what is a common interface slot ?

what is a common interface slot ? common interface slot Insert a Common Interface module into this slot 4 Common Interface 2 Insert a Common Interface module into this common interface slot airtel The Common Interface connector is an industry standard PCMCIA slot This The domain of this system is the Common Interface CA Module to Host connection

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common slot SAMSUNG-COMMON-INTERFACE-ADAPTER-CI-MODULE-5V-ONLY-3709-001791 SAMSUNG-COMMON - $ FOR SALE! Переходник 5 находится в новом состоянии  The Keysight E7770A common interface unit provides a bidirectional intermediate frequency interface to the device under test by up- or