There is a box has outlook and size very similar to MCK 1000U extender. There a label on the left hand sid shows "Positron" logo on right and a label "Telebridge" on left. There is part number on the bottom "T-829TM-MNM" "829AT-4200". It connects to nortel cs1k and can similate the M2616 phone function by send command throught RS232. There is no infomation on web. Please help