Signaling operation, Receive signaling, Eceive – Rainbow Electronics DS21458 User Manual

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DS21455/DS21458 Quad T1/E1/J1 Transceivers

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17. 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.

17.1 Receive Signaling

Figure 17-1. Simplified Diagram of Receive Signaling Path

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