On 19 Mar, 12:33, wrote:
AIUI FCC would not require GSM on 377s for the same reason that SN do.

The Victoria 377 problem is GSM, yes, sure, but it is for postioning
for SDO.

FCC/TL *won't be using SDO ... they do not use it anywhere on their
network pre-KO0

Yes they will!! The 377/5s are Southern units, built to Southern
specifications. Whether FCC need SDO is not relevant! One thing we
found on Southern when the 377s came in was that an 8 car 455 station
wax not an 8 car 377 station, e.g Mitcham Jnc & Battersea Park