I have a 10.1 SE with 3 500v2s and a few hundred analog extensions in a assisted care facility. We purchased new Cortelco Caller ID Type II Model 2730 with a big display. I have rooms where there are multiple phones bridged onto the same extension. If one of the Cortelcos is off hook and another of the bridged extensions picks up that user cannot speak in the conversation (can hear). The display on the Cortelco also gets dim. Is there any setting for the analogs? Is there a power usage document that I can refer to?