When we take apart the case of the terminal device and strip off the battery, we can see that there are slots for inserting the corresponding card. Common cards that can be inserted into terminal devices include SIM cards, TF cards, and PSAM cards. These are common, but are you aware of them?

The full name of SIM card is Subscriber Identity Module, SIM card for short, which is commonly known as "mobile phone card". The SIM card is inserted into the mobile terminal to implement the communication function of the device, namely, call and Internet access. SIM card form can be divided into card type (large card) and embedded (small card). Now the small card has gradually replaced the big card, become the mainstream of the current application. The Blue PDA is also a SIM card with a small card.

The full name of TF card is Trans Flash card, also known as "Micro SD card", is what we often say memory card. TF card size is small, only 15mmx11mmx1mm, can save space. TF card has many kinds of storage capacity, the common storage capacity is 2G, 4G, 8G, 16G, 32G, 64G, 128G. At present, the storage capacity of Micro SD(TF) card of Lanchang terminal equipment can be expanded to 128G.

                                      

The full name of the PSAM card is Purchase Secure Access Module and the Chinese name is "point-of-sale Terminal Secure Access Module". PSAM is mainly embedded in terminal devices and plays a role of security protection. In addition, the PSAM card also has the function of computing. PSAM card can encrypt data information, which is more used in the financial field, enterprise management and other fields.

Figure N60 Installing an SIM card

The features and priorities of the three devices are different. Therefore, when purchasing terminal devices, you need to consider the scenarios in which terminal devices are required. Take Lanchang's S90 printing integrated terminal as an example, the reserved card slots are Nano SIM card ×1, TF card ×1 and PSAM×2(optional). The PSAM card slot is optional. Customers need the PSAM code function. The P502 supports this function.