MERLIN LEGEND Communications System Release 6.1 | Issue 1 | |
Network Reference | August 1998 | |
Glossary |
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DSL | (Digital Subscriber Line) A Digital Subscriber Line provides | |
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| at a rate sufficient to support ISDN Basic Rate Access. | |
DSS | (Direct Station Selector) | |
| the | |
| telephone used as an operator console. |
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DTE | (data terminal equipment) Equipment that makes the |
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| endpoints in a connection over a data connection; for |
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| example, a data terminal, personal computer, host |
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| computer, or printer. |
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DTMF signaling | ||
| from telephones using the voice transmission path. DTMF | |
signaling provides 12 distinct signals, each representing a dialed digit or character, and each composed of two voiceband frequencies.
E
E&M | Ear and Mouth. Synonomous with analog tie trunk. |
E&M signaling | Trunk supervisory signaling, used between two |
| communications systems, in which signaling information is |
| transferred through |
| and Mouth leads) for analog applications and through two |
| bits for digital applications. See also tie trunk. |
EIA | (Electronic Industries Association) |
| Physical interface, specified by the EIA, that transmits and |
| receives asynchronous data at speeds of up to |
| over cable distances of 50 feet (15 m). |
Electronic | See ESS. |
Switching System |
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endpoint | Final destination in the path of an electrical or |
| telecommunications signal. |
ESF | (extended superframe format) PRI framing format |
| consisting of individual frames of 24 |
| signal bit (193 bits) in a |
ESS | (Electronic Switching System) Class of central office (CO) |
| switching systems developed by Lucent Technologies in |
| which the control functions are performed principally by |
| electronic data processors operating under the direction of |
| a stored program. |
expansion carrier | Carrier added to the control unit when the basic carrier |
| cannot house all of the required modules. Houses a power |
| supply module and up to six additional modules. |
