(18 Jan 2017, 10:11 am)omnicity4659 wrote I could be wrong, but I think 2837 works off another service before and after working the 555. Of course, that service is prone to regulation, breakdowns etc.
Used to work the H1/H2 between 555s - until they were replaced by the 58.
So, in effect, 2837 is spare during the day