Owner's manual

DS2152
031897 3/79
Reader’s Note
This data sheet assumes a particular nomenclature of
the T1 operating environment. In each 125 us frame,
there are 24 eight–bit channels plus a framing bit. It is
assumed that the framing bit is sent first followed by
channel 1. Each channel is made up of eight bits which
are numbered 1 to 8. Bit number 1 is the MSB and is
transmitted first. Bit number 8 is the LSB and is trans-
mitted last. Throughout this data sheet, the following
abbreviations will be used:
D4 Superframe (12 frames per multiframe) Multiframe Structure
SLC–96 Subscriber Loop Carrier – 96 Channels (SLC–96 is an AT&T registered trademark)
ESF Extended Superframe (24 frames per multiframe) Multiframe Structure
B8ZS Biploar with 8 Zero Subsitution
CRC Cyclical Redundancy Check
Ft Terminal Framing Pattern in D4
Fs Signaling Framing Pattern in D4
FPS Framing Pattern in ESF
MF Multiframe
BOC Bit Oriented Code
HDLC High Level Data Link Control
FDL Facility Data LInk