asterisk cli:

zap show status
Description                              Alarms     IRQ        bpviol     CRC4
T4XXP (PCI) Card 0 Span 1                RED        0          0          0
T4XXP (PCI) Card 0 Span 2                UNCONFIGUR 0          0          0
T4XXP (PCI) Card 0 Span 3                UNCONFIGUR 0          0          0
T4XXP (PCI) Card 0 Span 4                UNCONFIGUR 0          0          0

zapata.conf
[channels]
group=1
language=en
usecallerid=yes
callerid=asreceived
context=default
echocancel=64
echocancelwhenbridged=yes
rxgain=1.0
txgain=1.0
signalling=pri_cpe
switchtype=5ess
channel => 1-23

zaptel.conf
loadzone=us
defaultzone=us
span=1,0,0,esf,b8zs
bchan=1-23
dchan=24