1. An access technology that allows voice and high-speed data to be sent simultaneously over local exchange service copper facilities; the technology supports data rates of up to
1. 544 Mb/s when receiving data (downstream rate) and up to 256 kb/s when sending data (upstream rate).
2. A modem technology that provides enhanced and affordable access to the Internet, live… (Read More →)

An encryption system that utilizes two keys, one called a public key (which is known to both the sender and the recipient of encrypted data), and the other, called a private key (known only to the individual sending the data).
Note: Data are encrypted with the private key and decrypted with the public key. Asymmetric encryption allows for the secure… (Read More →)

Synonym unbalanced modulator.

A data communications system that uses asynchronous operation.
Note: The time spacing between successive data characters or blocks may be of arbitrary duration. Synonym start-stop system. [T
1. X1]

A multiplexed transmission system in which the rates of the carrier and its tributaries are not traceable to the same master clocking source.
Note: In this type of system, extra signal elements are usually appended to the individual tributary signals for the purpose of interleaving them at a rate consistent with the carrier rate. [T
1. X1]

A network in which the clocks do not need to be synchronous or mesochronous. Synonym nonsynchronous network.

1. A sequence of operations in which operations are executed out of time coincidence with any event.
2. An operation that occurs without a regular or predictable time relationship to a specified event; e.g., the calling of an error diagnostic routine that may receive control at any time during the execution of a computer program. Synonym asynchronous working.

Time-division multiplexing in which asynchronous transmission is used.

A high-speed multiplexing and switching method utilizing fixed-length cells of 53 octets to support multiple types of traffic.
Note: ATM, specified in international standards, is asynchronous in the sense that cells carrying user data need not be periodic.

Data transmission in which the instant that each character, or block of characters, starts is arbitrary; once started, the time of occurrence of each signal representing a bit within the character, or block, has the same relationship to significant instants of a fixed time frame.