*CLI>     -- Accepting unauthenticated call from 10.0.1.1, requested format = 4, actual format = 4
    -- Executing Dial("IAX2/mexicodf@culiacan/1", "Zap/1/17|60|Ttr") in new stack
Oct 19 12:09:36 NOTICE[15375]: app_dial.c:743 dial_exec: Unable to create channel of type 'Zap'
  == Everyone is busy/congested at this time
    -- Hungup 'IAX2/mexicodf@culiacan/1'

 [chan_zap.so] => (Zapata Telephony)
  == Parsing '/etc/asterisk/zapata.conf': Found
    -- Registered channel 1, FXS Kewlstart signalling
    -- Automatically generated pseudo channel
  == Registered channel type 'Zap' (Zapata Telephony Driver)
  == Registered channel type 'Tor' (Zapata Telephony Driver)
  == Registered application 'CallingPres'
  == Manager registered action ZapTransfer
  == Manager registered action ZapHangup
  == Manager registered action ZapDialOffhook
  == Manager registered action ZapDNDon
  == Manager registered action ZapDNDoff
  == Manager registered action ZapShowChannels

zapata.conf
context=default
signalling=fxs_ks
group = 1
channel=1

extensions.conf
[default]
exten => 105110,1,Dial(Zap/g1/17,60,Ttr)

 *CLI> zap show channel 1
Channel: 1
File Descriptor: 12
Span: 1
Extension:
Dialing: no
Context: default
Caller ID string:
Destroy: 0
InAlarm: 1
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: 128 taps, currently OFF
Actual Confinfo: Num/0, Mode/0x0000
Actual Confmute: No
Actual Hookstate: Onhook