#This section will vary depending on your configuration.
#We do suggest setting the variable min-se which controls session timeout to 900 seconds. 

voice rtp send-recv

voice service voip
!

  allow-connections sip to sip
  sip

    min-se 900
!

voice class codec 711
 codec preference 1 g711ulaw

 codec preference 2 g711alaw
!
voice class codec 729
 codec preference 1 g729r8 bytes 40
 codec preference 2 g729br8 bytes 40
!
voice class codec 700
 codec preference 1 g711ulaw
 codec preference 2 g711alaw
 codec preference 3 g729r8 bytes 40
 codec preference 4 g729br8 bytes 40
!

! We support E164 format only. US/CA numbers have to be dialed in full 11 digit format.
! Use this template if you wish to convert from 7 or 10 to 11 digits. 
! Replace NPA with your local area code when using 7 digit numbers
!
! translation rule definition below
!

voice translation-rule 1
  rule 1 /^9\(1[2-9]..[2-9]......\)$/ /\1/     ! send out if using 9 dial-out prefix and 11 digit format ; strip 9 
  rule 2 /^9\([2-9]......\)$/ /1NPA\1/         ! send out if using 9 dial-out prefix and 10 digit format ; strip 9 and 1 country code
  rule 3 /^\(.......\)$/ /1NPA\1/              ! 7 digit format, add 1 and the "NPA" and send out (don't forget to replace NPA with your local prefix)
  rule 4 /^011\(.*)$/ /1\1/                    ! strip 011, send call out
  rule 5 /^00\(.*)$/ /1\1/                     ! strip 00 , send call out

!
! translation profile using the translation rules above

!

voice translation-profile multitel
translate called 1
!
! Outbound dial-peer definition
!

dial-peer voice 1 voip
 permission term     
 description Termination towards MultiTEL
 translation-profile outgoing multitel
 destination-pattern .T  ! or replace with 1[2-9]..[2-9]......T if only sending US calls
 session protocol sipv2
 session target dns:sbc-us.multitel.net  ! -- replace here with the SBC which is closest to you

 session transport udp  ! or "tcp", depending how your account is configured on MultiTEL
 voice-class codec 711
 dtmf-relay rtp-nte
 no vad
!
! Inbound dial-peer definition
!
dial-peer voice 2 voip
  permission orig
  description Origination from MultiTEL
  huntstop     
  session transport udp  ! or "tcp", depending how your account is configured on MultiTEL
  incoming called-number .T
  dtmf-relay rtp-nte
  voice-class codec 711
  fax-relay ecm disable
  fax-rate 9600
  fax protocol t38 ls-redundancy 1 hs-redundancy 1 fallback pass-through g711ulaw
  no vad
!

!

! IMPORTANT: please make sure you DO HAVE the below config for security purposes
! this will allow calls to your gateway only from authorized IP addresses
voice source-group myawesomecompany
  access-list 99
  disconnect-cause call-reject
  ! add here inbound translation profile if you need to
!
! access-list definition - list here your IP addresses
! default action is deny 
! 
access-list 99 permit 192.168.1.0 0.0.0.255
! You may have to add MultiTEL's origination IP addresses here to allow inbound DID/origination calls from MultiTEL
! Please consult the article below for complete (and usually up to date) list of IP addresses we use to send DID/origination calls
! https://multitel.net/docs/view/161/knowledgebase/
! Sample entries below:
access-list 99 permit X.Y.Z.0 0.0.0.255
access-list 99 permit A.B.C.0 0.0.0.255