inverse multiplexor

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inverse multiplexor

In communications, a device that breaks up a high-speed transmission into several low-speed transmissions, and vice versa. It is used to transmit LAN and videoconferencing traffic over lower-speed digital channels. For example, to transmit Ethernet over a T3 link, the 10 Mbps Ethernet channel would be inverse multiplexed into multiple 64 Kbps channels of the T3 line. A 336 Kbps videoconferencing transmission could be split into six 56 Kbps channels to transmit over a Switched 56 service. Contrast with multiplexor.
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The next generation of IMUX technology is built around the emerging multilink PPP and multilink frame relay standards that allow a direct connection to a service provider's high-speed router or switch.
At the heart of the system is the iMux, a newly developed IP-to-ASI gateway, which performs synchronization, conversion and multiplexing of IP streams received by the Gigabit Ethernet interface into MPEG streams transmitted over DVB-ASI interfaces.
According to IDC, the influencing factors driving IMUX solutions are lack of T3/E3 connections or services, the need for reasonably priced higher- bandwidth access, and the need for standards compliance.
By making use of the newly developed iMUX IP-to-ASI gateway, the solution can be used in combination with today's cable set-top boxes, yet is easily upgradeable to an end-to-end IP-based system using IP-based set-top boxes.
The Gateway provides internal bonding (BRI module) saving the expense of an external Imux and providing a simple system setup.
This product not only adds T1 IMUX functionality to the ATLAS 550, it also puts us a step ahead of the competition by including this functionality in a multi-function device," said Tim Saunders, ADTRAN vice president of product management, Enterprise Networks Division.
Enhanced Features Include Internal IMUX and Support for 768K for
Development of an additional IMUX offering is also in progress.
The Vision 2500 is a fully-featured rollabout unit incorporating plug and play technology and utilising TANDBERG's innovative SoftMux, a software IMUX implementation designed to increase reliability, ease of use and cost- effectiveness.
Furthermore, for environments where a DSLAM-based DSL bonding solution is preferred, Netopia also offers SDSL and IDSL routers and DSUs that support Copper Mountain Networks' IMUX technology.
The IMUX technology gives Jato the capability to eventually offer DSL PLUS at speeds up to 12 Mbps, more than 400 times the speed of standard 28.