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(4) Frame output to line interface
The generated frame data is output from the line interface to the line side as serial data in sync with the 622.08-
MHz clock created by the internal synthesizer PLL.
(5) Transmission of alarm
By setting the CMALM register as necessary, alarm information, Line AIS, Path AIS, Line RDI, and Path RDI can
be inserted into a specific overhead area of a transmit frame for transmission.
Line RDI and Path RDI are automatically transmitted depending on the status of the reception side. Automatic
transmission can also be masked by setting the ALRDIM bit of the MDLOHT register (Line RDI) and the APRDIM
bit of the MDPOHT register (Path RDI). For details of transmitting an alarm, see Section 3.4.1 .
(6) Transmitting a pseudo frame generating error
A pseudo frame that causes the opposing receiver unit to detect an error is available for testing purposes. By
setting the pseudo error register (PESOH, PELOH, PEPTR, PEPOH, PTATM register), the transmission of
various pseudo frames is started. For details of the pseudo error frame transmission function, see Section 3.7 .
•
Types of pseudo frames generated
<1> LOS
<5> B1 error
<8> Line REI
CHAPTER 3 FUNCTIONAL OUTLINE
<2> OOF/LOF
<3> LOP
<6> B2 error
<7> B3 error
<9> Path REI
PRELIMINARY
<4> OCD/LCD
NEC confidential and Proprietary
45
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