The modem library xx7 indicates an error -104

FAQ #101324

 

Problem
The xx7 modem library indicates an error -104.

Reason
This error indicates that an error occured during the initialisation of the port. Usually because the selected mode is not valid / supported.
Per example on the PCD3.Mxx7 the port 0 is per default configured as MPI port, see the related FAQ for more details. In case the modem library is using port 0 as well, this leads to error -104.

Solution
The default MPI configuration can be transfered to an other port (see related FAQ). In case the modem should be used with MPI protocol this has to be handled with the modem libary.