Anup Engineering & Aluminum Industries supplies 4/ 6/ 12 Channel Frame Relay Card. Anup Engineering & Aluminum Industries manufactures a wide range of Energy Saving Lights, Outdoor Lighting Equipment, Led Light Fittings and acrylic moulding machine. The 4/ 6/ 12 Channel Frame Relay Card is used to provide easy readability that enhances the understanding of relay names and shaft indications. The 4/ 6/ 12 Channel Frame Relay Card can also be used for various applications like VVVF, DOL, duplex and hydraulic.