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PX24MLrXPartNumbersBasic system Expansion Module Modules and optional mounting products 16 port FXS, 15 port digital subscriber 8 port FXS 8 port FXO 4 port FXO 8 port FXS, 4 port FXO hybrid 6 port FXS, 4 port FXO, 2 digital subscriber hybrid 8 port digital subscriber E1 Additional VoIP Other licenses |