Problems with outbound calls

I have asterisk setup on FC4 with a TDM11B. I recieve incoming calls just fine, the problem is with outbound calls. I can periodically make outbound calls, but most of the time all I get is dead noise and eventually the recording “if you would like to make a call…”. Any ideas

most attempts to dial out act as if the phone has been left “off hook”. dead line then the “your call did not go through” message.

outbound call works when i start up asterisk, but any attempt thereafter is unsuccessful.

here is more info…

zaptel.conf:

loadzone = us
defaultzone = us

fxoks=1
fxsks=4

zpata.conf:

[channels]
swithctype=national
signalling=fxo_ls
rxwink=300
usecallerid=yes
hidecallerid=no
callwaiting=yes
usecalingpres=yes
callwaitingcallerid=yes
threewaycaling=yes
transfer=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=0.0
txgain=0.0
group=1
callgroup=1
pickupgroup=1
immediate=no

echotraining=400
callerid="Test Phone"
signalling=fxo_ks
context=default
channel=>1

signalling=fxs_ks
callerid=asreceived
context=incoming
channel=>4

any ideas???