Hmmm,

>     i4b-L2 i4b_T202_timeout: unit 0, N202 = 3
>     i4b-L3 T303_timeout: SETUP not answered, cr = 111
>     i4b-L3 next_l3state: FSM illegal state, state = ST_OW - Out Wait EST, event = EV_T303EXP - T303 timeout!

This typically is explained by interrupt problems (the card causing interrupts
which do not reach the driver).

But:

>     i4b-L1 isic_isac_irq: unit 0: CRC error
>     i4b-L1 isic_isac_irq: unit 0: Receive Aborted error
>     i4b-L2 i4b_ph_data_ind: ERROR, I-frame < 6 octetts!

This shows interrupts getting through (isic_isac_irq is the interrupt
handler for the D-channel).

This looks very much like broken cables.

Can you verify this card/cabling/setup works at all with another OS?
Does "vmstat -i" show some interrupts for the ISDN card?


Martin