I am having problems with SIP trunks and outbound call from one specific shared line. when in SRST, if I dial any number from this shared line (0100) I get fast busy!!! Below is fallback mode configuration. Do you see anything wrong with this? Having same number 0100 as call-forward busy can create any issues?
call-manager-fallback
secondary-dialtone 9
max-conferences 8 gain -6
transfer-system full-consult
limit-dn 79xx 2
limit-dn 79xx 2
limit-dn 79xx 2
limit-dn 79xx 2
ip source-address 192.168.XXX.XXX port 2000
max-ephones 75
max-dn 75
system message primary Fallback Mode
no huntstop
pickup 0100
call-forward busy 0100
time-zone 10
time-format 24
date-format dd-mm-yy
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