[SR-Users] BLFs are not working

[Jerry Kendall]

Thanks Daniel,


Now it seems almost done.... I have 6 Grandstream phones connected and 
they all have 4-6 BLFs watching each other.

(I also have Yealink/Cisco/SNOM/Polycom phones to test later - one thing 
at a time.....)

The 2x GRP2604P all look great

The GXP2130 seems OK as well

The GXP2170 with side car seems OK

But, the 2x GXP1782 are not quit working yet.


A couple of the BLFs are OK but most are sending back 481 Subscription 
Does Not Exist... See blow (gotta love sngrep)

--------------------------------

2021/10/01 12:31:13.024698 SITE_IP:44762 -> PUBLIC_IP:8081
SUBSCRIBE sip:301 at domain.net:8081 SIP/2.0
Via: SIP/2.0/UDP PRIVATE_IP:44762;branch=z9hG4bK806864449;rport
From: <sip:305 at domain.net:8081>;tag=1883014019
To: <sip:301 at domain.net:8081>
Call-ID: 551473572-44762-6 at BA.CEG.HG.GC
CSeq: 27840 SUBSCRIBE
Contact: <sip:305 at PRIVATE_IP:44762>
X-Grandstream-PBX: true
Max-Forwards: 70
User-Agent: Grandstream GXP1782 1.0.1.116
Expires: 60
Supported: replaces, path, timer, eventlist
Event: dialog
Accept: application/dialog-info+xml,multipart/related,application/rlmi+xml
Accept-Encoding: zlib+base64
Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
Content-Length: 0

2021/10/01 12:31:13.026561 PUBLIC_IP:8081 -> SITE_IP:44762
SIP/2.0 202 OK
Via: SIP/2.0/UDP 
PRIVATE_IP:44762;branch=z9hG4bK806864449;rport=44762;received=SITE_IP
From: <sip:305 at domain.net:8081>;tag=1883014019
To: <sip:301 at domain.net:8081>;tag=5e1ee053cf7168b9d3ee9c05740f837c-eb6836a8
Call-ID: 551473572-44762-6 at BA.CEG.HG.GC
CSeq: 27840 SUBSCRIBE
Expires: 60
Contact: <sip:PUBLIC_IP:8081>
Server: kamailio (5.4.4 (x86_64/linux))
Content-Length: 0

2021/10/01 12:31:13.027436 PUBLIC_IP:8081 -> SITE_IP:44762
NOTIFY sip:305 at PRIVATE_IP:44762 SIP/2.0
Via: SIP/2.0/UDP 
PUBLIC_IP:8081;branch=z9hG4bK2ba8.555213e5000000000000000000000000.0
To: <sip:305 at domain.net>;tag=1883014019
From: <sip:301 at domain.net>;tag=5e1ee053cf7168b9d3ee9c05740f837c-eb6836a8
CSeq: 2 NOTIFY
Call-ID: 551473572-44762-6 at BA.CEG.HG.GC
Content-Length: 273
User-Agent: kamailio (5.4.4 (x86_64/linux))
Max-Forwards: 70
Event: dialog
Contact: <sip:PUBLIC_IP:8081>
Subscription-State: active;expires=60
Content-Type: application/dialog-info+xml

<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1" 
state="full" entity="sip:301 at domain.net">
   <dialog id="615293b33c62dec073e05d9421e9f48b" direction="recipient"> 
<state>terminated</state> </dialog>
</dialog-info>

2021/10/01 12:31:13.332763 SITE_IP:44762 -> PUBLIC_IP:8081
SIP/2.0 481 Subscription Does Not Exist
Via: SIP/2.0/UDP 
PUBLIC_IP:8081;branch=z9hG4bK2ba8.555213e5000000000000000000000000.0
From: <sip:301 at domain.net>;tag=5e1ee053cf7168b9d3ee9c05740f837c-eb6836a8
To: <sip:305 at domain.net>;tag=1883014019
Call-ID: 551473572-44762-6 at BA.CEG.HG.GC
CSeq: 2 NOTIFY
Supported: replaces, path, timer
User-Agent: Grandstream GXP1782 1.0.1.116
Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO, 
REFER, UPDATE, MESSAGE
Content-Length: 0
--------------------------------


Now, I am sure it's not likely the phone setup as I have a FreeSWITCH 
system that these 6 phones normally talk to.

All i do is change the DNS A Record between the IP of the Kamailio 
server and the FreeSWITCH server... This way I don't touch the phone 
configs..

I just change the A Records and take an hour long break...


On the FreeSWITCH server, the phones do exactly as expected...

I am trying to stick the Kamailio server between the phones and FS but, 
one step at a time.

So, any thoughts as to why the GXP1782 BLFs are not accepting the NOTIFY 
messages?


Jerry