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| G |
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| G.703 |
ITU-T recommendation |
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Defines the electrical characteristics for interfaces, e.g. G.703-2, G.703-6, G.703-10. The suffix -n denotes the recommendation's paragraph number. |
| G.704 |
ITU-T recommendation |
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Defines the frame structure/functional characteristics of interfaces associated with network nodes, synchronous digital multiplex equipment, PCM multiplexing equipment (i.e. 1544, 2048, 8448 kbit/s, etc.). |
| G.811 |
ITU-T recommendation |
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Defines requirements of Primary Reference Clock systems (PRC). |
| G.812 |
ITU-T recommendation |
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Defines requirements of slave clocks (types I,II, III, IV, V and VI). |
| G.813 |
ITU-T recommendation |
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Defines requirements of slave clocks suitable for operation of SDH equipment. |
| G.823 |
ITU-T recommendation |
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Defines control of jitter and wander in digital networks based on the 2048 kbit/s hierarchy. |
| G.824 |
ITU-T recommendation |
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Defines control of jitter and wander in digital networks based on the 1544 kbit/s hierarchy. |
| G.825 |
ITU-T recommendation |
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Defines control of jitter and wander in digital networks based on the synchronous digital hierarchy (SDH). |
| GPS |
Global Positioning System |
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Satellite based navigation and timing system. |
| GPS-I |
GPS Receiver Interface |
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GPS interface integrated into front end of OSA 5548 or 5548B SASE. |
| GPS-I2 |
GPS Receiver Interface |
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The new generation of GPS-I. (See above) |
| GPS-M |
GPS Receiver Module |
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GPS module used in OSA SSU 5546 and GRU 5581. |
| GPS-x1-y |
GPS Input & Holdover module |
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GPS module used in the OSA 5581C GPS.
x indicates the kind of auxiliary input (E=E1, T=T1)
y indicates the holdover quality (A=Rubidium, B=OCXO) |
| GUI |
Graphical User Interface |
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| H |
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| Holdover Mode |
Clock operating mode |
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A clock operates in holdover mode when it has lost its controlling sync input (external reference) and is using stored data to control its output. Holdover terminates when the clock is once again controlled by an external reference. |
| HOU |
Hold Over Unit |
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This is a module with internal oscillator which is normally locked to the selected input reference by means of a Digital PLL Filter and provide highly stable outputs in holdover mode. |
| HyperTerminal |
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Terminal application delivered with any Windows 95,98 or NT 4.0 operating system. You can use HyperTerminal with a modem to connect two computers so You can send and receive files or connect to computer bulletin boards and other information programs. For example, You can use HyperTerminal to connect to an online service and to download files from a bulletin board on the online service. You can also use HyperTerminal to connect a computer directly to another computer. |
| I |
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| I/O |
Input/Output Interface |
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| IEEE |
Institute of Electrical and Electronic Engineers |
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| IIU |
Input Interface Unit |
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A family of plug-in modules to interface Oscilloquartz'equipment with several types of input signals (e.g. G.703-2, G.703-6, G.703-10). |
| ILS |
Input Line Selector |
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The ILS is a plug-in module normally used in a protected arrangement that provides selection of the input synchronisation feeds using one of several operating modes: Automatic, Manual, Forced or Performance modes. |
| INC |
INput Card |
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| ISDN |
Integrated Services Digital Network |
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A set of communications standards allowing a single wire or optical fiber to carry voice, digital network services and video. ISDN is intended to eventually replace the plain old telephone system. |
| ISO |
International Standards Organization |
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| ITU-T |
International Telecommunications Union |
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New name for CCITT. International organisation that defines the characteristics and guidelines for telecommunications networks. |
Oscilloquartz