I've prepared some examples of team work, working alone.
I'd be throwing in some examples of problem solving as well.
What concerns me is I don't come from any sort of telecoms or technical background,
All my training had been as a chef, 8 years in the catering trade, a further 8 years as a civil engineering labourer .... zero experience in telecoms or technical. I'm just about to chalk up my 19th year as a BT/Openreach engineer, and without wishing to blow my own trumpet, I do OK.
For me initial attitude is everything in a new starter. Not too cocky, personable, happy to be schooled, and willing to work. Ability to speak to the punters is another hugely underestimated skill.
Good luck, what area of the country will you be working ?