PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Register 45H: XBAS AlarmTransmit
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
Unused
Unused
Unused
XYEL
X
X
X
X
X
X
0
R/W
R/W
XAIS
0
This register controls the transmission of YELLOW or AIS alarm.
XYEL:
The XYEL bit enables the XBAS to generate a YELLOW alarm in the
appropriate framing format. When XYEL is set to logic 1, XBAS is enabled to
set bit 2 of each channel to logic 0 for SF and SLC®96 formats, the Y-bit to
logic 0 for T1DM format, and XBAS is enabled to transmit repetitions of
1111111100000000 (the YELLOW Alarm BOC) on the FDL for ESF format.
When XYEL is set to logic 0, XBAS is disabled from generating the YELLOW
alarm.
XAIS:
The XAIS bit enables the XBAS to generate an unframed all-ones AIS alarm.
When XAIS is set to logic 1, the XBAS bi-polar outputs are forced to pulse
alternately, creating an all-ones signal. When XAIS is set to logic 0, the XBAS
bi-polar outputs operate normally.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
162
PMC [ PMC-SIERRA, INC ]
