Grandstream Networks WP820 Administration Manual page 29

Chain
The default setting is "No".
Specifies if the phone will check the incoming SIP messages caller ID and CSeq headers. If the message does not
Validate
include the headers, it will be rejected.
Incoming SIP
Messages
The default setting is "No".
Configures whether to dial the number carried by Refer-to after received Out-of-dialog SIP REFER request actively.
● If set to "Disabled", the phone will send error warning and stop dialing.
Allow Unsolicited
● If set to "Enabled/Force Auth", the phone will dial the number after send authentication, if the authentication
REFER
failed, then stop dialing.
● If set to "Enabled", the phone will dial up all numbers carried by SIP REFER.
The default is "Disabled".
Answers the SIP request from saved servers when set to "Yes", only the SIP requests from saved servers will be
Only Accept SIP
accepted; and the SIP requests from the unregistered server will be rejected.
Requests from
Known Servers
The default setting is "No".
Check SIP User
Configures the phone to check the SIP User ID in the Request URI of the SIP INVITE message from the remote
ID for Incoming
party. If it does not match the phone's SIP User ID, the call will be rejected. The default setting is "No".
INVITE
Configures if allow SIP Notification message to perform factory reset.
Allow SIP Reset
The default setting is "No".
Authenticate
Configures the phone to authenticate the SIP INVITE message from the remote party. If set to "Yes", the phone will
Incoming
challenge the incoming INVITE for authentication with SIP 401 Unauthorized response. The default setting is "No".
INVITE
SIP Realm Used
Configure this item to validate incoming INVITE, but you must enable authenticate incoming INVITE first to make it
for Challenge
take effect. You can verify the NOTIFY information for the provision, including check- sync, resync and reboot, but
INVITE &
only when SIP NOTIFY authentication enabled first to make it take effect.
NOTIFY
MOH
Loads the MOH (Music on Hold) file to the phone. Click on "Browse" button to upload the music file from local PC.
The MOH audio file has to be in .wav or .mp3 format.
Upload Local
Note: Please be patient while the audio file is being uploaded. It could take more than 3 minutes to finish the
MOH Audio File 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 Plays local MOH file if the call is being hold by the phone. Users need to upload local MOH audio file. The default
MOH setting is "No".
Advanced Features
Different soft switch vendors have special requirements. Therefore, users may need select special features to meet
Special Feature 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".
Feature Key This feature is used for BroadSoft/Metaswitch call feature synchronization. When set to BroadSoft/Metaswitch, DND
Synchronization and Call Forward features can be synchronized with BroadSoft or Metaswitch server. Default settings is "Disable"
Allow Sync Allows users to synchronize XML phonebook upon receiving SIP NOTIFY message with header Event: sync-
Phonebook via contacts.