PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
Register 2CH: ALMI Configuration
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Unused
Unused
Unused
ESF
X
X
X
0
R/W
R/W
R/W
FMS1
0
FMS0
0
Unused
Unused
X
X
This register allows selection of the framing format and the data rate of the
Facility Data Link in ESF to allow operation of the CFA detection algorithms.
ESF:
The ESF bit selects either extended superframe format or enables the frame
mode select bits to select either regular superframe, T1DM, "alternate" T1DM,
or SLC®96 framing formats. A logic 1 in the ESF bit position selects ESF; a
logic 0 bit enables FMS1 and FMS0 to select SF, T1DM, "alternate" T1DM, or
SLC®96.
FMS1,FMS0:
The FMS1 and FMS0 bits select standard superframe, T1DM, "alternate"
T1DM, or SLC®96 framing formats. A logic 00 in these bits enable the SF
framing format; a logic 01 in these bit positions enable the T1DM framing
format; a logic 10 in these bit positions enable the SLC®96 framing format;
and a logic 11 in these bit positions enable the "alternate" T1DM framing
format.The "alternate" T1DM framing format configures the ALMI to process
the RED ALARM as if the SF, SLC®96, or ESF framing format were selected;
the YELLOW ALARM is still processed as T1DM.
When ESF is selected (ESF bit set to logic 1), the FMS1 and FMS0 bits
select the data rate and the source channel for the Facility Data Link (FDL)
data. A logic 00 in these bits enables the ALMI to receive FDL data and
validate the YELLOW alarm at the full 4 kbit rate. A logic 01 or 10 in these bits
enables the ALMI to receive FDL data and validate the YELLOW alarm at a 2
kbit rate.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
122
PMC [ PMC-SIERRA, INC ]
