ME310G1/ME910G1/ML865G1 AT Commands Reference Guide
80617ST10991A Rev. 11 Page 409 of 1039 2021-09-23
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Test command returns the OK result code.
In case that a directly routed message must be buffered in ME/TA
(possible when +CNMI parameter <mode> equals 0 or 2) or AT
interpreter remains too long in a state where result codes cannot be
sent to TE (e.g. user is entering a message using +CMGS),
acknowledgement (RP-ACK) is sent to the network without waiting
+CNMA command from TE.
It has been necessary to take the following decision to get over any
incoherence problem, due to the possibility to have
contemporaneous different settings of parameter <mt> and <ds> of
the +CNMI command in different sessions (see #PORTCFG and
+CMUX): only the <mt> and <ds> setting for session "0" are
considered as valid to decide if +CNMA acknowledgment is expected
or not.