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AT commands: Detailed description
57
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devolo MicroLink ISDN i
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EN
052/131 Service not available at own or
remote connection or dialing of
an incorrect number
Check the dial number and the enabling
of the desired services (also applies to
PBX systems).
052/138 Own connection is busy. Connection is in use by other terminal
devices. End existing connection if nec
-
essary.
052/144 Semi-permanent connection
(SPC) not supported by network
SPC must be requested from network
operator.
052/145 Requested service not available Service must be requested from network
operator.
052/160 Outgoing connection blocked Have blockage removed by network
operator.
052/161 Remote station busy Dial again later.
052/165 Semi-permanent connection
(SPC) not permitted between
these subscribers
SPC must be requested from network
operator.
052/181 Target number, service or serv-
ice characteristic incorrect
Check the dial number and the enabling
of the desired services (also applies to
PBX systems).
052/184 Target dial number has changed Obtain new number from the remote
station.
052/185 From remote terminal unit: Not
operational
Check the operational readiness of the
remote station.
052/186 Remote terminal unit does not
answer
Check the operational readiness of the
remote station and the terminal selec
-
tion digit of the dial number.
052/187 Message from remote terminal
unit: Unit busy
Dial again later.
052/189 Target subscriber: Blocked
against incoming connections
Check with remote station regarding
blockage.
052/190 Target subscriber rejected con-
nection
Check with remote station.
052/217 Network bottleneck (e.g. con-
gestion)
Dial again later.
Error
codes
S154/S155
Description Cause and possible correction
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