AEG Eclipse 10 - Manual (Page 30)

15.7 If the fault persists...
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Disconnect all other instruments connected to the same line and try to make a call.
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Disconnect the base unit from the telephone line and plug a different phone. Try making a call. If this
works, the line is OK.
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If the call does not work and you are using a two-way socket adapter, remove it and plug a telephone
directly into the socket.
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If the call now works, the adapter may be faulty.
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If you cannot make a call, the fault may be on the exchange line. Contact the service provider.