zaptel.conf
===========
span=1,1,3,ccs,ami
span=2,0,3,ccs,ami
span=3,0,3,ccs,ami
span=4,0,3,ccs,ami

#BRI's:
bchan=1,2
dchan=3
bchan=4,5
dchan=6
bchan=7,8
dchan=9
bchan=10,11
dchan=12
loadzone=fr
defaultzone=fr

zapata.conf
===========
[channels]

switchtype = euroisdn

; p2mp TE mode (for connecting ISDN lines in point-to-multipoint mode)
signalling = bri_cpe_ptmp

pridialplan = dynamic
prilocaldialplan = local
nationalprefix = 0
internationalprefix = 00
usecallingpres=yes

echocancel = yes
echocancelwhenbridged = yes
echotraining = 100

context=isdn-incoming
group = 1

; S/T port 1-4
channel => 1-2
channel => 4-5
channel => 7-8
channel => 10-11

/var/log/asterisk/message
=========================
May  2 18:12:56 WARNING[11306] chan_zap.c: Detected alarm on channel 1: Red Alarm
May  2 18:12:56 WARNING[11306] chan_zap.c: Unable to disable echo cancellation on channel 1
May  2 18:12:56 WARNING[11306] chan_zap.c: Detected alarm on channel 2: No Alarm
May  2 18:12:56 WARNING[11306] chan_zap.c: Unable to disable echo cancellation on channel 2

ztcfg -vv output
================
Zaptel Configuration
======================

SPAN 1: CCS/ AMI Build-out: 399-533 feet (DSX-1)
SPAN 2: CCS/ AMI Build-out: 399-533 feet (DSX-1)
SPAN 3: CCS/ AMI Build-out: 399-533 feet (DSX-1)
SPAN 4: CCS/ AMI Build-out: 399-533 feet (DSX-1)

Channel map:

Channel 01: Clear channel (Default) (Slaves: 01)
Channel 02: Clear channel (Default) (Slaves: 02)
Channel 03: D-channel (Default) (Slaves: 03)
Channel 04: Clear channel (Default) (Slaves: 04)
Channel 05: Clear channel (Default) (Slaves: 05)
Channel 06: D-channel (Default) (Slaves: 06)
Channel 07: Clear channel (Default) (Slaves: 07)
Channel 08: Clear channel (Default) (Slaves: 08)
Channel 09: D-channel (Default) (Slaves: 09)
Channel 10: Clear channel (Default) (Slaves: 10)
Channel 11: Clear channel (Default) (Slaves: 11)
Channel 12: D-channel (Default) (Slaves: 12)

12 channels configured.