Below is a sample config that will set up all 4 lines to ring the auto attendant at "100" and all outbound calls to use ports on reverse order (inbound ports 0/1/2/3 and outbound 3/2/1/0).
#----------------------------------------------------------------# # # # SN4524/JO/EUI # # R6.1 2010-07-15 H323 SIP FXO # # 1970-07-02T18:35:24 # # SN/00A0BA0505AA # # Generated configuration file # # # #----------------------------------------------------------------# cli version 3.20 clock local default-offset -04:00 dns-client server 192.168.54.2 webserver port 80 language en sntp-client server 192.5.41.40 system hostname sip-gw.voice.mydomain.loc system ic voice 0 low-bitrate-codec g729 profile ppp default profile call-progress-tone US_Dialtone play 1 1000 350 -13 440 -13 profile call-progress-tone US_Alertingtone play 1 2000 440 -19 480 -19 pause 2 4000 profile call-progress-tone US_Busytone play 1 500 480 -24 620 -24 pause 2 500 profile tone-set default profile tone-set US map call-progress-tone dial-tone US_Dialtone map call-progress-tone ringback-tone US_Alertingtone map call-progress-tone busy-tone US_Busytone map call-progress-tone release-tone US_Busytone map call-progress-tone congestion-tone US_Busytone profile voip default codec 1 g711alaw64k rx-length 20 tx-length 20 codec 2 g711ulaw64k rx-length 20 tx-length 20 profile pstn default profile sip default no autonomous-transitioning profile aaa default method 1 local method 2 none context ip router interface LAN ipaddress 192.168.54.3 255.255.255.0 tcp adjust-mss rx mtu tcp adjust-mss tx mtu context ip router route 0.0.0.0 0.0.0.0 192.168.54.1 context cs switch digit-collection timeout 3 routing-table called-e164 SIP_TO_ISDN route default dest-service OUTBOUND interface sip IF_SIPX bind context sip-gateway GW-SIP route call dest-table SIP_TO_ISDN remote pbx.voice.mydomain.loc address-translation outgoing-call to-header user-part fix 100 host-part fix pbx.voice.mydomain.loc interface fxo IF_FXO0 route call dest-interface IF_SIPX disconnect-signal loop-break disconnect-signal busy-tone ring-number on-caller-id dial-after timeout 2 mute-dialing use profile tone-set US interface fxo IF_FXO1 route call dest-interface IF_SIPX disconnect-signal loop-break disconnect-signal busy-tone ring-number on-caller-id dial-after timeout 2 mute-dialing use profile tone-set US interface fxo IF_FXO2 route call dest-interface IF_SIPX disconnect-signal loop-break disconnect-signal busy-tone ring-number on-caller-id dial-after timeout 2 mute-dialing use profile tone-set US interface fxo IF_FXO3 route call dest-interface IF_SIPX disconnect-signal loop-break disconnect-signal busy-tone ring-number on-caller-id dial-after timeout 2 mute-dialing use profile tone-set US service hunt-group OUTBOUND drop-cause normal-unspecified drop-cause no-circuit-channel-available drop-cause network-out-of-order drop-cause temporary-failure drop-cause switching-equipment-congestion drop-cause access-info-discarded drop-cause circuit-channel-not-available drop-cause resources-unavailable drop-cause user-busy #route call 1 dest-interface IF_FXO3 #route call 2 dest-interface IF_FXO2 #route call 3 dest-interface IF_FXO1 route call 3 dest-interface IF_FXO0 context cs switch no shutdown location-service SIPX_SERVER domain 1 sipx.voice.mydomain.loc context sip-gateway GW-SIP interface IF_SIPX bind interface LAN context router port 5060 context sip-gateway GW-SIP bind location-service SIPX_SERVER no shutdown port ethernet 0 0 medium auto encapsulation ip bind interface LAN router no shutdown port ethernet 0 1 medium 10 half shutdown port fxo 0 0 flash-hook-duration 50 use profile fxo us caller-id format bell encapsulation cc-fxo bind interface IF_FXO0 switch no shutdown port fxo 0 1 flash-hook-duration 50 use profile fxo us caller-id format bell encapsulation cc-fxo bind interface IF_FXO1 switch no shutdown port fxo 0 2 flash-hook-duration 50 use profile fxo us caller-id format bell encapsulation cc-fxo bind interface IF_FXO2 switch no shutdown port fxo 0 3 flash-hook-duration 50 use profile fxo us caller-id format bell encapsulation cc-fxo bind interface IF_FXO3 switch no shutdown