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SIP-T27G no Refresh Display BLF Monitoring When Receiving subsequence Notify
Author Message
cleviton Offline
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Posts: 2
Joined: Oct 2018
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Post: #1
SIP-T27G no Refresh Display BLF Monitoring When Receiving subsequence Notify
The Yealink IP Phone SIP-T27G does not refresh the Device Display when receiving most recently NOTIFY messages, on BLF feature.

Following show packet capture:

NOTIFY sip:5991@phoneipaddr:5060 SIP/2.0 <------ First Notify received
v: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK3ceecd02
Max-Forwards: 70
f: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
t: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
m: <sip:202@asteriskserveripaddr:5060>
i: 0_472292147@phoneipaddr
CSeq: 103 NOTIFY
User-Agent: Asterisk PBX
Subscription-State: active
o: dialog
c: application/dialog-info+xml
l: 558

<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1" state="full" entity="sip:202@asteriskserveripaddr">
<dialog id="202" call-id="pickup-0_472292147@phoneipaddr" local-tag="190612704" remote-tag="as75cd87a9" direction="recipient">
<remote>
<identity display="202">sip:202@asteriskserveripaddr</identity>
<target uri="sip:202@asteriskserveripaddr"/>
</remote>
<local>
<identity display="202">sip:202@asteriskserveripaddr</identity>
<target uri="sip:202@asteriskserveripaddr"/>
</local>
<state>early</state>
</dialog>
</dialog-info>


SIP/2.0 200 OK
Via: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK3ceecd02
From: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
To: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
Call-ID: 0_472292147@phoneipaddr
CSeq: 103 NOTIFY
Contact: <sip:5991@phoneipaddr:5060>
User-Agent: Yealink SIP-T27G 69.84.0.10
Content-Length: 0


NOTIFY sip:5991@phoneipaddr:5060 SIP/2.0 <------ Second Notify received refresh one previous
v: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK7cd1503c
Max-Forwards: 70
f: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
t: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
m: <sip:202@asteriskserveripaddr:5060>
i: 0_472292147@phoneipaddr
CSeq: 104 NOTIFY
User-Agent: Asterisk PBX
Subscription-State: active
o: dialog
c: application/dialog-info+xml
l: 572

<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="2" state="full" entity="sip:202@asteriskserveripaddr">
<dialog id="202" call-id="pickup-0_472292147@phoneipaddr" local-tag="190612704" remote-tag="as75cd87a9" direction="recipient">
<remote>
<identity display="User Name Extern">sip:22225555@asteriskserveripaddr</identity>
<target uri="sip:22225555@asteriskserveripaddr"/>
</remote>
<local>
<identity display="User Name 1">sip:5988@asteriskserveripaddr</identity>
<target uri="sip:5988@asteriskserveripaddr"/>
</local>
<state>early</state>
</dialog>
</dialog-info>

Code:
[b]<----  In this point, when receiving, a IPhone1's visual screen on outhers devices of
<----  monitoring group must display visual screen 5988 <- 22225555, but it is not occur,
<----  but instead take place 202 <- 22225555[/b]

SIP/2.0 200 OK
Via: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK7cd1503c
From: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
To: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
Call-ID: 0_472292147@phoneipaddr
CSeq: 104 NOTIFY
Contact: <sip:5991@phoneipaddr:5060>
User-Agent: Yealink SIP-T27G 69.84.0.10
Content-Length: 0


NOTIFY sip:5991@phoneipaddr:5060 SIP/2.0 <------ last Notify received refresh state=terminated
v: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK4ece7870
Max-Forwards: 70
f: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
t: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
m: <sip:202@asteriskserveripaddr:5060>
i: 0_472292147@phoneipaddr
CSeq: 105 NOTIFY
User-Agent: Asterisk PBX
Subscription-State: active
o: dialog
c: application/dialog-info+xml
l: 210

<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="3" state="full" entity="sip:202@asteriskserveripaddr">
<dialog id="202">
<state>terminated</state>
</dialog>
</dialog-info>


SIP/2.0 200 OK
Via: SIP/2.0/UDP asteriskserveripaddr:5060;branch=z9hG4bK4ece7870
From: <sip:202@asteriskserveripaddr>;tag=as75cd87a9
To: "User Name 2" <sip:5991@asteriskserveripaddr:5060>;tag=190612704
Call-ID: 0_472292147@phoneipaddr
CSeq: 105 NOTIFY
Contact: <sip:5991@phoneipaddr:5060>
User-Agent: Yealink SIP-T27G 69.84.0.10
Content-Length: 0



Yealink's software engineering should correct this behavior, so that the device displays the correct group user information, as soon as possible.
10-31-2018 09:09 PM
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SIP-T27G no Refresh Display BLF Monitoring When Receiving subsequence Notify - cleviton - 10-31-2018 09:09 PM

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