User's Manual

GXP2200 USER MANUAL Page 108 of 131
will use this port_value for RTP and the port_value+1 for its RTCP;
channel 1 will use port_value+4 for RTP and port_value+5 for its RTCP.
For video, channel 0 will use port_value+2 for RTP and port_value+3 for
its RTCP; channel 1 will use port_value+6 for RTP and port_value+7 for
RTCP. The default value is 5004.
Use Random Port When set to "Yes", this parameter will force random generation of both
the local SIP and RTP ports. This is usually necessary when multiple
phones are behind the same full cone NAT. The Default setting is "Yes"
(This parameter must be set to "No" for Direct IP Calling to work).
Disable in-call DTMF display When it's set to "Yes", the DTMF digits entered during the call will not
display. The default setting is "No".
Keep-alive Interval (s) Specifies how often the phone sends a blank UDP packet to the SIP
server in order to keep the "ping hole" on the NAT router to open. The
default setting is 20 seconds.
STUN Server The IP address or Domain name of the STUN server. STUN resolution
results are displayed in the STATUS page of the Web GUI. Only
non-symmetric NAT routers work with STUN.
Use NAT IP The NAT IP address used in SIP/SDP messages. This field is blank at
the default settings. It should ONLY be used if it's required by your ITSP.
SIP TLS Certificate Defines the SSL certificate used for SIP over TLS.
SIP TLS Private Key Defines the SSL Private key used for SIP over TLS.
SIP TLS Private Key Password Defines the SSL Private key password used for SIP over TLS.
ADVANCEDSETTING/CALLFEATURES
Disable Call-Waiting Disables the call waiting feature. The default setting is "No".
Disable Call-Waiting Tone Disables the call waiting tone when call waiting is on. The default setting
is "No".
Disable DND Reminder Ring Disables the DND remindar ring. If set to "Yes", the ring splash that
indicates an incoming call when DND is enabled will not be played. The
default setting is "No".
Disable Direct IP Call Disables Direct IP Call. The default setting is "No".
Use Quick IP-Call mode When set to "Yes", users can dial an IP address under the same
LAN/VPN segment by entering the last octet in the IP address. To dial
quick IP call, offhook the phone and dial #XXX (X is 0-9 and XXX
<=255), phone will make direct IP call to aaa.bbb.ccc.XXX where
aaa.bbb.ccc comes from the local IP address REGARDLESS of subnet
mask. #XX or #X are also valid so leading 0 is not required (but OK). No