UC560 has CO line apperances on Buttons.
Ho can you setup such that you can barge in and join the call when the light is lit red?
below is support information:
voice-port 0/1/0 connection plar opx 3A10 description Configured by CCA CO Line - 0/1/0-CO0 caller-id enable
ephone-dn 295 dual-line number 3A10 no-reg primary label CO Line 1 description CO Line 1 name Line 1 trunk A0 monitor-port 0/1/0
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