Welltech WG26xx Series V.1.08a - Manual (Page 23)

26xx Technical Manual EN-V108
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3.3 General configuration
To make VoIP calls, you will need a SIP account provided by the SIP
Proxy you are registered with. To configure the relevant SIP settings,
please refer to the instructions explained below.
3.3.1 PABX Mode (Wellgate 2644 and 2644P use)
This quick setting is dedicated to be used for Wellgate 2644 to become a
inter-connection in between PSTN and traditional PABX. The call scenario will be
working as below:
1. For FXO incoming call, it will route to corresponding FXS directly (1 by 1)
2. For FXS outgoing call, it will route to VOIP except those prefix set in FXO
dialing Prefix.
3. For VOIP incoming call, it will route to FXS based on the called number
4. When VOIP call is failed to be called out such as register fail or network
issue, the call will be route to FXO as backup.
5. When Wellgate 26xx is malfunction or power failure, the all call will be
directly bypassed to FXO.