Caller ID is used for bringing to the screen automatically about account's information who called you where recorded in the Wolvox pre-accounting program. You want to make transactions whem coming phone; you can select from CallerID -> Transaction will be made when coming phone section. In general, the process is used to bring their account card. If you are using CallerID devices, you need to mark CallerID ( Use CallerID ) option. In Device field, you must select the type of device. If you set to be used COM Port, you will integrate your device to program.