Instructions

PSI-MODEMSHDSL/SERIAL
5-4
PHOENIX CONTACT 104275_en_c00
025 Massive noise on the se-
rial interface
ERR LED and
DIAG LED on
On the serial interface there are
many too short periods of "zeros".
Cause: Incorrect data rate configu-
red (actual data rate is higher than
that of the device).
Check if the correct data rate is
configured.
026 Device initialization error ERR LED and
DIAG LED on
During startup of the device, a de-
fect was detected.
Replace the unit. Please specify
the error code in the complaint.
027 Software buffer overflow. ERR LED and
DIAG LED on
Data is received via the SHDSL in-
terface faster as it can be send
from the serial port.
If your system works with different
serial parameters: set the parame-
ters of all serial interfaces, espe-
cially the serial data rate, identical.
If the serial parameters are identi-
cal: decrease the serial data rate of
all serial interfaces or reduce the
data load.
If RS-232 or RS-422 interfaces are
used in a line structure, ensure that
they work only in half-duplex
mode.
028 Expected SHDSL data
rate could not be
reached.
ERR LED and
DIAG LED on
While the automatic connection
sequence, the expected SHDSL
data rate could not be achieved.
Since the configuration of the de-
vice is based on the expected data
rate, this can lead to errors.
Check if the settings for the line
length and the line diameter are
correct.
If the settings are correct: read the
actual achieved data rate from the
device (diagnose) and enter them
manually in the configuration as-
sistent.
Transfer the modified project to the
devices.
086 Low interference – Low interference or crosstalk If interferences occur frequently,
check the installation:
Check DSL installation:
– Check whether the wire
pair is connected correct-
ly (twisted pair, star quad
stranding).
– Check cables for line in-
terruption / short circuit
– If available, connect cable
shield
– Reduce DSL data rate
– Reduce external interferenc-
es, if possible
087 reserved
Table 5-1 Diagnostic IDs
No. Meaning LED Possible cause(s) Remedy