Yealink SIP-T23G [438/841] Visual alert and audio alert for blf pickup

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones

422

Max-Forwards: 70

User-Agent: Yealink SIP-T23G 44.80.0.20

Expires: 30

Event: dialog

Content-Length: 0

Example of a NOTIFY message (<state>confirmed</state> shows the call has been

established):

NOTIFY sip:1010@10.3.20.1:5060 SIP/2.0

Via: SIP/2.0/UDP 10.3.20.2:5060;branch=z9hG4bK276311022

From: <sip:1011@10.3.5.199:5060>;tag=3436332841

To: "1010" <sip:1010@10.3.5.199:5060>;tag=3098567568

Call-ID: 0_4117916748@10.3.20.1

CSeq: 4 NOTIFY

Contact: <sip:1011@10.3.20.2:5060>

Content-Type: application/dialog-info+xml

Max-Forwards: 70

User-Agent: Yealink SIP-T27P 45.80.0.20

Subscription-State: active;expires=17

Event: dialog

Content-Length: 534

<?xml version="1.0"?>

<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="3" state="partial"

entity="sip:1011@10.3.5.199:5060">

<dialog id="74" call-id="0_2561109579@10.3.20.1" local-tag="2778958897" remote-tag="1132018898"

direction="recipient">

<state>confirmed</state>

<local>

</local>

</remote>

</dialog>

</dialog-info>

Visual Alert and Audio Alert for BLF Pickup

Visual and audio alert for BLF pickup allow the supervisor’s phone to play an alert tone

and display a visual prompt (e.g., “6001<-6002”, 6001 is the monitored extension which

receives an incoming call from 6002) when the monitored user receives an incoming call.

In addition to the BLF key, visual alert for BLF pickup feature enables the supervisor to