There are a number of ways you can configure to use a VoiceGateway for
ALL outgoing calls.
One way is the following:
1. Setup the Voice Gateway, say VG3
Name:
voip.msAccessNumber: SP1(losangeles.voip.ms)
DigitMap: (1xxxxxxxxxx|xx.)
AuthUserID: your_userid
AuthPassword: your_password
2. Setup Trunk Group 1
Name:
voip.msTrunkList: vg3
DigitMap (Mvg3)
3. Setup the Phone Port primary line to always use Trunk Group 1
PrimaryLine: Trunk Group 1
The above assumes SP1 is configured for Sip.
Voip.ms does allow you to make calls without registration and can be used in a voice gateway
Edit: On 2d thought sending all outgoing calls thru the VG might cause trouble is you are setting up 911 emergency calling.