serial port

Hello, friends, how are you? I have an alarm device from Hikvision(Axpro64), and I need a way to help me change the imei number on the device. Recently, I opened the cover of a device and noticed that there was an electronic piece of the sim card(Sim Com)"I will attach a picture of it" bearing...

Hi Dear Mates .How is it going? I have the DVR stated in the subjet and I would like to know where is located the serial pinout to get access via TTL- Converter. Look these screen and let know where them are located and let me know how to figure out this. Thanks in advance

Dear techies, I have a DS7716NI I4, and it freezes sometimes, not often but lets say once in 2 months. It is on a remote location and I want to implement a way to restart it when there is no IP connectivity. I see there are two serial ports on it. - RS232 - RS485 my question is, Is it...