CHAPTER 4 INTERFACES
PRELIMINARY
NEC confidential and Proprietary
142
Table 4-5. OH Bytes That Cannot Be Changed from Insert Interface
A1
A2
Synchronization pattern is always transmitted.
B1
Section BIP-8 is transmitted.
B2
Line BIP-24 is always transmitted.
H1
H2
H3
Pointer is always transmitted.
TOH
M1
Line REI is always transmitted.
B3
Path BIP-8 is always transmitted.
POH
G1 (bits 1-4)
Path REI is always transmitted.
If the transmission of Line AIS, Line RDI, or Path RDI is specified by using a register or pin, alarm transmission
takes precedence, some bytes may be overwritten.
Table 4-6. OH Bytes That Cannot Be Changed When Alarm Is Transmitted
K2 (bits 6-8)
The
µ
PD98413 processing needed to transmit an alarm takes precedence and
'110' is transmitted if the automatic return function of Line RDI is effected, if the
LRDI bit of the CMALM register is set, or if ‘011’ code is input to the TALMA-C
pins.
G1 (bit 5-7)
If the automatic return function of (Enhance) Path RDI is effected, if the PRDI
[2:0] bits of the CMALM register is set, alarm transmission takes precedence,
and this bit is set to 1.
All bytes of
LOH and POH
When the
µ
PD98413 transmits alarm Line AIS, alarm transmission takes
precedence, and all the bits are set to 1 for transmission.
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