... rotate 3,Call termination 4,automatic rotate(8ports 32 SIM cards) 5, call back Description of Product:1,What is FWT ... often used when a landline connection is not available where voice, fax or internet are required. It is connection of landline type ... can avoid blocking sim cards totally. B, 8 ports with 32 sim cards, every port has 4 sim cards for rotation, reduce long ...