My customer has a BCM 400 4.0 and they have the IP Telephony Manager with wireless handsets. They just transitioned to a new owner. The company that took care of their phone systems before did not pass on IP addresses and passwords to the BCM's or the Telephony Managers. We have a company we use for tech support and they have never dealt with the wireless handsets and neither have we. Apparently they worked for a few weeks after the takeover but then stopped. I need to know how to troubleshoot this and get those handsets back up and running. Anyone who has had experience with these and could lend a hand would be great. There is a serial port on the front. I just need to know how to connect to it and maybe pull the IP address off or change the IP address.