Trunk

A Trunk is a link to another system, such as a phone carrier, pbx, etc, to send and receive calls. A Trunk will need a Trunk Handler defined beforehand to function properly. 

Adding a Trunk

1) Enter the CLI's configuration mode

2) Ensure you have already made a Trunk Handler, while you can create a Trunk without defining one, you will still need to define one to ensure that the phone system is properly configured.

3) Enter the name of the Trunk you wish to create. You will be prompted with the minimum required settings

vbox-markm(config)# trunk building_a
!! Notice: Editing new item: building_a
!! Notice: Minimum requirements needed for insert:
!!   device_type
!!   desc
!!   capacity
vbox-markm(config-trunk building_a)#

4) Enter the minimum required settings for adding the Trunk, you can use the "?" key to get a description of all the available settings.

vbox-markm(config-trunk building_a)# capacity 50
vbox-markm(config-trunk building_a)# desc "Main building"
vbox-markm(config-trunk building_a)# device_type
SIP         IAX2        DAHDI       VIRTUAL     SIP-VIRTUAL       ### Used tab to get a list of the available devices. 
vbox-markm(config-trunk building_a)# device_type SIP

5) After adding the trunk, use the show command to ensure your settings have been saved. 

vbox-markm(config-trunk building_a)# show
! Generating running-config
!!!!
 
! -------------- Trunks ----------------
trunk building_a
  capacity 50
  desc "Main building"
  device_type SIP
  prestart_media no
  record no
  trunk_handler_name default
  sip
    allow ulaw,alaw,adpcm,gsm
    call-limit 50
    canreinvite no
    disallow g723,slin,ilbc,lpc10,g729,speex,g726aal2,g722
    host dynamic
    nat yes
    qualify yes
    rtpholdtimeout 60
    rtptimeout 60
    secret 9a97c729fdce1f0a5d68495f82c5159e
    sendrpid yes
    trustrpid no
    username building_a
    exit
  exit
 
exit
 
vbox-markm(config-trunk building_a)#

6) Next define a Trunk Handler that the Trunk will use.

7) Lastly, do a show command to ensure your settings are saved.

vbox-markm(config-trunk building_a)# show
! Generating running-config
!!!!
 
! -------------- Trunks ----------------
trunk building_a
  capacity 50
  desc "Main building"
  device_type SIP
  prestart_media no
  record no
  trunk_handler_name Nathans_Test_TrunkHandler
  sip
    allow ulaw,alaw,adpcm,gsm
    call-limit 50
    canreinvite no
    disallow g723,slin,ilbc,lpc10,g729,speex,g726aal2,g722
    host dynamic
    nat yes
    qualify yes
    rtpholdtimeout 60
    rtptimeout 60
    secret 9a97c729fdce1f0a5d68495f82c5159e
    sendrpid yes
    trustrpid no
    username building_a
    exit
  exit
 
exit
 
vbox-markm(config-trunk building_a)#

Trunk Settings Description

You can also use the "?" key to view the description while in the CLI.  * indicates a required setting.