supply of - modern epabx system as per specification mentioned in section 6 , analog subscriber line extension card with minimum 20 ports , digital key phone interface card minimum 8 ports , hybrid expansion card comprising minimum 4 central office co ports 2 digital key phone dkp ports and 12 analog extension slt ports , 100 pair main distribution box complete with krone type termination modules , single port rj11 io keystone jack set complete with back box io module and face plate , supply