*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)