To Study The Features & Working Of An EPABX

Model HV-EXP2121
To Study The Features & Working Of An EPABX; Based on 89C51 CPU; 1 trunk line & 4 extension lines.; IBM PC compatible keyboard for using commands; 20 x 2 LCD Display; Complete circuitry of EPABX is on board; Works in 2 Modes : - Trainer Mode - EPABX Mode Explanation, observation, Alignment and adjustment of internal & external controls would be possible; Facility to write programs for different section in RAM; Programs written by user would be executable; Standard EPABX specification.; 70dbm Cross Talk Attenuator; Three telephone Instruments; Following Experiments can be performed on the trainer :; - Redial - Extension to Extension Call - Paging - To hold a line - Call consult - Call parking - Call forwarding busy - Talk trunk to extension - Call pickup - Call transfer - Auto call back - Locking/Unlocking etc..