I would be surprised if you got in trouble for occasionally calling emergency services to clearly communicate you were testing if it works. During normal operations they should have extra capacity and they presumably also would like you to be confident you can reach emergency services in an emergency.
EDIT: I should specify a great way to be sure this is okay is call the non-emergency number for your local law enforcement and ask them if you can place a test emergency call. In a lot of cases, you will end up speaking to the same people who answer emergency calls, and they can tell you if now would be a good time or not.
It is expressly forbidden to place test calls in the UK to 999. I could pretend to be a confused pensioner calling a taxi but that is not right and I can;t write that up.
The generally accepted method is to subscribe to your TSP's emergency number provision, when doing VOIP. However, it never gets tested and what if a 9 was typed as an 8 in the dialpan?
I used to put in ATAs which are SIP to copper voice bridges (for want of a better phrase) but copper is going away and ATAs are bit thin on the ground these days.
I like change in general but there are some pretty fundamental changes that our gov have not noticed might cause a few issues soon.
Ironically for me: My house is within the nearest town boundary and has copper from the cabinet provision (FTTC). The cabinet is about 500m away. We have had four separate teams rock up to pull fibre to my door and failed. Each one have decried the last team and said it will be fine by close of play.
I am seriously considering putting in wifi PtP to my office from home.
EDIT: I should specify a great way to be sure this is okay is call the non-emergency number for your local law enforcement and ask them if you can place a test emergency call. In a lot of cases, you will end up speaking to the same people who answer emergency calls, and they can tell you if now would be a good time or not.