did you load hfcmulti.ko with dslot=1 parameter? this is required to move dchannel slot from 16 to 1.
 
 
 > Mon May 25 16:07:39 2009 <1000> input/misdn.c:125 alen =6, dev(0) channel(0) sapi(63) tei(127)
 > Mon May 25 16:07:39 2009 <1000> input/misdn.c:128 <= len = 12, prim(0x8) id(0x7f3f): DL_INFORMATION_IND
 > Mon May 25 16:07:39 2009 <1000> input/misdn.c:135 DL_INFORMATION_IND: use channel(0) sapi(63) tei(127) for now
 ISDN message for unknown sign_link
 >