telephone
An optical line termination (OLT), is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions: - To perform conversion between the electrical signals used by the service provider's equipment and the fiber optic signals used by the passive optical network. - To coordinate the multiplexing between the conversion devices on the other end of that network (called either optical network terminals or optical network units).
A write head is the part of an electromechanical device which converts electrical signals into digital or analogue information stored on a magnetic or optical medium.
telephone
No, its not an optical storage device.
It is not an optical device. C D ROM or DVD are optical devices. Whereas a digital memory card is solid state device.
Light pen is a mechanical or optical device? i don't know answer for this
modem is the device that carries digital signals
An Electronic Device
magnetic storage device
CD-R
depends on the purpose of the device
Input device