Prestige 2302 Support Notes
All contents copyright (c) 2005 ZyXEL Communications Corporation.
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Step 2: Access the web configurator and click VoIP > Advance Setting.
Select the "primary compression to G.729" and "DTMF mode to SIP info" options
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Step 3: Click VoIP > Trunking and select to enable trunking. You can also enable auto attendant
authentication if pin code authentication is required before using the trunk.