the device, based on the ISO system for registering unique object identifiers. Typically, the
text consists of a single line containing numeric strings delimited by period characters. The
general format of object identifiers is defined in Section 28 of ITU-T Recommendation
X.208; the encoding rules are defined in ITU-T Recommendation X.209. The response is
provided by the .INF file.
Syntax
+GOI
Typical Response
+GOI:
OK
+GCAP - Request Complete Capabilities List
This extended-format command causes the modem to transmit one or more lines of
information text listing additional capabilities c<name>s , which is intended to
permit the user to identify the overall capabilities of the modem. In particular, if the modem
implements a particular modem control standard that uses Extended Syntax Commands, and if
that modem control standard includes command(s) that indicate general capabilities, the
+<names>(s) of those commands will be reported to the modem in response to a +GCAP
command.
Syntax
+GCAP
Example Responses
+GCAP: +FCLASS, +MS, +ES, +DS, for a data modem that supports all capabilities listed Where:
+FCLASS T.class1, +F (Class 1 Facsimile modem Control)
+MS +M commands (Modulation Control: +MS and +MR commands)
+ES +E commands (Error Control: +ES, +EB, +ER, +EFCS, +ETBM)
+DS +D commands (Data Compression: +DS and +DR)
+GCI - Country of Installation
This extended syntax command indicates and selects the country of installation for the
modem. This parameter selects the settings for any operational parameters that need to be
adjusted for national regulations or telephone networks.
Syntax
+GCI=<country_code>
Defined Values
<country_code> 8-bit country code from Annex A of T.35. The value is the
hexadecimal equivalent of the T.35 code, with bit 8 treated as the
most significant bit and bit 1 treated as the least significant bit.
Default
If the modem is specified for use in only one country, that country code is the default.
Otherwise, the default is the expected country of sale or first installation. The modem may use
hardware means to select the country of installation, in which case the modem uses that to
determine the default value.
Reporting Current or Selected Values
Command: +GCI?
Response: +GCI: <current country_code>
Example: +GCI: 3D Indicates that the modem is set for France.
Reporting Supported Range of Parameter Values
Command: +GCI=?
Response: +GCI: (<country_code>[,<country_code>[,<country_code].......])
Example: +GCI: (20,73,B5) The modem can be set for Canada, Mexico or the United States.
3.2.2 DTE-Modem interface commands