Grandstream Networks WP820 Optimization Guide

P a g e | 6
WP820
Battery Optimization Guide
3. NAT keep alive setting is too short
a. Device SIP or NAT keep-alive settings:
If using a short interval for SIP or NAT keep alive it will affect the battery life significantly. Please first check
if the device requires NAT keep-alive function to operate properly. If required to use NAT keep alive, please
use an interval slightly lower than the refresh time of NAT mapping. For example, if the maintenance time
of NAT mapping is 30 seconds, then the recommended keep-alive interval of NAT will be 25 seconds.
Figure 2: Basic Settings
b. Server keep-alive setting:
Some servers have enabled the keep-alive function for NAT devices and will send a SIP Options keep-alive
message every 20-30 seconds. This message will wake up the system regularly and have a significant
impact on battery life. If possible, please adjust the keep alive message interval of the server appropriately
according to the NAT mapping refresh time. Confirm the necessity of the function and disable it if not needed.
(Note: If the server is already sending keep-alive, please disable keep-alive on the client side.)

Grandstream Networks WP820 Specifications

General

Brand	Grandstream Networks
Model	WP820
Category	Cordless Telephone
Language	English