Dual Trunk Routing

Solution Integration > PBXs > BT Call Server > Example Configurations > Route Configuration


		The examples provided below are meant as a guide only. They should be customized for individual needs.

Example 1

Web UI > Configuration > Trunks

; Trunk template

[trunk-defaults](!)

type = wizard

transport = transport-tcp ; Explicit transport configuration to use

endpoint/allow = !all,ulaw,alaw ; Media Codec(s) to allow

endpoint/context = incoming ; Dialplan context to use

endpoint/dtmf_mode = auto ; DTMF is sent as RFC 4733 if the other side supports it or as INBAND if not

endpoint/direct_media = yes ; Enable direct media (peer to peer RTP)

;endpoint/tos_audio = ef ; Sets TOS for audio streams (QoS)

;endpoint/cos_audio = 5 ; Sets COS for audio streams (QoS)

aor/qualify_frequency = 30 ; Interval at which to qualify an AoR (SIP Options Ping)

; Trunk to CUCM (dual nodes)

[CUCM](trunk-defaults)

remote_hosts = IP_address_PBX_Pub:5060,IP_address_PBX_Sub:5060 ; Comma separated IP's (with port) of PBX Pub and Sub

identify/match = IP_address_PBX_Pub,IP_address_PBX_Sub ; Comma separated IP's of PBX Pub and Sub

; Trunk to TWILIO

; Trunk template definition

[twilio-trunk-defaults](!)

type = wizard

endpoint/context = incoming

endpoint/transport=transport-udp

endpoint/allow = !all,ulaw,alaw

endpoint/direct_media=no

endpoint/rewrite_contact=yes

endpoint/rtp_symmetric=yes

endpoint/dtmf_mode=rfc4733

endpoint/allow_subscribe = no

aor/qualify_frequency = 60

; Trunk definition

[TWILIO](twilio-trunk-defaults)

remote_hosts = xxxxxx.pstn.twilio.com, yyyyyy.pstn.dublin.twilio.com

;sends_auth = yes

;outbound_auth/username = username

;outbound_auth/password = password

Web UI > Configuration > Route (Dial Plan)

; Context for incoming calls

[incoming]

exten => _X.,1,Dial(PJSIP/${EXTEN},300) ; Call the internal extension

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

; Exact duplicate of above, but note the "+" in "exten => _+X." which caters for +(Plus) dialing, e.g. +44xxxxxxxxxx

; Require both if using + dialing

exten => _+X.,1,Dial(PJSIP/${EXTEN},300) ; Call the internal extension

exten => _+X.,n,Congestion(10) ; Play congestion tone if line is unavailable

; Context for outgoing calls

[outbound]

exten => _X.,1,GotoIf($[${DEVICE_STATE(PJSIP/${EXTEN})} != INVALID]?local:dialcheck) ; Check if dialed number is locally registered, if not route to "dialcheck"

exten => _X.,n(local),Dial(PJSIP/${EXTEN},300) ; Call local extension if number registered

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _X.,n(dialcheck),GotoIf($["${EXTEN:0:3}"="555"]?cucm:twilio) ; Check if the first three digits are "555" if true go to "cucm" if not go to "twilio"

exten => _X.,n(cucm),Dial(PJSIP/${EXTEN}@CUCM,300) ; Dial through the trunk

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _X.,n(twilio),GotoIf($["${EXTEN:0:3}"="777"]?match:nomatch) ; Check if the first three digits are "777" if true go to "match" if not go to "nomatch"

exten => _X.,n(match),Dial(PJSIP/${EXTEN}@TWILIO,300) ; Dial through the "TWILIO" trunk

exten => _X.,n(nomatch),Congestion(10) ; Play congestion tone if line is unavailable

; Duplicate of above (with minor tweaks), but note the "+" in "exten => _+X." which caters for +(Plus) dialing, e.g. +44xxxxxxxxxx

; Require both if using + dialing

; Note the digit checks being done which look for +555 and +777, amend as needed

exten => _+X.,1,GotoIf($[${DEVICE_STATE(PJSIP/${EXTEN})} != INVALID]?local:dialcheck) ; Check if dialed number is locally registered, if not route to "dialcheck"

exten => _+X.,n(local),Dial(PJSIP/${EXTEN},300) ; Call local extension if number registered

exten => _+X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _+X.,n(dialcheck),GotoIf($["${EXTEN:0:4}"="+555"]?cucm:twilio) ; Check if the first four digits are "+555" if true go to "cucm" if not go to "twilio"

exten => _+X.,n(cucm),Dial(PJSIP/${EXTEN}@CUCM,300) ; Dial through the trunk

exten => _+X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _+X.,n(twilio),GotoIf($["${EXTEN:0:4}"="+777"]?match:nomatch) ; Check if the first four digits are "+777" if true go to "match" if not go to "nomatch"

exten => _+X.,n(match),Dial(PJSIP/${EXTEN}@TWILIO,300) ; Dial through the "TWILIO" trunk

exten => _+X.,n(nomatch),Congestion(10) ; Play congestion tone if line is unavailable

Example 2

Web UI > Configuration > Trunks

; Trunk template

[trunk-defaults](!)

type = wizard

transport = transport-tcp ; Explicit transport configuration to use

endpoint/allow = !all,ulaw,alaw ; Media Codec(s) to allow

endpoint/context = incoming ; Dialplan context to use

endpoint/dtmf_mode = auto ; DTMF is sent as RFC 4733 if the other side supports it or as INBAND if not

endpoint/direct_media = yes ; Enable direct media (peer to peer RTP)

;endpoint/tos_audio = ef ; Sets TOS for audio streams (QoS)

;endpoint/cos_audio = 5 ; Sets COS for audio streams (QoS)

aor/qualify_frequency = 30 ; Interval at which to qualify an AoR (SIP Options Ping)

;-----

[TRUNK1](trunk-defaults)

remote_hosts = IP_address_PBX:5060 ; IP of PBX

identify/match = IP_address_PBX ; IP of PBX

;-----

[TRUNK2](trunk-defaults)

remote_hosts = IP_address_PBX:5060 ; IP of PBX

identify/match = IP_address_PBX ; IP of PBX

Web UI > Configuration > Route (Dial Plan)

; Context for incoming calls

[incoming]

exten => _X.,1,Dial(PJSIP/${EXTEN},300) ; Call the internal extension

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

; Exact duplicate of above, but note the "+" in "exten => _+X." which caters for +(Plus) dialing, e.g. +44xxxxxxxxxx

; Require both if using + dialing

exten => _+X.,1,Dial(PJSIP/${EXTEN},300) ; Call the internal extension

exten => _+X.,n,Congestion(10) ; Play congestion tone if line is unavailable

; Context for outgoing calls

[outbound]

exten => _X.,1,GotoIf($[${DEVICE_STATE(PJSIP/${EXTEN})} != INVALID]?10:15) ; Check dialed number locally registered, else route to trunk

exten => _X.,10,Dial(PJSIP/${EXTEN},300) ; Call local extension if number registered

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _X.,15,ChanIsAvail(PJSIP/TRUNK1&PJSIP/TRUNK2) ; Check which trunk is available

exten => _X.,n,Set(AVAILCHAN=${CUT(PASSTHRU(${CUT(AVAILCHAN,-,1)}),/,2)}) ; Remove unwanted info from the response string

exten => _X.,n,Dial(PJSIP/${EXTEN}@${AVAILCHAN},300) ; Dial through the available trunk

exten => _X.,n,Congestion(10) ; Play congestion tone if line is unavailable

; Exact duplicate of above, but note the "+" in "exten => _+X." which caters for +(Plus) dialing, e.g. +44xxxxxxxxxx

; Require both if using + dialing

exten => _+X.,1,GotoIf($[${DEVICE_STATE(PJSIP/${EXTEN})} != INVALID]?10:15) ; Check dialed number locally registered, else route to trunk

exten => _+X.,10,Dial(PJSIP/${EXTEN},300) ; Call local extension if number registered

exten => _+X.,n,Congestion(10) ; Play congestion tone if line is unavailable

exten => _+X.,15,ChanIsAvail(PJSIP/TRUNK1&PJSIP/TRUNK2) ; Check which trunk is available

exten => _+X.,n,Set(AVAILCHAN=${CUT(PASSTHRU(${CUT(AVAILCHAN,-,1)}),/,2)}) ; Remove unwanted info from the response string

exten => _+X.,n,Dial(PJSIP/${EXTEN}@${AVAILCHAN},300) ; Dial through the available trunk