays time with numerical display (12:00).

Ethernet A very popular technology for networking computers and other devices. This communication method is used for transmitting and receiving precise timing signals by the AllSync IQ Master.

Event Programmed into the AllSync IQ Master with time and date information, as well as a duration or a start/stop command. For example, Event 0001 may be programmed to execute every Monday, Wednesday and Friday at 10:00 am for 3 seconds.

FCC - Federal Communication Commission. A U.S. government agency in charge of regulating non-federal government use of radio spectrum.

Firewall A network configuration, usually both hardware and software, that forms a fortress between networked computers within an organization and those outside the organization. It is commonly used to protect information such as e-mail and data files within a physical building or organization site.

Gateway - A network device or network point that acts as an entrance to another network, such as the server through which computers on a local area network (LAN) access the Internet.

Gateway IP Address - The address value for the Gateway device on the network (see Gateway).

Internet - A worldwide system of computer networks in which any one computer can get information from/or talk to any other connected computer using the TCP/IP protocols.

Leap Second A second of time as measured by an atomic clock, added to or omitted from official timekeeping systems annually to compensate for changes in the rotation of the earth.

Master Clock - In a timekeeping or clock system, a device that acts as the source of time. The Master Clock, or System Controller, transmits the time to any number of secondary (slave) clocks.

Network A group of interconnected computers or other electronic devices, capable of transferring data signals with each other.

NIST National Institute of Standards and Technology. The Time and Frequency Division, part of NIST's Physics Laboratory, maintains the standard for frequency and time interval for the United States and provides official time to the United States.

Patch Cable - A cable with plugs or terminals on each end of the conductor or conductors used to connect circuits of equipment together.

Patch cables are used to connect an individual computer or other device to a network. The AllSync IQ Master can be connected to an RJ-45 jack with an Ethernet Patch Cable.

RJ-45 - Registered Jack-45. An 8-pin (or 8-wire) modular connector used to attach data transmission devices to standard telephone wiring.

Commonly used in Ethernet data connections and installed in the AllSync IQ Master for physical connection of the Ethernet port.

Schedule A group of events. For example, a school might program Schedule 01 with 4 events for their morning Elementary recess schedule.

The AllSync IQ Master allows for 99 unique schedules, with any number of events in each (up to a maximum total of 9,999 events).

Secondary Clock Also known as a slave clock. This is a clock that synchronizes its timekeeping to that of a system master clock.

Server - A host computer or host device on a network, which shares resources and "serves" data to client computers or other servers.

SNTP Simple Network Time Protocol. A less complex form of Network Time Protocol (NTP) commonly used for synchronization of computers and other devices. In SNTP, the client makes a single timing request to a single server (similar to the Daytime Protocol) and then uses this information to set its clock. This differs from NTP, which uses multiple servers and averages their results. The AllSync IQ Master supports

SNTP as both a client and a server.

Static IP Address - An Internet Protocol (network) address permanently assigned to an individual machine, account or user.

Subnet Mask A number that helps to define the relationship between the host (computers, routers, switches, etc.) and the rest of the network.

56

© American Time

AllSync IQ Installation Manual

Glossary

Synchronization The process of bringing two clocks or time sources into phase so their difference is zero. In the case of a timekeeping system, time synchronization takes place between the master clock and all secondary clocks.

Timeserver - A system or device that acquires the correct time from a local reference clock and/or remote time servers and will answer time requests from other systems. See "Server" above.

Timeserver IP Address The value of an address for a timekeeping server on the local computer network or Public Internet.

Timestamp A time mark or notation that indicates the date and time.

UDP - User Datagram Protocol. An Ethernet protocol commonly used for time sensitive applications and which does not guarantee reliability, but does not delay packets (as in TCP-IP).

UL Underwriters Laboratory. U.S. non-profit safety testing and certification organization.

UTC Universal Coordinated Time. A time-scale that forms the basis of a coordinated distribution of standard frequencies and time signals throughout the world. It is often referred to as Greenwich Mean Time (GMT) or Zulu Time (military and aviation).

© American Time

American Time

140 3rd Street South, PO Box 707

Dassel, MN 55325-0707

Phone: 800-328-8996

Fax: 800-789-1882 american-time.com

57