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15. SIGNALING OPERATION
There are two methods to access receive signaling data and provide transmit signaling data: processor-
based (i.e., software-based) or hardware-based. Processor-based refers to access through the transmit and
receive signaling registers, RS1–RS16 and TS1–TS16. Hardware-based refers to the TSIG and RSIG
pins. Both methods can be used simultaneously.
15.1 Receive Signaling
SIMPLIFIED DIAGRAM OF RECEIVE SIGNALING PATH Figure 17-1
RECEIVE SIGNALING
REGISTERS
CHANGE OF STATE
INDICATION
REGISTERS
SIGNALING
BUFFERS
ALL
ONES
RE-INSERTION
CONTROL
RSER
RSYNC
RSIG
T1/E1 DATA STREAM
PER-CHANNEL
CONTROL
SIGNALING
EXTRACTION