LMDS


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Related to LMDS: MMDS

LMDS

LMDS

(Local Multipoint Distribution Service) A digital wireless transmission system that works in the 28 GHz range in the U.S. and 24-40 GHz overseas. It requires line of sight between transmitter and receiving antenna, which can be from one to four miles apart depending on weather conditions. LMDS provides bandwidth in the OC-1 to OC-12 range, which is considerably greater than other wireless broadband services.

LMDS can be deployed in asymmetric and symmetric configurations. It is designed to provide the "last mile" from a carrier of data services to a large building or complex that is not wired for high-bandwidth communications. In areas without gas or steam pipes or other underground conduits, it is less costly to set up LMDS transceivers on rooftops than to dig up the ground to install optical fiber. See MMDS.


The "Last Mile"
LMDS and similar systems are used to span the last mile to the user's facilities. LMDS transmits at an extremely high data rate, but is limited to from two to four miles. MMDS, which operates at lower frequencies, can span 30 or more miles.
References in periodicals archive ?
In November 2001, Central Texas Communications, a wholly owned subsidiary of the San Angelo-based Central Texas Telephone Cooperative, announced the successful completion of the initial phase of its LMDS rollout in San Angelo and Goldthwaite.
Alcatel LMDS is a fixed broadband wireless network that operates in spectrum bands above 10 GHz and can be quickly deployed, enabling service providers to cost-effectively deliver high speed Internet, data, and voice services to business customers.
The company intends through its wholly owned subsidiary LMDS Communications, Inc.
According to Nasser Sharabianlou, vice president of marketing, "Vyyo's LMDS Lite provides LMDS operators with an optimal solution for expanding broadband wireless services to the SOHO and residential marketplace.
LMDS is a broadband fixed wireless point-to-multipoint communications system that uses a small unobtrusive dish at the customer-end for reception.
We are very pleased that FLYCOM has chosen Ericsson to provide one of the first LMDS contracts in Latin America," said Fredrik Ambjorn, President of Ericsson Colombia.
The company expects two additional LMDS system installations to start in 1999 and the rest of the systems to be installed through 2002.
The Nortel Networks Reunion broadband wireless access solution, part of the company's Unified Networks(C) offerings, is a digital ATM-based point to multipoint technology operating from 24-gigahertz (GHz) to 42-GHz and delivering high-speed, high-capacity voice, data, Internet and video services for LMDS operators targeting business customers.
Scandinavia is regarded as a very important reference market by the whole LMDS industry.
Where LMDS is seen by many operators in Europe as an interim step to the buildout of fiber-based access infrastructure," said Scott Clavenna, Senior Analyst at Pioneer Consulting, "in the Asia market LMDS will remain a lasting solution because of the investment required to build fiber networks in many underdeveloped areas within the Asia-Pacific region.
The Goldthwaite, Texas-based competitive carrier is using its LMDS spectrum to deliver both broadband data and integrated voice services to its business customers.
LMDS services use microwave signals to transport high-speed data, voice and video to and from a single point in a cell to multiple points in that cell.