User Guide

R28A/V
Admin Guide
4.2.9.Session Timer
Go to Account - Advanced to configure.
If enabled, the on going call will be disconnected automatically
once the session expired unless it’s been refreshed by UAC or
UAS.
4.2.10.Encryption
Go to Account - Advanced to configure.
If enabled, voice will be encrypted.
4.2.11.NAT
Go to Account - Advanced to display NAT related settings.
UDP Keep Alive message: If enabled, the phone will send UDP
keep-alive message periodically to router to keep NAT port
alive.
UDP Alive Msg Interval: Keep alive message interval.
Rport: Remote port, if enabled, it will add remote port into
outgoing SIP message for designated account.
Figure 4.2.9 Session timer
Figure 4.2.10 Encryption
Figure 4.2.11 NAT