User Manual

Menu - Configuration

Step.11 - In the same SIP settings menu > SIP KEEP ALIVE >

Key in the SIP KEEP ALIVE time for eg:- 20Seconds

and choose ENABLE and select it.

Note: This is to overcome the NAT barrier so that the phone is

contactable by a previously contacted external party.

Step.12 - Return to SIP SETTINGS menu > AUDIO CODEC > for eg:-

choose G711-A and select it.

Step.13 – After the configuration, select > ACTIVATE.

Note: This is a program capable of performing encoding

and decoding a voice package.

Note: STUN = Simple Transversal of UDP (User Datagram Protocol)

through NATs (Network Address Translators).

TIP: Enter either the IP address of your SIP server or the URL domain name as given to you by your

Internet Telephony Service Provider.

Fig.48 Audio Codec Screen