Yealink SIP-T4 Series Configuration Guide

BROADSOFT PARTNER CONFIGURATION GUIDE – YEALINK T4X IP PHONE 20-BD5476-00
©
2017 BROADSOFT INC. PAGE 21 OF 150
Step Command Purpose
System Configuration Items y0000000000<xx>.cfg
Step 5 Enable reliable response.
account.1.100rel_enable = 1
Reliable provisional response
(PRACK) should be enabled.
Step 6 Enable Session Timer.
account.1.session_timer.enable = 1
account.1.session_timer.expires =
300
account.1.session_timer.refresher
= 1
Set the T4xG IP Phone to enable
Session Timer.
Session Refresher:
0 = uac
1 = uas
Step 7 Enable Call Waiting.
call_waiting.enable = 1
call_waiting.tone = 1
Set the T4xG IP Phone series to
enable Call Waiting and Call Waiting
Tone.
Step 8 Enable MWI.
account.1.subscribe_mwi = 0
account.1.subscribe_mwi_expires
=3600
MWI: Solicited when setting
SubscribeMWI = 1.
MWI: Not solicited when setting
SubscribeMWI = 0.
Step 9 Enable negotiated DTMF type.
account.1.dtmf.type = 1
Set the T4xG IP Phone to enable
inband or RFC 2833 negotiated
DTMF.
Step 10 Select Transport Type.
account.1.sip_server.1.transport_
type = 0
Set the SIP transport:
Transport = 0 (UDP)
Transport = 1 (TCP)
Transport = 2 (TLS) (except T18P)
Transport = 3 (DNS-SRV) (except
T80P)
Step 11 Enable Feature Key Sync.
bw.feature_key_sync = 1
Enable Feature Key Sync (except
T18):
1 = Enabled
0 = Disabled

Yealink SIP-T4 Series Specifications

General

Brand	Yealink
Model	SIP-T4 Series
Category	Telephone
Language	English