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Chapter 11 Route Plan
The routing policy is the core feature of VGW-400 Series. The policy is based on incoming call
type, destination, length and prefix code to determine the outgoing call routes and process.
There are three routes to go for each incoming call port as follows.
The following rules do not apply to PABX Mode. (For VGW-402 only)
1. VOIP incoming call to VGW-400 Series, it routes to either FXO or FXS interface and vice
versa.
2. FXO incoming call to VGW-400 Series, it routes to either VoIP or FXS interface and vice
versa.
3. FXS incoming call (it means FXS off hook and dialing out) to VGW-400 Series, it routes to
either FXO or VoIP interface and vice versa.
11.1 For PABX Mode interface
For this application, FXS outgoing call was routed to either VOIP or FXO and vice versa. The
default route is that VOIP incoming call was routed to FXS and FXS call was routed to VOIP
network.
The PABX mode follows these rules to routes call as follows.
1. When FXO has incoming call to VGW-400 Series, it routes to FXS port only.
2. When VoIP has incoming call to VGW-400 Series, it routes to FXS port only.
3. When FXS make a dial out, the routes call was redirected to either VoIP or FXO according
to this gateway's DM and routing plan.
Internet Telephony Gateway
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VGW-400 Series
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