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STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
254
SPATINV:
The SPATINV bit is a diagnostic control bit. When set to logic 1, SPATINV
forces the signaling multiframe alignment signal written into bits 1-4 of TS16
of frame 0 of the signaling multiframe to be inverted (i.e., the correct signaling
multiframe alignment signal, 0000, is substituted with 1111); when set to
logic 0, the signaling multiframe alignment signal is unchanged.
RAI:
The RAI bit controls the transmission of the Remote Alarm Indication signal.
A logic 1 in the RAI bit position causes bit 3 of NFAS frames to be forced to
logic 1; otherwise, bit 3 of NFAS frames is a logic 0 unless the
AUTOYELLOW register bit is set and a receive defect is present.
YBIT:
The YBIT bit controls the transmission of the signaling multiframe Alarm
Indication Signal. A logic 1 in the YBIT bit position causes the Y-bit (bit 6) of
TS16 of frame 0 of the signaling multiframe to be forced to logic 1; otherwise,
the Y-bit is a logic 0.
Reserved:
This bit must be set to a logic 0 for correct operation.
AIS:
The AIS bit controls the transmission of the Alarm Indication Signal (unframed
all-ones). A logic 1 in the AIS bit position forces the output streams to logic 1.
When the COMET is reset, the contents of this register are set to logic 0.