Nortel/Kapsch BTS8000 RF output cable position, something like a 27 or 32 mm nut on the RF connector so that ham fisted idiots as they tighten it smack the large spanner into the tiny 8mm brass connectors for the low power side which is too close, bending and cracking them.
Same BTS has some power connectors secured with tiny flat head screws that you cannot get at as the moulded connector sweeps over the screw obscuring it. God knows how it gets tightened in the factory without chewing it to smithereens.
Alcatel 1511BA craft terminal software, clunky, much modified and when it gets stuck defaults to Italian.
Radio monopole masts with “click fit pegs” to leave the pole looking cleaning when it’s not being climbed. Truly horrible climbing and fitting pegs, especially new pegs covered in paint that really don’t want to fit onto the studs.
The interface board fitted to Saft battery chargers we use. It’s supposed to be hot swappable BUT as muggins found out in the real world it blips the output enough to shutdown and restart a whole telecoms core node, blacking out safety critical comms/signalling over a large area. Oh I was a popular man that night.