mitel 3000 software vision6.1 with one expansion module. the main bay exts initialized but no audio.You can call extention on main ring they will ring but no ring back tone will be heard. extention sets on expansion module not initializing.
I believe the 3000 is a four wire system, it has a data/power pair and a speech pair. All I can offer you in advice is to make sure the speech pair is ok, the phone will dial and function but will have no speech with the data pair.
I can only comment based on another four wire system not the 3000.
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