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Diffstat (limited to 'Documentation/isdn/README.hfc-pci')
| -rw-r--r-- | Documentation/isdn/README.hfc-pci | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/isdn/README.hfc-pci b/Documentation/isdn/README.hfc-pci new file mode 100644 index 000000000..94e0d4352 --- /dev/null +++ b/Documentation/isdn/README.hfc-pci @@ -0,0 +1,26 @@ +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. + +Comments and reports to werner@isdn4linux.de or werner@titro.de . + + + |