zapata.conf:

usecallerid=yes
group=0
callgroup=0
pickupgroup=0
immediate=no

context=test-in
signalling=fxs_ks

callerid="Channel 1" <6001>
mailbox=6001
channel => 1

callerid="Channel 2" <6002>
mailbox=6002
channel => 2

callerid="Channel 3" <6003>
mailbox=6003
channel => 3

callerid="Channel 4" <6004>
mailbox=6004
channel => 4




*CLI> show dialplan test-in
[ Context 'test-in' created by 'pbx_config' ]
  's' =>            1. Answer()                                   [pbx_config]
                    2. Wait(1)                                    [pbx_config]
                    3. Playback(demo-echotest)                    [pbx_config]
                    4. Echo()                                     [pbx_config]
                    5. Playback(demo-echodone)                    [pbx_config]



*CLI> zap show channel 1
Channel: 1
File Descriptor: 25
Span: 1
Extension:
Dialing: no
Context: test-in
Caller ID string: "Channel 1" <6001>
Destroy: 0
InAlarm: 0
Signalling Type: FXS Kewlstart
Owner: <None>
Real: <None>
Callwait: <None>
Threeway: <None>
Confno: -1
Propagated Conference: -1
Real in conference: 0
DSP: no
Relax DTMF: no
Dialing/CallwaitCAS: 0/0
Default law: ulaw
Fax Handled: no
Pulse phone: no
Echo Cancellation: 0 taps unless TDM bridged, currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Actual Hookstate: Onhook