GRANDSTREAM NETWORKS, INC 2 FXO, 2 FXS, 500 Users Audio ONLY

GRANDSTREAM NETWORKS, INC 2 FXO, 2 FXS, 500 Users Audio ONLY2 FXO, 2 FXS, 500 USERS AUDIO ONLYFeatures of GRANDSTREAM NETWORKS, INC 2 FXO, 2 FXS, 500 Users Audio ONLY UPc: 6947273703556 Weight: 2650 l...