i need your help expert people of asterisk, I need to be able to make/receive external calls, I dont know what more to do, I cant do that 
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This is the zaptel. conf
fxoks=1-2
fxsks=3-4
and the zapata.conf shows that:
signalling=fxo_ks
echocancel=yes
callerid=asreceived
group=1
context=from-internal
channel => 1-2
signalling=fxs_ks
group=2
context=from-pstn
channel=> 3-4
please send me an example to make/receive a call and I’ll here adapt it to a phone number, another question, with the configuration of two .conf above, the line phones must be in position 1 and 2 and the phones in 3 and 4 in the card?, I’ll appreciate your help…