PSF21150 INFINEON [Infineon Technologies AG], PSF21150 Datasheet - Page 67

• Manufacturer Part Number: PSF21150
• Description: IPAC-X ISDN PC ADAPTER CIRCUIT
• Manufacturer: INFINEON [Infineon Technologies AG]

3.3.11
The IPAC-X provides test and diagnostic functions for the S/T interface:
– The internal local loop (internal Loop A) is activated by a C/I command ARL or by
– The external local loop (external Loop A) is activated in the same way as the
– In remote line loop (RLP) received data is looped back to the S/T interface. The D-
Figure 35
Data Sheet
setting the bit LP_A (Loop Analog) in the TR_CMD register if the layer-1 statemachine
is disabled.
The transmit data of the transmitter is looped back internally to the receiver. The data
of the IOM-2 input B- and D-channels are looped back to the output B- and D-
channels.
The S/T interface level detector is enabled, i.e. if a level is detected this will be
reported by the Resynchronization Indication (RSY) but the loop function is not
affected.
Depending on the DIS_TX bit in the TR_CONF2 register the internal local loop can be
transparent or non transparent to the S/T line.
internal local loop described above. Additionally the EXLP bit in the TR_CONF0
register has to be programmed and the loop has to be closed externally as described
in
The S/T interface level detector is disabled.
This allows complete system diagnostics.
channel information received from the line card is transparently forwarded to the
output IOM-2 D-channel. The output B-channel information on IOM-2 is fixed to ‘FF’
while this test loop is active. The remote loop is programmable in TR_CONF2.RLP.
Figure
Test Functions
35.
SCOUT-S(X)
External Loop at the S/T-Interface
SR1
SR2
SX1
SX2
67
Description of Functional Blocks
100
100
PSB 21150
PSF 21150
2000-07-21
H