Definition of "comm"

I didn’t appreciate it yet, but the bike I’d bought was a little too big for me and I wasn’t sitting in the optimal position. One day, a few weeks in, I posted a sitrep: ‘Frustrating day with delays, crazy truck drivers, no room at the inn, comms playing up — but covered over 110km!’

2016, Chris Graham, Five Minutes of Amazing: My Journey Through Dementia, London: Sphere, page 41