Planet Technology VIP-321 - Manual (Page 20)

SNTP settings
This page defines the primary and second SNTP Server IP Address, to get the date/time information.
Also you can base on your location to set the Time Zone, and how long need to synchronize again.
Volume Setting
Selects the “Volume Settings” item to configure the settings for adjust the handset volume and
sending gain.
Parameter Description
Handset Volume To set the volume for you can hear from the handset.
PSTN-Out Volume To set the volume for you can hear from the PSTN line.
Handset Gain To set the volume send out to the other side’s handset.
PSTN-In Gain To set the volume send out to the other PSTN side’s handset.