D80 Serial to IP GPRS Modem Wlink D80-1 is Industrial Serial to IP cellular GPRS modem (called as DTU as well) which convert the serial data (RS232/485/422) into IP data and then transfer to data center through GPRS 2.5G mobile network. Datasheet Application Firmware FeaturesMultiple operation modeAlways online: automatically attaches 3G Celullar when powered onautomatically redials when off line and keep line aliveOffline when idle and trigged online by user data, ring or SMSGPRS channel and SMS mutual backupOnline/offline control by commands via user equipmentData loop testMultiple data service centers communicationsSupports up to 4 data service centers communicationsSupports main/backup data service centers communicationsSupports customized setting for each data service centerFlexible and utilitarian data communicationsSupports TCP/IP, UDP/IP, DDPTM, SMS and ATSelf-defines transparent or protocol communicationsSelf-defines customized data frame separatorSelf-defines reconnecting intervalSelf-defines heart-beat data frameParameters configuration and remote managementBuilt-in parameters configuration menuConfiguration tool based on PCRemote parameters configuration via data service centerRemote parameters configuration by SMSParameters configuration via AT+ commandsFull function data service center development kitsProvides function development packageProvides complete sets of demo source code (VB, VC, C#, Delphi, VB.net)Provides data forwarding service center for data transparency forwarding