>sip  ?
          ?    Show 'sip' Option
    -proxy0    sip -proxy0
    -proxy1    sip -proxy1
    -proxy2    sip -proxy2
      -upnp    sip -upnp on/off/show
      -exts    sip -exts sip upnp external-port
      -extr    sip -extr rtp upnp external-port
      -sipp    sip udp port
      -rtpp    sip rtp port
      -stun    sip -stun on/off
     -rport    sip -rport on/off
   -sserver    sip -sserver stun-server
       -out    sip -out outbound-proxy
      -dump    sip -dump
       -log    sip -log on/off
      -drtp    sip -drtp 0/1/2
     -rtpnc    sip -rtpnc on/off
     -wanip    sip -wanip
   -nattype    sip -nattype
  -holdmode    sip -holdmode 0/1/2
     -dereg    sip -dereg
   -restart    sip -restart
     -rpack    sip -prack
-virtualring    sip -virtualring
-nortelnapt    sip -nortelnapt
-sendsiptosrv    sip -sendsiptosrv
-keepalivepkt    sip -send keep alive packet on/off
-nothirdpty    sip -No Third Party Call Ctl on/off
       -jbt    sip -jitter buffer Threshold
  -dtmfmode    sip -dtmfmode 0/1/2
 -dtmfflash    sip -dtmfflash 0/1/2
-kpalivepktper    sip -kpalivepktper sec
        -t1    sip -t1 500ms
      -m1t2    sip -m1t2 500ms
      -m3t2    sip -m3t2 500ms
  -maxtrans    sip -maxtrans 500ms
 -checkuser    sip -checkuser on/off
-cancelwototag    sip -cancelwototag on/off
    -dnssrv    sip -dnssrv on/off
 -anonymous    sip -anonymous on/off
      -rtcp    sip -rtcp on/off
-uadisplaymode    sip -uadisplaymode 0/1/2
-mustresponsetovia    sip -mustresponsetovia on/off
-encryptsip    sip -encryptsip on/off
-encryptrtp    sip -encryptrtp on/off
-advrtpchsum    sip -advrtpchsum on/off
   -delayms    sip -delayms 0-255
-setencryptfun    sip -setencryptfun 0/1
    -t38atb    sip -t38atb on/off
    -syslog    sip -syslog 0/1/2/3
     (null)    Show SIP Setting
OK