Perle Systems 833IS - Manual (Page 272)

AT Commands
256 Perle 833IS User Guide
Reporting Selected
Options
The modem can send a string of information to the DTE consisting of selected
options using the following command:
+MS?
The response is:
+MS: ,,,
There may be additional values displayed after the field, but they are
not applicable.
For example,
+MS: 56,1,300,56000
Reporting
Supported Options
The modem can send a string of information to the DTE consisting of supported
options using the following command:
+MS=?
The response is:
+MS: (list of supported values), (list of supported values), (list
of supported values),
(list of supported values)
For example,
+MS: (0,1,2,3,9,10,11,56, 64,69),(0,1),(300-33600),(300-56000)
There may be additional values displayed after the field, but they are
not applicable.