| The driver for the HFC-PCI and HFC-PCI-A chips from CCD may be used |
| for many OEM cards using this chips. |
| Additionally the driver has a special feature which makes it possible |
| to read the echo-channel of the isdn bus. So all frames in both directions |
| may be logged. |
| When the echo logging feature is used the number of available B-channels |
| for a HFC-PCI card is reduced to 1. Of course this is only relevant to |
| the card, not to the isdn line. |
| To activate the echo mode the following ioctls must be entered: |
| |
| hisaxctrl <driver/cardname> 10 1 |
| |
| This reduces the available channels to 1. There must not be open connections |
| through this card when entering the command. |
| And then: |
| |
| hisaxctrl <driver/cardname> 12 1 |
| |
| This enables the echo mode. If Hex logging is activated the isdnctrlx |
| devices show a output with a line beginning of HEX: for the providers |
| exchange and ECHO: for isdn devices sending to the provider. |
| |
| If more than one HFC-PCI cards are installed, a specific card may be selected |
| at the hisax module load command line. Supply the load command with the desired |
| IO-address of the desired card. |
| Example: |
| There tree cards installed in your machine at IO-base addresses 0xd000, 0xd400 |
| and 0xdc00 |
| If you want to use the card at 0xd400 standalone you should supply the insmod |
| or depmod with type=35 io=0xd400. |
| If you want to use all three cards, but the order needs to be at 0xdc00,0xd400, |
| 0xd000 you may give the parameters type=35,35,35 io=0xdc00,0xd400,0xd00 |
| Then the desired card will be the initialised in the desired order. |
| If the io parameter is used the io addresses of all used cards should be |
| supplied else the parameter is assumed 0 and a auto search for a free card is |
| invoked which may not give the wanted result. |
| |
| Comments and reports to werner@isdn4linux.de or werner@isdn-development.de |
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