mrjoe,
VoiceGateway 5 can be used for outgoing calls, you just can't access it with **5. If you have a need, you can use VoiceGateway5 to setup an outgoing voip provider. The problem is, as you noted, you can't access it with the **5 scheme because as noted elsewhere OBi firmware preempted that dialing prefix for something else that isn't fully documented. You can setup some different dialing prefix, something different from **5, to route a call using a configuation you have setup in VG5.
The VoiceGateway dialing scheme referenced in an early post that uses **3, **4, **6, etc. was setup to follow the scheme setup by OBi where OBi uses **1 for SP1, **2 for SP2, **8 for PSTN Line, **9 for OBiTalk. You could setup a different dialing scheme for instance using **6x (i.e. **61, **62, **63, **64, **65, **66, **67, **68) or other dialing prefixes for the Voice Gateways if you wish.
Another way to use VoiceGateway5 would be to setup outbound routing for calls to certain numbers using the VoiceGateway. Recently Stewart posted a technique where calls to U.S. Toll Free numbers were sent using a specific provider setup on a VoiceGateway ...
"The OuboundCallRoute for the Phone 1 port contains: ...,{(1(800|855|866|877|888)[2-9]xxxxxx):vg5},..."
http://www.obitalk.com/forum/index.php?topic=3821.0
