[Asterisk-Users] How to assign channels for asterisk

[bixbite at tom.com]

  helleo ,I have one wildcard installed on the server,and configured it.there are  
 two modules which both FXOs .all configurations complete,and when we start asterisk use "asterisk -vvvvc",it shows asterisk ready,no warnings.afterwards when the sever connected to the PSTN in the one port which configured,and have a  phone line connected to the other port then run "zttool",however it shows just one channel active.I can't understand ,why? I try to dial the PSTN number from another external phone to test,but the call is not ringing.But in the asterisk cLI there  are some infos following as :
    -- Starting simple switch on 'Zap/4-1'
    -- Executing Dial("Zap/4-1", "Zap/g1") in new stack
those are my configurations:
 -extension.conf--
[incoming]
exten => s,1,Answer()
exten => s,2,Echo()
 -zapata.conf--
context=incoming
signalling=fxs_ks
channel => 3-4
  -zaptel.conf
context=incoming
signalling=fxs_ks
channel => 3-4
 hope to hear from you
thanks & regards

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