User Guide

Chapter 3 – Fax Class 2 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 75
Table 3.5. T.30 Session Subparameter Codes
Note: Class 2.0/2.1 is shown in hexadecimal values. Class 2 is shown is decimal values.
Label Function Class 2.0/2.1 Class 2 Description
VR Vertical
resolution
(Note 1)
00h
01h
*02h
*04h
*08h
*10h
*20h
*40h
*Class 2.1 only
0
1
R8 × 3.85 l/mm, (98 dpi) Normal
R8 × 7.7 l/mm, (196 dpi) Fine
R8 × 15.4 l/mm
R16 × 15.4 l/mm
200 dpi × 100 l/25.4 mm
200 dpi × 200 l/25.4 mm
400 dpi × 400 l/25.4 mm
300 dpi × 300 l/25.4 mm
Bit rate
(Note 2)
0h
1h
2h
3h
4h
5h
0
1
2
3
+FCC/+FIS description
2 400 bit/s preferred
4 800 bit/s preferred
7 200 bit/s preferred
9 600 bit/s preferred
12 000 bit/s preferred
14 400 bit/s preferred
all with V.8 optional
+FCS description
2 400 bit/s selected
4 800 bit/s selected
7 200 bit/s selected
9 600 bit/s selected
12 000 bit/s selected
14 400 bit/s selected
6h
7h
8h
9h
Ah
Bh
Ch
Dh
Class 2.1 only
16 800 bit/s preferred
19 200 bit/s preferred
21 600 bit/s preferred
24 000 bit/s preferred
26 400 bit/s preferred
28 800 bit/s preferred
31 200 bit/s preferred
33 600 bit/s preferred
all with V.8 implied
16 800 bit/s selected
19 200 bit/s selected
21 600 bit/s selected
24 000 bit/s selected
26 400 bit/s selected
28 800 bit/s selected
31 200 bit/s selected
33 600 bit/s selected
BR
V.34 bit rate
(Class 2.1
only)
Eh Reserved Reserved
WD Page width in
pixels
0h
1h
2h
0
1
2
R8 R16 200 300 400
d/mm d/mm dpi dpi dpi
1728 3456 1728 2592 3456
2048 4096 2048
2432 4864 2432
LN Page length 0h
1h
2h
0
1
2
A4, 297 mm
B4, 364 mm
Unlimited length
DF Data
compression
format
0h
1h
3h
0
1
1-D modified Huffman (T.4)
2-D modified read (T.4)
2-D modified read (T.6)
EC Error
correction,
T.30
0h
1h
0
1
2
Disable ECM
64-byte frames, Annex A/T.30
256-byte frames, Annex A/T.30
BF Binary file
transfer
00h 0 Disable file transfer modes
ST Scan time/line
0h
1h
2h
3h
4h
5h
6h
7h
0
1
2
3
4
5
6
7
VR = 0
0 ms
5 ms
10 ms
10 ms
20 ms
20 ms
40 ms
40 ms
VR > 0
0 ms
5 ms
5 ms
10 ms
10 ms
20 ms
20 ms
40 ms