Communication Devices - Dell Inspiron 13z Manual

The following figure shows the size-comparison of PC-cards and
ExpressCards:
PC Card

Communication Devices

An electronic device that can send and receive data on the network is
called a communication device. Communication devices are used on
both ends of a connection. Signals may travel from one device to another
in either analog or digital form. Most communication devices have the
ability to convert digital signals to analog signals or analog signals to
digital signals, so that the signals can be transmitted from one device to
another.
Some of the commonly used communication devices are:
54 mm ExpressCard
(EC 54)
Communication Devices
34 mm ExpressCard
(EC 34)
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