The full duplex setting is hard-wired into the series 3 phones. You can either use the feature codes (Feat 66, 066)or program a SPKR Duplex key on the phone itself. There is nowhere in programming that will list which phones are set which way.

(Edited fer speling)


Sometimes the thoughts in my head get so bored, they go for a stroll through my mouth. This is rarely a good thing.