PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
Registers 017H, 117H, 217H and 317H: ALMI Alarm Detection Status
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
REDD
X
X
X
X
X
X
X
X
R
R
R
YELD
AISD
These registers indicate the presence or absence of one or more T1 OOF
occurrences within the last 40ms; the presence or absence of T1 yellow alarm
over the last 40ms; and indicate the presence or absence of the AIS signal over
the last 60ms.
REDD:
When REDD is a logic 1, one or more T1 out of frame events have occurred
during the last 40ms interval. When REDD is a logic 0, no out of frame events
have occurred within the last 40ms interval.
YELD:
When YELD is logic 1, a valid yellow signal was present during the last 40ms
interval. When YELD is logic 0, the yellow signal was absent during the last
40ms interval. For each T1 framing format, a valid YELLOW signal is
deemed to be present if:
•
bit 2 of each channel is not logic 0 for 16 or fewer times during the
40 ms interval for the SF framing format;
•
the 16-bit yellow bit oriented code is received error-free 8 or more
times during the interval for the ESF framing format with a 4 kHz
data link;
•
the 16-bit yellow bit oriented code is received error-free 4 or more
times during the interval for the ESF framing format with a 2 kHz
data link.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
103
PMC [ PMC-SIERRA, INC ]
