BROADSOFT PARTNER CONFIGURATION GUIDE – YEALINK T4X IP PHONE  20-BD5476-00 
©
2017 BROADSOFT INC.  PAGE 83 OF 150 
sip.nat_stun.port = 
sip.timer_t1 = 
sip.timer_t2 = 
sip.timer_t4 = 
 
 
 
##It is XSI authentication mode.0-Disable  1-Enable (Except T19P/T21P 
Models) 
sip.authentication_for_xsi = 
##It is DSS KEY to call park type, whether the trigger BLF function.It 
takes effect after a reboot. 
##The default value is 0-Disable(DSS KEY to call park type,triggering BLF 
function)   1-Enable 
sip.call_park_without_blf = 
##It is ASCII conversion into corresponding symbols. 
##The defalult value is blank. 0-Disable   1-Enable 
sip.escape_characters.enable =  
##The default value is 0 ( said according to the transmission mode 
configured to listen on port),1- 
##1-said at the same time to monitor TCP and UDP 
##2-said to monitor TCP and UDP at the same time, and from the BLF - the 
LIST to subscribe to the contact with a transport = TCP parameters 
sip.listen_mode = 
##The default value is 0-Disable, 1-Enable.It takes effect after a reboot. 
##0-registered according to the uri of the tectonic refer - by domain 
##1-according to refer the from header fields to construct refer - by 
domain 
 
sip.refer_by_header_auto_build = 
##The default is blank.The Valid characters are digits - _.! ~ * # '() & 
Q462 = + R452 $,;?/ \ 0 
##It is username needs to be preserved in a special notation. 
sip.reserve_characters =  
##The default value is 0.(contracting out the random contact, via port to 
carry fixed port).It takes effect after a reboot. 
##1-the out-contracting port random contact, via port to carry 
##2-the out-contracting ports fixed contact, via carry fix 
sip.tcp_port_random_mode =  
 
 
 
##########################################################################
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##                                   Echo Cancellation       
##        
##########################################################################
############# 
voice.vad =  
voice.cng =  
voice.echo_cancellation =  
 
##########################################################################
############# 
##                                   Jitter Buffer                 
##        
##########################################################################
############# 
voice.jib.adaptive =  
voice.jib.min =  
voice.jib.max =  
voice.jib.normal =