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This page will outline how to setup remote phone BLF's  using PJSIP between two PBX's which will monitor the device state of remote phones.


Asterisk Background

Publishing Extension States

Exchanging Device State PJSIP


Environment

Set BLF's on Phones

BLF Alerts



Create a context=from-internal trunk on each PBX to route calls and to send the PUBLISH for device-states



                                                 FreePBX                                                                                                                                        PBXact


    


FreePBX Config

  1. Edit the pjsip.endpoint_custom.conf by adding the following data

    [PBXact]
    type=endpoint
    
    [PBXact-devicestate]
    type=outbound-publish
    server_uri=sip:[email protected]
    event=asterisk-devicestate
    @body=application/dialog-info+xml
    @context=^users
    
    [PBXact]
    type=asterisk-publication
    devicestate_publish=PBXact-devicestate
    mailboxstate_publish=PBXact-mwi
    device_state=yes
    mailbox_state=yes
    @body=application/dialog-info+xml
    @context=^users
    
    
    [PBXact]
    type=inbound-publication
    event_asterisk-devicestate=PBXact
    event_asterisk-mwi=PBXact
  2. Edit the extensions_custom.conf

    [from-internal-custom]
    exten => _[47]xxx,hint,PJSIP/${EXTEN}&PJSIP/90${EXTEN}&PJSIP/99${EXTEN}&Custom:DND${EXTEN},CustomPresence:${EXTEN}                 ; *** note that the dialplan is looking for extensions in the range of 4xxx or 7xxx

PBXAct Config

  1. Edit the pjsip.endpoint_custom.conf by adding the following data

    [FreePBX]
    type=endpoint
    
    [FreePBX-devicestate]
    type=outbound-publish
    server_uri=sip:[email protected]:5061
    event=asterisk-devicestate
    @body=application/dialog-info+xml
    @context=^users
    
    [FreePBX]
    type=asterisk-publication
    devicestate_publish=FreePBX-devicestate
    mailboxstate_publish=FreePBX-mwi
    device_state=yes
    mailbox_state=yes
    @body=application/dialog-info+xml
    @context=^users
    
    [FreePBX]
    type=inbound-publication
    event_asterisk-devicestate=FreePBX
    event_asterisk-mwi=FreePBX



  2. Edit the extensions_custom.conf

    [from-internal-custom]
    exten => _[123]xxx,hint,PJSIP/${EXTEN}&&PJSIP/90${EXTEN}&PJSIP/99${EXTEN}&Custom:DND${EXTEN},CustomPresence:${EXTEN}               ; *****note that the dialplan is looking for extensions in the range of 1xxx, 2xxx or 3xxx

To show hints from each PBX respectively you may enter the following

  1. From the PBX CLI from the FreePBX: asterisk -rx 'core show hints'|grep -i (ext)


    As you can see, FreePBX instance is watching extensions 7200 and 4100 from PBXact
    When the user is on a call, BLF will change as well as the hint

  2. DND can also be monitored as well

           

           





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  1. All support comments left here will be deleted. Please follow up to the FreePBX forum for assistance with implementation.

    https://community.freepbx.org/