Yealink SIP-T2 SERIES Administrator's Manual page 504

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Details of the Configuration Parameter:
phone_setting.ringing_timeout
Description:
Configures the duration time (in seconds) in the ringing state.
If it is set to 180, the phone will stop ringing if the call is not answered within 180
seconds.
Web User Interface:
None
Phone User Interface:
None
When placing a call, the IP phone will send an INVITE request to the proxy server. Send
user=phone feature allows adding user=phone to the SIP header of the INVITE
message.
Example of a SIP INVITE message:
INVITE sip:101@10.2.1.48:5060;user=phone SIP/2.0
Via: SIP/2.0/UDP 10.3.20.6:5060;branch=z9hG4bK2475812834
From: "1010" <sip:1010@10.2.1.48:5060>;tag=3747068208
To: <sip:101@10.2.1.48:5060;user=phone>
Call-ID: 0_4008470062@10.3.20.6
CSeq: 1 INVITE
Contact: <sip:1010@10.3.20.6:5060>
Content-Type: application/sdp
Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL, OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER,
PUBLISH, UPDATE, MESSAGE
Max-Forwards: 70
User-Agent: Yealink SIP-T23G 44.80.0.60
Allow-Events: talk,hold,conference,refer,check-sync
Content-Length: 300
482
Parameter
phone_setting.ringing_timeout
Permitted Values
Integer from 0 to
3600
Default
180