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Chapter 3 – Fax Class 2 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 73
Current Sessions Parameters
Class 2.1 +FIS=
Write Syntax: +FIS=VR,BR,WD,LN,DF,EC,BF,ST,JP
Values: See Table 3.5
Default: 1,3,2,2,0,0,0,0,0
The +FIS parameter allows the host to sense and constrain the capabilities used for
the current session. The modem uses +FIS to generate DIS or DTC messages
directly, and uses +FIS and received DIS messages to generate DCS messages.
The modem sets the +FIS parameter from the +FCC parameter on initialization,
when +FCC is written, and at the end of a session.
Class 2 +FDIS=
Write Syntax: +FCC=VR,BR,WD,LN,DF,EC,BF,ST
Values: See Table 3.5
Default: 1,3,2,2,0,0,0,0
The Class 2 parameter is essentially the same as the Class 2.1 parameter except
that it lacks the JP subparameter, and the +FDIS parameter is set from the +FDCC
parameter.
Current Session Results
Class 2.1 +FCS?
Read syntax: +FCS?
Response: VR,BR,WD,LN,DF,EC,BF,ST,JP
Values: See Table 3.5
Default: 0,0,0,0,0,0,0,0,0
The +FCS parameter is loaded with the negotiated T.30 parameters for the current
session. A transmitting modem generates DCS; a receiving modem gets DCS from
the remote station. The host may only read this parameter.
The +FCS parameter is set to 0,0,0,0,0,0,0,0 on initialization, on +FIP command
execution, and at the beginning of a session. If the host issues a +FCS? command in
the initial state, the modem will report: <CR><LF>0,0,0,0,0,0,0,0<CR><LF>
The contents of +FCS are spontaneously reported during execution of +FDR (2.3.5)
or +FDT (2.3.3) commands by the +FCS:VR,BR,WD,LN,DF,EC,BF,ST,JP response,
using the same compound parameter format. See T.30 Phase B Negotiation
Responses section.
Class 2 +FDCS?
Read syntax: +FDCS?
Response: +FDCS=VR,BR,WD,LN,DF,EC,BF,ST or: +FDCS=
Values: See Table 3.5
Default: 0,0,0,0,0,0,0,0
The Class 2 parameter is essentially the same as the Class 2.1 parameter except
that the response lacks the JP subparameter.