Details：
Square-metal hose-with adapter-4Pin interface

Details：
The phone has a built-in mobile phone card, and the user holds a valid card and inserts the card to make a call. Support 4 groups of family numbers; support 13.56M radio frequency card, ID card, CPU card, IC card; support network lock, lock operator, encryption card function, prevent illegal card use.

Details：
The phone has a built-in mobile phone card (China Unicom/Mobile supports 2G, 3G, 4G, and Telecom supports 4G and requires volte activation). Write the validity period and family number on the card issuing software to enable free family calls within the validity period of the card.

Details：
Supporting the insertion of SIM cards into public telephones for China Mobile Unicom; Support the insertion of telecommunications UIM cards into campus telephones with large cards; Support RFID-SIM two in one use; Kato can be used with 13.56M or 125K, M1 card and ID card, and campus one card system; Support custom stickers

Details：
OM50G is a new generation of IP telephone switch designed for small and micro enterprises or enterprise branches. It supports operators' IMS access, integrates telephone, fax, recording, customer management, mobile extension, recording and rewriting, and creates an integrated communication experience for users.

Details：
The user holds a card (13.56M RF card, ID card, CPU card) or makes phone calls through the campus IC card.