I always start with a restricted route for calls I don’t want to go out, using these dial patterns. It routes to a disabled trunk.
Then I have an emergency route for 911 calls.
(I use 111 to test my emergency routes without having to dial 911). 111 is defined in every trunk to call a specific non-emergency test #, such as 800-555-8355
Then I have an interoffice route
The above allows you to dial 222 and your call will be delivered to 2125551212. Change the #s as you desire. I prefer speeddials here because it allows me to set a custom caller ID for them and set a specific route.
Then 800 calls
Then a route to dial 81 to dial my POTS Line 1
Then a similar route to dial my POTS line 2.
Then a similar route to allow 83 to force calls using one particular SIP provider, and another similar route for 84 for my backup provider.
Then a Caller ID Blocked route:
A force specific caller ID route (which has the Route CID override feature on to force a specific caller ID in a specific area code):
(the second to last line allow me to dial *212 and then do 7-digit dialing).
And finally, a normal route: