My Partner ACS R5.0 with its Avaya 18D telephones received Caller ID Name and Number with no problems. Yesterday, we switched telephone providers and installed a new AT&T integrated T1. I've confirmed that AT&T is sending Caller ID because I plugged in an analog ID device directly into the lines and can see the signals properly arriving. Therefore, my ACS is blocking the Caller ID signals somehow. But, when I switch back to the old provider, it works fine. Is there some configuration in the programming that is blocking the new provider but not blocking the old provider?