| When enabled during kernel configuration, the tty emulator |
| of the ISDN subsystem is capable of the Fax Class 2 commands. |
| This only makes sense under the following conditions : |
| - You need the commands as dummy, because you are using |
| hylafax (with patch) for AVM capi. |
| - You want to use the fax capabilities of your isdn-card. |
| (supported cards are listed below) |
| NOTE: This implementation does *not* support fax with passive |
| ISDN-cards (known as softfax). The low-level driver of |
| the ISDN-card and/or the card itself must support this. |
| Eicon DIVA Server BRI/PCI |
| - full support with both B-channels. |
| Eicon DIVA Server 4BRI/PCI |
| - full support with all B-channels. |
| Eicon DIVA Server PRI/PCI |
| - full support on amount of B-channels |
| depending on DSPs on board. |
| The command set is known as Class 2 (not Class 2.0) and |
| can be activated by AT+FCLASS=2 |
| The interface between the link-level-module and the hardware-level driver |
| is described in the files INTERFACE.fax and INTERFACE. |