User Guide

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R20A
Admin Guide
Multicast codec： Go to Phone - Call Feature to configure
multicast related codec.
4.2.5. 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.
4.2.6. Encryption
Go to the path Account - AdvancedIf enabled, voice will be
encrypted.
4.2.7. NAT
Go to Account - Advanced to display NATrelated settings.
UDP Keep Alive message: If enabled, IP phone will send UDP
keep-alive message periodically to router to keep NAT port alive.
Figure 4.2.5 Session timer
Figure 4.2.6 Encryption
Figure 4.2.7 NAT