Line card
Nowadays, Line card is a topic that has captured the attention of many people around the world. From its impact on society to its ramifications on popular culture, Line card has proven to be a topic of continued interest and relevance. In this article, we will explore the different facets of Line card and how it has made its mark on various areas of modern life. From its origins to its current evolution, Line card has been the subject of debate, analysis and reflection. Join us on this tour of Line card and discover its importance in today's world.
A line card or digital line card is a modular electronic circuit designed to fit on a separate printed circuit board (PCB) and interface with a telecommunications access network.[1]
A line card typically interfaces with a twisted pair cable of a plain old telephone service (POTS) local loop to the public switched telephone network (PSTN). Telephone line cards perform multiple tasks, such as analog-to-digital and digital-to-analog conversion of voice, off-hook detection, ring supervision, line integrity tests, and other BORSCHT functions. In some telephone exchange designs, the line cards generate ringing current and decode DTMF signals. The line card in a subscriber loop carrier is called a subscriber line interface card (SLIC).[2][3]
A line card can terminate a line supporting voice POTS service, ISDN service, DSL service, or proprietary ones. Some line cards are capable of terminating more than one type of service.[3]
Since an access network element is usually intended to interface many users (typically a few thousand), some exchanges have multiple line terminations per card. Likewise, one network element can have many line cards.
See also
References
- ^ "line card Definition from PC Magazine Encyclopedia". Pcmag.com. Retrieved 2014-02-19.
- ^ "Line Card". Cscprinters.com. Retrieved 2014-02-19.
- ^ a b "What is line card? - Definition from WhatIs.com". Searchitchannel.techtarget.com. Retrieved 2014-02-19.