PEB 2091
PEF 2091
Operational Description
DI
Deactivation Indication
Idle code on the IOM®-2-interface. Normally the IEC-Q stays in the
"Deactivated" state unless an activation procedure is started by the NT side.
EI2
Error Indication 2
EI2 is issued if the received ACT-bit is (0). The NT receiver indicates a loss
of signal or framing on the S/T-interface by setting the upstream ACT-bit to
(0). The IEC-Q remains in the "Transparent" state. After a signal level or
framing is detected again, the C/I-indication AI will be issued anew.
EI3
Error Indication 3
This indication is issued when the IEC-Q has not been able to activate
successfully (expiry of timer T1).
LSL
Loss of Signal Level
The IEC-Q has entered a failure condition after loss of signal level (LSUE).
RSY
Re-Synchronization indication after a loss of framing (LOF)
For EI3, LSL and RSY indication the LT side should react by applying the
C/I-channel code RES1 to allow the IEC-Q to enter the "Receive reset" state
and to reset the Receiver functions.
FJ
Frame Jump
This indication signals that either a data buffer overflow/underflow has been
detected or a phase jump of one of the IOM®-2-timing signals DCL or FSC
has occurred. The FJ-code is issued for a period of 1.5 ms.
HI
High Impedance
PFOFF is activated which means that the remote-power-feed circuit for the
subscriber line is turned off.
UAI
U-Activation Indication
The UAI-code signals that the line system is synchronized in both directions
of transmission (see also the input ACT = 1). Maintenance bits are
transmitted normally.
ARM
INT
Activation Request Maintenance
Transmission of maintenance bits is possible.
Interrupt (Stand-alone mode only)
A level change on input pin INT triggers the transmission of this C/I code for
four successive IOM®-2 frames. Please refer to "Interrupt", page 197 for
details.
Semiconductor Group
155
Data Sheet 01.99
INFINEON [ Infineon ]
