User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Glossary
Rev. B - 1/97
D-7
UAS one-second interval during which Radio Sync Loss is active.
Yellow Alarm The indicator of a remotely-detected failure, such as an Out-
of-Frame (OOF) condition. When a Red alarm is declared, a
Yellow alarm is transmitted in the opposite direction. In the
ESF format, a Yellow alarm is signaled by a transmission of
alternating eight ones and eight zeros in the ESF Data Link
bits. In the D4 format, a Yellow alarm is signaled by a
transmission of a logical zero in the second bit of each channel
(24 channels per frame).
Zero Suppression The function performed by several different coding techniques
(e.g., B8ZS, Ones Insertion Mode, Cylink Ones Density
Controller) that are designed to remove long strings of zeros
from data transmission.