the problem:
.[Mar  7 12:49:51] ERROR[8193]: chan_zap.c:9357 start_pri: Unable to open D-channel 55 (No such device or address)
[Mar  7 12:49:51] ERROR[8193]: chan_zap.c:11268 setup_zap: Unable to start D-channel on span 2

ztcfg -vvv :

Zaptel Version: 1.4.8
Echo Canceller: MG2
Configuration
======================

SPAN 1: CCS/HDB3 Build-out: 0 db (CSU)/0-133 feet (DSX-1)
SPAN 2: CAS/ AMI Build-out: 0 db (CSU)/0-133 feet (DSX-1)

Channel map:

Channel 01: Clear channel (Default) (Slaves: 01)
Channel 02: Clear channel (Default) (Slaves: 02)
Channel 03: Clear channel (Default) (Slaves: 03)
Channel 04: Clear channel (Default) (Slaves: 04)
Channel 05: Clear channel (Default) (Slaves: 05)
Channel 06: Clear channel (Default) (Slaves: 06)
Channel 07: Clear channel (Default) (Slaves: 07)
Channel 08: Clear channel (Default) (Slaves: 08)
Channel 09: Clear channel (Default) (Slaves: 09)
Channel 10: Clear channel (Default) (Slaves: 10)
Channel 11: Clear channel (Default) (Slaves: 11)
Channel 12: Clear channel (Default) (Slaves: 12)
Channel 13: Clear channel (Default) (Slaves: 13)
Channel 14: Clear channel (Default) (Slaves: 14)
Channel 15: Clear channel (Default) (Slaves: 15)
Channel 16: D-channel (Default) (Slaves: 16)
Channel 17: Clear channel (Default) (Slaves: 17)
Channel 18: Clear channel (Default) (Slaves: 18)
Channel 19: Clear channel (Default) (Slaves: 19)
Channel 20: Clear channel (Default) (Slaves: 20)
Channel 21: Clear channel (Default) (Slaves: 21)
Channel 22: Clear channel (Default) (Slaves: 22)
Channel 23: Clear channel (Default) (Slaves: 23)
Channel 24: Clear channel (Default) (Slaves: 24)
Channel 25: Clear channel (Default) (Slaves: 25)
Channel 26: Clear channel (Default) (Slaves: 26)
Channel 27: Clear channel (Default) (Slaves: 27)
Channel 28: Clear channel (Default) (Slaves: 28)
Channel 29: Clear channel (Default) (Slaves: 29)
Channel 30: Clear channel (Default) (Slaves: 30)
Channel 31: Clear channel (Default) (Slaves: 31)
Channel 32: Clear channel (Default) (Slaves: 32)
Channel 33: Clear channel (Default) (Slaves: 33)
Channel 34: D-channel (Default) (Slaves: 34)

34 channels to configure.


zaptel_hardware output:
Argument "IRQ" isn't numeric in numeric comparison (<=>) at /usr/share/perl5/Zaptel/Span.pm line 114.
pci:0000:00:09.0     wcte11xp+    e159:0001 Digium Wildcard TE110P T1/E1 Board
driver should be 'zaphfc' but is actually 'vzaphfc'
pci:0000:00:0b.0     zaphfc+      1397:2bd0 HFC-S ISDN BRI card

zaptel.conf:

span=1,1,0,ccs,hdb3,crc4
bchan=4-18,20-34
dchan=19
#bchan=17-31
#clear=1-24
loadzone=nl
#loadzone=be
defaultzone=nl

span=2,2,0,cas,ami
bchan=1-2
dchan=3
defaultzone=nl

zapata.conf:
[channels]
language=nl                             ; play dutch sound files if possible
context=incoming                        ; default context is incoming
;musiconhold=default                    ; uncomment to enable music on hold
switchtype=euroisdn                     ; euroisdn is used in the netherlands
pridialplan=unknown                     ; unknown is needed for the netherlands
prilocaldialplan=unknown                ; unknown is needed for the netherlands
signalling=pri_cpe
nationalprefix=0
internationalprefix=00
faxdetect=incoming

localprefix=010
privateprefix=24360

callwaiting=yes
callwaitingcallerid=yes
cancallforward=yes
usecallerid=yes
hidecallerid=no
usecallingpres=yes
echocancel=yes
echocancelwhenbridged=no
echotraining=yes
group=1
immediate=no
busydetect=no
busycount=3
callerid=asreceived
channel=>4-18
txgain=-3.0
;rxgain=6.5
;channel => 17-31

switchtype=euroisdn
signalling=pri_cpe
group = 2
context=misdn
channel=>32-33