ADTRAN 1200130L2 Instrukcja Użytkownika Strona 139

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61200.130L1-1 FSU User Manual 125
Glossary
synchronous
Communications in which the timing is achieved by sharing a single clock. Each
end of the transmission synchronizes itself with the use of clocks and
information sent along with the transmitted data.
synchronous data link control (SDLC)
A link-level communications protocol used in an international business machines
(IBM) systems Network Architecture (SNA) network that manages synchronous,
code-transparent, serial information transfer over a link connection. SDLC is a
subset of the HDLC protocol developed by ISO.
T1
Transmission rate of 1.544 Mbps on T1 communication lines. A T1 facility
carriers a 1.544 Mbps digital signal. Also referred to as digital signal level 1 (DS-
1). See also E1 and channel.
trunk line
A communications line connecting two frame relay switches to each other.
VT 100
A non-intelligent terminal or terminal emulation mode used for asynchronous
communications. Used to configure the FSU.
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