>Hello,

> I want to sync the e1 card with a HFC-s card, which is attached to my

> ISDN line.

> How do I have to interconnect the two cards?

>
> Best regards

> Björn

hi,

you need to find pin 118 of the E1 controller on the pcm bus (connector). this signal provides or receives the clock (4096khz) also find pin 119. it provides or receives frame sync (8khz).

connect them to the clock pin 54 and frame sync pin 55 of the HFC-S PCI ISDN controller. maybe choose a resistor of 1kohm to protect cards, if both card send output signals.

load mISDN driver module as "clock slave":

modprobe hfcmulti port=0x200 debug=0x40000

watch the kernel messages for clock selection process.

without clock connected, the hfcmulti module will fail. test that to see if the card trys to receive external clock. before you can use the clock from HFC-S, you must load hfcpci module. note that your E1 card is now card number 1 and not 0.

then you need to connect the HFC-S card to you isdn line. your card must activate interface. therefor a telephony application is required. but before, you need to see if your E1 card syncs to your HFC-S card. if your clock sync works, i will write a small application to set your isdn card into PTP mode (for durable link activation).

regards,

andreas