PEB 2091
PEF 2091
Operational Description
Table 21
M61
M42
M52
M62
M43
M44
M45
M46
M47
M48
Single Bits Control in NT Modes (Upstream)
1
PS1
1
MON-2
Pin PS1
MON-2
FEBE
PS2
NTM
CSO
1
CRC processor (IEC-Q) and MON-8
Pin PS2
MON-1
"0" (IEC-Q)
MON-2
SAI
1
State Machine (IEC-Q) / MON-2
MON-2
Table 22
Bit
Function of the Predefined SB in NT Modes
Function
ACT
(Activation bit)
The ACT-bit is part of the start-up sequence and is used to indicate layer 2
to be ready for communication. In this case it is set to (1)
CSO
SAI
(Cold Start Only)
The CSO-bit signals the network side whether the NT is only capable of
being started via cold start
(S Activity Indicator)
The SAI-bit informs the LT side about the state of the S-interface. With the
S-interface deactivated (i.e. C/I-commands TIM or DI received), the SAI-bit
is set to (0). Additionally the bit SAI is used (with SAI = (1)) in a terminal
initiated activation (if the U-interface was active before) to request complete
NT activation
FEBE
(Far-End Block Error)
The FEBE-bit is used to inform the opposite U-interface station that the
transmitted data could not be received free of errors. The device sets the
FEBE-bit to (0) if errors were observed. Each time a FEBE = (0) is detected,
the count of the internal far-end block error counter will be incremented.
Additionally it is possible to control the FEBE-bit with the MON-8-message
"SFB"
Semiconductor Group
117
Data Sheet 01.99
INFINEON [ Infineon ]
