You dont appear to be reading all the messages in Aust_Modems,
so you may have missed this one which rather interesting.

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On my M34f I turned on AT\V6 recently (the undocumented call progress
statistics). Anyway while I was connected I typed +++ expecting to get
back to command mode. Instead I got a continuous update screen like this:

OK
Speed  EQM: max min av hex limit Rx-Dbm S10 S09  C=cts loss S=rlsd loss
28800  2067 039 032 034(22) 041   025   018 000

(and I was in pseudo command mode too, i.e. it accepted keyboard input
if I typed it in slowly).
@EOT:

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