Error Messages - Devolo MicroLlink User Manual

Incoming call – RI = Ring Indicator
This MicroLink ISDN i output becomes active (ON) when the adapter detects
an incoming call (see also command ATA). Incoming calls are detected only
if the DTR control line is active (ON) or the command AT&D0 has been
issued.
Connection – DCD = Data Carrier Detect
This MicroLink ISDN i output normally becomes active (ON) when the adapter
has established a valid connection.
3.4

Error messages

In the event of errors, the contents of the registers S154 and S155 return error
codes which may be used to localize the problem. These registers can be
read using the commands ATS154? or ATS155?.
Error
codes
S154/S155
AT-level error group
001/001
001/003
001/004
001/005
001/006
001/007
001/009
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AT commands: Detailed description
Description
Establishment of connection
aborted by character input dur-
ing establishment
Call not (no longer) present
(with ATA or ATO)
Internet service provider proto-
col error at the serial port
Connection aborted by ATZ
Inactivity timer elapsed (con-
nection aborted)
Establishment of connection
aborted by DTR = off
Establishment of connection
aborted by ATH
Cause and possible correction
Input of characters during establishment
of connection not permitted. If the input
of characters is to be permitted during
call establishment, bit 6 must be set in
register S14 (polling enabled during
establishment of connection).
Opposite station has hung up or another
unit has answered the call.
Reestablish the connection.
The command ATZ in the command
phase causes the abort of an existing
connection.
No more data was transmitted during
the time period specified in register S30
or by the AT\Tn command.
The DTR signal was deactivated, e.g. by
the terminal program.
Establishment of connection canceled.
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devolo MicroLink ISDN i
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