This machine supports T.37 full mode. (ITU-T Recommendation, RFC2532). The difference between T.37 simple mode and full mode is as follows.
Function  | T.37 Simple Mode  | T.37 Full Mode  | 
|---|---|---|
Resolution  | 200 x 100 200 x 200  | 200 x100 200 x 200 200 x 400 400 x 400 (if available)  | 
RX Paper Width  | A4, 8.5” x 14”  | A4, B4, A3  | 
RX Data Compression Method  | MH  | MH (default), MR, MMR,  | 
Signals  | Image data transmission only  | Image data transmission, exchange of capability information between the two terminals, and acknowledgement of receipt of fax messages  |