Outbound Call Route is a very powerful tool. You can build routing tables for multiple carriers and features.
Just as an example, here's mine:
{911:sp4},{411:sp4},{(01144345xx.):sp4},{(10x):sp2},{(011xx.):sp2},{(033xx.):sp2},{(044xx.):sp2},{([1-9]x?*(Mpli)):pp},{**0:aa},{***:aa2},{(<**1:>(Msp1)):sp1},{(<**2:>(Msp2)):sp2},{(<**3:>(Msp3)):sp3},{(<**4:>(Msp4)):sp4},{(<**9:>(Mpp)):pp},{(Mpli):pli}
So, much of that is the standard one, but starting on the left, here's what I added:
911 calls go to SP4 (Callcentric);
411 calls go to Callcentric via "Free 411";
Calls to the 0345 non-geographic "local" exchange in England go to Callcentric (voip.ms can't route these for some reason);
3-digit extension numbers (100,101, etc) are handled by SP2 (voip.ms);
The next three foreign call prefixes are routed via
voip.ms. 033 and 044 are like 011 except specify whether you want their "economy routing" or not. (Oddly enough, some of their "standard route rates" to overseas cell phone carriers are cheaper than the "economy" route, often by quite a bit. If you're using a carrier like
voip.ms that wholesales from multiple sources and gives you a choice, you need to check rates on both routes. If it's someone you call often, you can code that in your speed dial.);
And the rest is the standard default string.
Being able to code outbound routing between multiple carriers and rates is one of the super features of the Obihai devices. It's like running your own phone company.