... used when a landline connection is not available where voice, fax or internet are required. It ... 2,SKYLINE 8PortsGSMFWT2.1, Our GSM FWT meets to the China National Communication Standards YD/T884-1996. ... in advance,please tell sales when you decide to buy. 5, Specific function details Make and receive ... recovering default condition Set adding prefixed IP number to dial Set auto-answer incoming call Set ...