, ▁in ▁the ▁group , ▁or ▁into ▁a ▁dedicated ▁server ▁to ▁which ▁the ▁service ▁ac quisition ▁requests ▁are ▁received , ▁pre process ed , ▁and ▁ultimately ▁dispatch ed ▁though ▁the ▁T ET RA ▁core ▁network . ▁This ▁simpl ifies ▁the ▁re configuration ▁or ▁rec y cling ▁configuration ▁process ▁allowing ▁flex ibility ▁on ▁short ▁assign ments . ▁ ▁The ▁parameters ▁tab ▁also ▁provides ▁a ▁means ▁of ▁choosing ▁between ▁pr ese lect ed ▁t ones ▁to ▁match ▁the ▁work ▁group ▁requirements ▁for ▁the ▁purposes ▁of ▁fra ud ▁and ▁ag gression ▁alert s . ▁A ▁possibility ▁of ▁selecting ▁any ▁given ▁key ▁available ▁from ▁the ▁key pad ▁to ▁serve ▁as ▁an ▁ag gression ▁or ▁fra ud ▁quick ▁key ▁is ▁also ▁made ▁possible ▁though ▁the ▁transport ▁application ▁software ▁tool ▁k it . ▁It ▁is ▁recommend ▁to ▁use ▁the ▁a ster isk ▁and ▁the ▁hash ▁keys ▁for ▁the ▁fra ud ▁and ▁ag gression ▁quick ▁keys ▁respectively . ▁For ▁the ▁fra ud ▁and ▁ag gression ▁t ones , ▁it ▁is ▁also ▁recommend ▁to ▁use ▁ 4 4 0   Hz ▁slow ▁repeating ▁tone ▁( blank ▁space ▁ 5 0 0 ▁mill i - seconds ) ▁and ▁ 8 8 0   Hz ▁fast ▁repeating ▁tone ▁( blank ▁space ▁ 2 5 0 ▁mill iseconds ) ▁respectively . ▁ ▁The ▁tone ▁options ▁are ▁as ▁follows : ▁ 4 4 0   Hz , ▁ 6 2 0   Hz , ▁ 8 8 0   Hz , ▁and ▁ 1 0 6 0   Hz . ▁ ▁The ▁parameters ▁page ▁provides