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A combination of the various pieces of DSX apparatus and its supporting mechanism, including its frame, rack, or other mounting devices.
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Any number of DSX lineups that are connected together to provide DSX functionality.
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Multiple contiguous DSX bays connected together to provide DSX functions.
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A fiber-optic connector developed by the Nippon Electric Group in Japan.
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|Dual-attachment concentrator (DAC)||
An FDDI concentrator that offers two attachments to the FDDI network that are capable of accommodating a dual (counter-rotating) ring.
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|Dual-attachment station (DAS)||
A term used with FDDI networks to denote a station that attaches to both the primary and secondary rings; this makes it capable of serving the dual (counter-rotating) ring. A dual-attachment station has two separate FDDI connectors.
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|Dual-tone multifrequency (DTMF)||
The signal that a touch-tone phone generates when you press a key on it. Each key generates two separate tones, one in a high-frequency group of tones and one from a low-frequency group of tones.
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An optical fiber cable manufactured to be used at two different wavelengths. Single-mode fiber cable that is usable at 1300nm and 1550nm is dual-window fiber. Multimode fiber cable is optimized for 850nm and 1300nm operations and is also dual-window fiber. Also known as double-window fiber.
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(1) A single enclosed raceway for wires or cable. (2) An enclosure in which air is moved.
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(2) Duplex Leads – Also known as shotgun or dual
A double loom, two lengths of cable run together to simultaneously send (TX) and receive (RX) data.
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A two-fiber cable suitable for duplex transmission. Usually two fiber strands surrounded by a common jacket.
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Data transmission in both directions, either one direction at a time (half duplex) or both directions simultaneously (full duplex).
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With respect to a digital transmission, the product of a signal
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