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COM port (DE-9 connector). COM (communication port) [1] [2] is the original, yet still common, name of the serial port interface on PC-compatible computers. It can refer not only to physical ports, but also to emulated ports, such as ports created by Bluetooth or USB adapters.
A serial port typically can only be monitored or transmitted to by one device at a time under the constraints of most operating systems, but a virtual serial port program can create two virtual ports, allowing two separate applications to monitor the same data.
Since the control signals for a serial port can be driven by any digital signal, some applications used the control lines of a serial port to monitor external devices, without exchanging serial data. A common commercial application of this principle was for some models of uninterruptible power supply which used the control lines to signal loss ...
Prepackaged monitors include CPU Utilization Monitor, DNS Monitor, Directory Monitor, Disk Space Monitor, Log File Monitor, Memory Monitor, Network Monitor, Ping Monitor, Port Monitor, Script Monitor, Service Monitor, URL Monitor, URL List Monitor, URL Sequence Monitor, Web Server Monitor, WebLogic Application Server Monitor and threshold values.
"Y" cables may be used to allow using another serial port to monitor all traffic on one direction. A serial line analyzer is a device similar to a logic analyzer but specialized for RS-232's voltage levels, connectors, and, where used, clock signals; it collects, stores, and displays the data and control signals, allowing developers to view ...
An attempt by Apple to deal with cable clutter, by combining five separate cables from computer to monitor. Female port (20-pin) Digital Flat Panel (DFP) Used with the PanelLink digital video protocol. Deprecated. Made obsolete by DVI. 3D model of a UDI connector Unified Display Interface: Proposed to replace both DVI and HDMI.
A composite monitor or composite video monitor is any analog video display that receives input in the form of an analog composite video signal to a defined specification. [1] A composite video signal encodes all information on a single conductor; a composite cable has a single live conductor plus earth.
Display Data Channel (DDC) is a collection of protocols for digital communication between a computer display and a graphics adapter that enable the display to communicate its supported display modes to the adapter and that enable the computer host to adjust monitor parameters, such as brightness and contrast.