User's Manual Part 6
673)
Notes: 1/ Remove R77 for trunked modem operation
or, in non-trunked radios, to remove external
inhibit on busy.
2/ R90, R91 should be removed for two-wire
crossband when
moulded cord sets are used. (HD15M-HD15M)
This is to avoid PSU conflicts between radios.
(+8V out, +13V out.)
;%<30:;+;2