A.2 TIA and ITU Standard ID Strings

In most of the above referenced standards, there are ID string comands defined, which could provide useful information to meet the requirements of PnP.

For those implemented, there is one command for Manufacturer ID, one for Model ID and one for revision code. These commands are commonly implemented as a handful of characters on one line, but they are allowed to be several lines, up to 2048 characters.

Table A-2 - +FCLASS values, command syntax, and implementation

FCLASS value	specification	Mfg ID	Model ID	Revision ID
0	TIA-602, etc	-	-	-
0	TIA IS-131	+GMI?	+GMM?	+GMR?
0	ITU V.25ter	+GMI?	+GMM?	+GMR?
0	PCCA XSTD-101	+FMI?	+FMM?	+FMR?
0	PCCA STD-101	+GMI?	+GMM?	+GMR?
1	TIA-578	-	-	-
1	TIA-578-A	+FMI?	+FMM?	+FMR?
1.0	ITU T.class1	+GMI?	+GMM?	+GMR?
2	TIA SP-2388 (1990 Class 2)	+FMFR?	+FMDL?	+FREV?
2.0	TIA-592	+FMI?	+FMM?	+FMR?
2.0	ITU T.class2	+GMI?	+GMM?	+GMR?
2.0	TIA IS-99	+FMI?	+FMM?	+FMR?
2.0	TIA IS-135	+FMI?	+FMM?	+FMR?
8	TIA IS-101	+FMI?	+FMM?	+FMR?
80	VoiceView 1.0	+FMI?	+FMM?	+FMR?

Note that TIA IS-131 and ITU-T Recommendation V.25ter also include +GSN?, to request the modem's serial number, and +GOI, to request the modem's X.208 formatted Global Object Identifier, if provided.