Phone Settings Page Definitions; Phone Settings/General Settings; Call Settings - Grandstream Networks GSC35 Series User Manual

Note
Users can modify the name of the number listed in the blacklist by clicking on
Greylist
This section allows the user to define the blocking rules for Non-white list calls. The blocking rules available for the users are:
• Block: Configures the GSC3516 to block all the numbers that are not listed in the Whitelist.
• Auto Answer: Configures the GSC3516 to allow all the calls received from any number but the number listed in the blacklist.
• Set Password: requires a password before they can be answered.
• Ringing: all greylist calls will continue ringing. Default ring time is 60s.

Phone Settings Page Definitions

Phone Settings/General Settings

Local RTP Port
Local RTP Port Range
Use Random Port
Keep-alive Interval
STUN Server
TURN Server Username
TURN Server Password
Use NAT IP

Call Settings

Enable Call Waiting
Enable Call Waiting Tone
Defines the local RTP port pair used to listen and transmit.
The default value is 5004. The valid range is from 1024 to 65400.
Configures the range of local RTP port. Valid value is from 24 to 10000.
Default is "200"
Forces the device to use random ports for both SIP and RTP messages. This is usually necessary when
multiple phones are behind the same full cone NAT. The default setting is "No".
Note: This parameter must be set to "No" for Direct IP Calling to work.
Specifies how the device will send a Binding Request packet to the SIP server in order to keep the "ping
hole" on the NAT router to open. The default setting is 20 seconds. The valid range is from 10 to 160.
Configures the URI of STUN (Simple Traversal of UDP for NAT) server. The device will send STUN
Binding Request packet to the STUN server to learn the public IP address of its network. Only non-
symmetric NAT routers work with STUN.
Fill in the username to validate TURN server.
Fill in the password to validate TURN server.
Configures the IP address for the Contact header and Connection Information in the SIP/SDP message. It
should ONLY be used if it's required by your ITSP. By default, the box is blank.
Table 18: Phone Settings – General Settings
Enables call waiting feature. If it is disabled, it will reject the second incoming call during an
active session without user's knowledge. But this missed call record will be saved to remind
users. The default setting is checked (enabled).
Sets to play the call waiting tone along with LED indicator if there is another incoming call. If
unchecked, only LED will indicate another incoming call. The default setting is checked
.