Antrax - Сonsultation on system performance
PDD- this is the time from the end of dialing to start of alerting. PDD is influenced by such factors as:
1. Quality of the Internet;
2. GSM signal level;
3. Load of available base stations in the cells of the operator (base station- complex of radio transmitting equipment
(repeaters, transceivers), which provides communication with a cell phone. Complex of base stations, which are located nearby, forms a cell.).