6F2S1916 (0.
5
)
GIF200
- 6 -
ITU-T G.703 I/F
GRL200
IED
GIF200 unit
Data based on
G.703
MUX
IEEE C37.94 I/F
(2)
Erroneous data
Data with “Yellow
alarm bit”
MUX
Data based on
G.703
(1)
(3)
Figure 2.7-2 O/E failure in GIF200
(iii)
G.703 reception failure detected in GIF200
If the GIF200 does not receive any data from the MUX, the GIF200 unit sends TX data
consisting of all ‘1’ bits for the GRL200 IED. As a result, the IED gets to detect the error
status of the MUX.
ITU-T G.703 I/F
GRL200
IED
GIF200 unit
Data based on
G.703
MUX
IEEE C37.94 I/F
(1)
No reception data
Data consisting of all
‘1’ bits
MUX
(2)
Data based on
C39.74
Figure 2.7-3 G.703 RX failure in GIF200
(iv)
G.703 transmission failure detected in MUX
If the MUX cannot receive data from the GIF200, the MUX issues the AIS by setting ‘1’ to all
bits in the frames, the AIS information is transferred to the remote MUX.
