>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