PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 87

• Manufacturer Part Number: PM5380-BI
• Description: Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
When PSLMODE is low, an incoming PSL is accepted when it is received unchanged for five
consecutive frames. The accepted PSL is compared with the provisioned value. The PSL alarm
declarations are determined by Table 5.
Each time an incoming PSL differs from the one in the previous frame, the PSL unstable
counter is incremented. Thus, a single bit error in the PSL in a sequence of constant PSL values
will cause the counter to increment twice, once on the errored PSL and again on the first error-
free PSL. The incoming PSL is considered unstable, when the counter reaches five. The
counter is cleared when the same PSL is received for five consecutive frames.
Table 5 Path Signal Label Mismatch Mechanism
Expect
00
00
00
01
01
01
XX
XX
XX
XX
Note
·
When PSLMODE is high, the receive path signal mismatch alarm is declared based on the
declaration of a match or mismatch between the received label and the expected label. The
mismatch is set when five consecutive mismatches are declared. The mismatch is cleared when
five consecutive matches are declared. Table 6 shows the alarm declarations determined by the
different received and expected labels.
Table 6 Path Signal Label Mismatch Mechanism
XX, YY are equal to anything except 0x00 or 0x01 and are not equal to each other.
Expect
00
00
00
01
01
01
XX
XX
XX
XX
Receive
00
01
XX
00
01
XX
00
01
XX
YY
Receive
00
01
XX
00
01
XX
00
01
XX
YY
Action
Match
Mismatch
Mismatch
Mismatch
Match
Match
Mismatch
Match
Match
Mismatch
Action
Unequipped
Mismatch
Mismatch
Unequipped
Match
Match
Unequipped
Match
Match
Mismatch
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
Released
87