Zhone Technologies IMACS-200 manual Esf, Ess, ETS1, Fas, Fcc, Fdl, FE1, Febe

Errored Seconds. The number of seconds for which BRI port has detected a NEBE or FEBE greater than zero (0).

ESF

Extended Superframe (24-frame sequence for a T1 line; consists of two superframes)

ESS

Electronic Switching System

E&M

Earth and Magnetic, or recEive and transMit. The signaling leads on inter-switch voice connections.

E&M port

An E&M voice port for this system.

ETS1

European Telecommunications Standards Institute

F4

Four-frame multiframe structure used in T1 signals.

FAS

Frame Alignment Signal

FCC

Federal Communications Commission

FDL

Facility Data Link, consists of every other framing bit of an extended T1 superframe. The FDL is used to convey performance data, line test/loopback status, and other parameters for an ESF-framed T1 line. The FDL rate is 4 kHz.

FE1

Fractional E1

FEBE

Glossary -9