Phone Settings Page Definitions; Phone Settings/General Settings - Grandstream Networks WP820 Administration Manual

Note: Please be patient while the audio file is being uploaded. It could take more
than 3 minutes to finish the uploading especially the file size is large. The button
will show as "Processing" during the uploading. Once done, it will show as
"Browse" again. Click on "Save" on the bottom of the web page and "Apply" on the
top of the web page to save the change.
Enable Local MOH Plays local MOH file if the call is being hold by the phone. Users need to upload
local MOH audio file. The default setting is "No".
Advanced Features
Special Feature Different soft switch vendors have special requirements. Therefore, users may
need select special features to meet these requirements. Users can choose from
Standard, Broadsoft, China Mobile, ZTE IMS, Mobotix, ZTE NGN, Huawei IMS,
NEC or WorldStone depending on the server type. Default setting is "Standard".

Phone Settings Page Definitions

Phone Settings/General Settings

Basic Settings
Local RTP Port Defines local RTP port used to listen and transmit RTP packets.
Valid range is 50040 – 65000. Default is 50040.
Use Random Port Forces the phone 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.
Disable In-call DTMF Disables the phone to omit displaying DTMF digits during call on the LCD screen.
Display The default setting is "No".
Keep-alive Interval
Specifies how often the phone will send a Binding Request packet to the SIP
(s) server in order to keep the "ping hole" on the NAT router to open. The valid range
is from 10 to 160. The default setting is 20 seconds.
STUN Server Specifies the IP address or the Domain name of the STUN (Simple Traversal of
UDP for NAT) server. The phone will send STUN Binding Request packet to the
STUN server to learn the public IP address of its network. STUN resolution results
are displayed in the status page of the phone Web GUI. Only non-symmetric NAT
routers work with STUN. Default is "stun.ipvideotalk.com".
WP820 Administration Guide
Version 1.0.1.15
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