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This type of on-hook/off-hook supervision was in use in step-by-step systems as well as electronic switching systems in North America for many decades. [2] Disconnect supervision signals the called terminal device, typically an automated customer premises equipment, that the remote calling party has hung up. [3]
An analogue modem to receive data calls for remote diagnostics. A battery backed real-time clock and memory to store the time and type of fault events like bit errors. A 25-pin RS232 connector for local access to the SMAC card's diagnostic logs. A 2-digit 7-segment display and buttons, which forms a basic MMI, for an engineer without a terminal.
A concentrator is a device that concentrates traffic, be it remote or co-located with the switch. An off-hook condition represents a circuit that is in use, e.g., when a telephone call is in progress. An on-hook condition represents an idle circuit, i.e. no telephone call is in progress.
General Motors, and other automobile manufacturers, have also begun using side-post battery terminals, which consist of two recessed female 3/8" threads (SAE 3/8-16) into which bolts or various battery terminal adapters are to be attached. These side posts are of the same size and do not prevent incorrect polarity connections.
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Typical POST screen (AMI BIOS) Typical UEFI-compliant BIOS POST screen (Phoenix Technologies BIOS) Summary screen after POST and before booting an operating system (AMI BIOS) A power-on self-test ( POST ) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on.
A binding post, colored red, which usually indicates a positive terminal. Two insulated, color-coded binding posts at the bottom center of a historical signal generator; modern devices often have bandwidths exceeding the utility of such connectors Adapter between five-way binding posts and a male BNC connector Uninsulated binding posts on a loudspeaker connected to banana plugs Small black ...