ZOOM TELEPHONICS, INC.
VFX 28.8
| 
 Card Type  | 
 Fax, Modem (asynchronous)  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Maximum Data Rate  | 
 28.8Kbps  | 
| 
 Maximum Fax Rate  | 
 14.4Kbps  | 
| 
 Data Bus  | 
 External  | 
| 
 Fax Class  | 
 Unidentified  | 
| 
 Data Modulation Protocol  | 
 Unidentified  | 
| 
 Fax Modulation Protocol  | 
 Unidentified  | 
| 
 Error Correction/Compression  | 
 Unidentified  | 
V2022
| 
 CONNECTIONS  | ||||||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | |||
| 
 Line out  | 
 CN1  | 
 DC power  | 
 CN4  | |||
| 
 Line in  | 
 CN2  | 
 Power switch  | 
 SW1  | |||
| 
 RS-232/422  | 
 CN3  | |||||
| 
 MISCELLANEOUS TECHNICAL NOTES  | 
Note: Diagram not available.  | 
| 
 DIAGNOSTIC LED(S)  | |||
| 
 LED  | 
 Color  | 
 Status  | 
 Condition  | 
| 
 MSG  | 
 Red  | 
 On  | 
 Used by software applications. Faxes are waiting  | 
| 
 MSG  | 
 Red  | 
 Off  | 
 Used by software applications. Faxes are not waiting  | 
| 
 FAX  | 
 Red  | 
 On  | 
 Modem is connected in FAX mode  | 
| 
 FAX  | 
 Red  | 
 Off  | 
 Modem is not connected in FAX mode  | 
| 
 28.8  | 
 Red  | 
 On  | 
 Modem connected at 28.8Kbps  | 
| 
 28.8  | 
 Red  | 
 Off  | 
 Modem not connected at 28.8Kbps  | 
| 
 VFC  | 
 Red  | 
 On  | 
 Modem connected using V.FC  | 
| 
 VFC  | 
 Red  | 
 Off  | 
 Modem not connected using V.FC  | 
| 
 14.4  | 
 Red  | 
 On  | 
 Modem connected at 14.4Kbps (V.FC, V.32bis, or FAX mode)  | 
| 
 14.4  | 
 Red  | 
 Off  | 
 Modem not connected at 14.4Kbps (V.FC, V.32bis, or FAX mode)  | 
| 
 DC  | 
 Red  | 
 On  | 
 Data compression (V.42bis or MNP5) enabled  | 
| 
 DC  | 
 Red  | 
 Off  | 
 Data compression (V.42bis or MNP5) disabled  | 
| 
 EC  | 
 Red  | 
 On  | 
 Error correction (V.42 or MNP4) enabled  | 
| 
 EC  | 
 Red  | 
 Off  | 
 Error correction (V.42 or MNP4) disabled  | 
| 
 FC  | 
 Red  | 
 On  | 
 Flow control enabled and data buffers not full  | 
| 
 FC  | 
 Red  | 
 Off  | 
 Flow control disabled or data buffers full  | 
| 
 AA  | 
 Red  | 
 On  | 
 Auto-answer enabled  | 
| 
 AA  | 
 Red  | 
 Off  | 
 Auto-answer disabled  | 
| 
 AA  | 
 Red  | 
 Blinking  | 
 Phone is ringing  | 
| 
 CD  | 
 Red  | 
 On  | 
 Carrier signal detected  | 
| 
 CD  | 
 Red  | 
 Off  | 
 Carrier signal not detected  | 
| 
 OH  | 
 Red  | 
 On  | 
 Modem is off-hook  | 
| 
 OH  | 
 Red  | 
 Off  | 
 Modem is on-hook  | 
| 
 RD  | 
 Red  | 
 On  | 
 Modem is receiving data  | 
| 
 RD  | 
 Red  | 
 Off  | 
 Modem is not receiving data  | 
| 
 SD  | 
 Red  | 
 On  | 
 Modem is transmitting data  | 
| 
 SD  | 
 Red  | 
 Off  | 
 Modem is not transmitting data  | 
| 
 TR  | 
 Red  | 
 On  | 
 DTR signal is high  | 
| 
 TR  | 
 Red  | 
 Off  | 
 DTR signal is low  | 
| 
 MR  | 
 Red  | 
 On  | 
 Power is on  | 
| 
 MR  | 
 Red  | 
 Off  | 
 Power is off  | 
Proprietary AT Command Set
See document V2021 for a full command summary.