STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
Expected PSL
Accepted PSL
PSLM State
UNEQ State
(Unequipped)
000
001
XXX
YYY
Mismatch
Match
Active
XXX U 000, 001,
(unequipped)
PDI Code
Inactive
Inactive
Inactive
XXX U 000, 001,
PDI Code
Match
XXX U 000, 001,
PDI Code
Mismatch
XXX U 000, 001,
PDI Code
Each time an incoming PSL differs from the one in the previous multiframe, 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 multiframes.
9.17 Receive Tributary Demapper (RTDM)
The Receive Tributary Demapper (RTDM) demaps up to 28 T1 or 21 E1 bit
asynchronous mapped signals from an STS-1 SPE, TUG3 within a STM-1/VC4
or STM-1 VC3 payload. The bit asynchronous T1 mapping consists of 104 octets
every 500 µs (2 KHz) and is shown in Table 3. The bit asynchronous E1 mapping
consists of 140 octets every 500us and is shown in Table 4.
Table 3
- Asynchronous T1 Tributary mapping
V5
RRRRRRIR
24 bytes - 8I
J2
C1C2OOOOIR
24 bytes - 8I
Z6
C1C2OOOOIR
24 bytes - 8I
Z7
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86
PMC [ PMC-SIERRA, INC ]
