Installation procedure

● Unpacking, then check carefully according to the packing list if the outside wrapping is complete or not, the model and the quantity are in accordance with which you order, if any problem, please contact our after-sales service department immediately.
● Examine the way of power supply whether it is correct.
●Before use, please test as following:
Make FXO port device insert phone incoming line and FXO port device insert phone. when hang up,and you should hear phone line feedback invoice
●    If indicators operate normally, unpress all switches on back panel and turn off power, set clock accordingly and insert E1 input and output line, then turn on power, device will work in normal status.