[AsteriskBrasil] Erro ztcfg

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Estou recendo esse erro no final do ztcfg -vvv e gostaria de saber como
posso corrigi-lo. Gostaria tbm verificar como configuro o asterisk para
apenas 10 canais.

Asterisk 1.4.9 + Slackware 12.0 + DDR Telefonica 10 Canais + TE110P

zaptel.conf
loadzone=br
defaultzone=br
span=1,0,0,ccs,hdb3
span=1,1,0,cas,hdb3
cas=1-15:1101
dchan=16
cas=17-31:1101

root em asterisk:/# ztcfg -vvvv

Zaptel Version: 1.4.4
Echo Canceller: MG2
Configuration
======================

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

Channel map:

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

31 channels configured.

ZT_CHANCONFIG failed on channel 25: No such device or address (6)
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