Multi-Tech Systems MT5634SMI V.92 ユーザーズマニュアル

 

 

Chapter 3 – Fax Class 2 Commands 

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 

 

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A MultiModem modem will report its Service Class capabilities, both the current setting and the range 
of services available. This is provided by the +FCLASS parameter. Currently-defined values for the 
+FCLASS parameter are:  

0 Data 

modem 

1 

Fax Service Class 1 (TIA-578, ITU-T.31)  

1.0 

Fax Service Class 1.0 (ITU-T T.31, Amendment 1)  

2 

Fax Service Class 2 (EIA 29.2) 

2.0 

Fax Service Class 2.0 (ITU-T T.32) 

2.1 

Fax Service Class 2.1 (ITU-T T.32 Amendment 1) 

3-7 Reserved 

(not 

supported) 

8 Voice 

modem 

9-255 Reserved 

(not 

supported) 

[None] Not 

supported 

The +FCLASS factory default setting is +FCLASS=0. When +FCLASS is set to other than 0 and a call 
is made, but the call fails or the modem is disconnected, the +FCLASS value returns to the default 
setting (+FCLASS=0). 

A modem’s current Service Class setting is tested by the +FCLASS? command. The 
response is a single value. 

 

Same as Class 2.1. 

The Service Classes available from a modem are tested by the +FCLASS=? 
command. The response is a string of values separated by commas. A Class 2.1 
MultiModem can respond: 

 

Example: <CR><LF>0,1,2,1.0,2.0,2.1,8<CR><LF>OK<CR><LF>. 

A Class 2 MultiModem responds similarly; however, older Multi-Tech modems that 
do not support Class 2.1 report fewer options.