Hello everyone,

Till now we were working with asterisk to handle BLF.

But then we decided to move everything to kamailio and hence i started working on BLF with kamailio.

I have already configured kamailio for Call handling and presence information.

From different pages on Internet, I have found some information about configuration of kamailio+blf. And i did so, but somehow things are not working as they should.

I have done following changes to kamailio.cfg file

loadmodule "presence.so"
loadmodule "presence_xml.so"
loadmodule "presence_dialoginfo.so"
loadmodule "presence_mwi.so"
loadmodule "dialog.so"
loadmodule "pua.so"
loadmodule "pua_dialoginfo.so"

modparam("presence", "fallback2db", 1)
modparam("dialog", "dlg_flag", 4)
modparam("dialog", "db_url",
"mysql://xxxxxxxxx:xxxxxxxxxxxxxx@localhost/openser")
modparam("dialog", "db_mode", 1)
modparam("pua", "db_url",
"mysql://xxxxxxxxx:xxxxxxxxxxxxxx@localhost/openser")

Now when my phone(yealink VP530), sends subscribe request it looks as below:

SUBSCRIBE sip:1001@172.16.27.66 SIP/2.0
Via: SIP/2.0/UDP 172.16.27.61:5063;branch=z9hG4bK10464096
From: "1000" <sip:1000@172.16.27.66>;tag=393923564
To: <sip:1001@172.16.27.66>
Call-ID: 1572901975@172.16.27.61
CSeq: 1 SUBSCRIBE
Contact: <sip:1000@172.16.27.61:5063>
Accept: application/dialog-info+xml
Max-Forwards: 70
User-Agent: VP530P 23.70.0.40
Expires: 120
Event: dialog
Content-Length: 0

In response to this message, Kamailio returns 202 with following information

SIP/2.0 202 OK
Via: SIP/2.0/UDP 172.16.27.61:5063;branch=z9hG4bK245273058
From: "1000" <sip:1000@172.16.27.66>;tag=393923564
To: <sip:1001@172.16.27.66>;tag=a6a1c5f60faecf035a1ae5b6e96e979a-8ee2
Call-ID: 1572901975@172.16.27.61
CSeq: 2 SUBSCRIBE
Expires: 120
Contact: <sip:172.16.27.66:5060>
Server: kamailio (3.0.0 (i386/linux))
Content-Length: 0

Followed by a NOTIFY

NOTIFY sip:1000@172.16.27.61:5063 SIP/2.0
Via: SIP/2.0/UDP 172.16.27.66;branch=z9hG4bK3ccd.adfbc416.0
To: sip:1000@172.16.27.66;tag=2058189864
From: sip:1001@172.16.27.66;tag=a6a1c5f60faecf035a1ae5b6e96e979a-6cd8
CSeq: 1 NOTIFY
Call-ID: 2040123403@172.16.27.61
Content-Length: 0
User-Agent: kamailio (3.0.0 (i386/linux))
Max-Forwards: 70
Event: dialog
Contact: <sip:172.16.27.66:5060>
Subscription-State: active;expires=170

During subscribe message asked for XML based reply, yet NOTIFY doesnt send any XML. and hence there is no impact of this message on device. Nothing is changed.Also there's nothing when i call from this device to another, ideally i should get some NOTIFY messages

So, i think i am doing something wrong in Configuration.

Can anyone please help me in it. If you need any other info, i'll provide you.

--
Regards,

Hemanshu Patel

Senior Software Engg

PHelp the environment – please don't print this email unless you really need to!