Remote BLF's using PJSIP

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

Open

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

Open

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:FreePBX@10.39.96.5 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:PBXact@10.39.96.4:5061 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

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