VG-AnyLan (VG =Voice Grade) is a joint development of AT&T Microelectronics, Hewlett-Packard, and IBM and is standardized by the newly created IEEE. VG-AnyLAN is a star topology. The maximum amount of repeaters (HUBs) in one network is five. The maximum length of a complete network depends on the. Overview. VG-AnyLAN is a new network technology, defined by the IEEE standard, for transmitting Ethernet/IEEE and token ring/IEEE

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All high-priority requests will be serviced before the normal priority requests. Demand priority is a methode where the station send a request demand to the HUB to send anh across the network. Transmission System — What is an Transmission System? What is Data Transmission?

Retrieved from ” https: This scheme may seem to be cumbersome and inefficient, but it is not. All of the hubs in the network negotiate among themselves and schedule a time when they will allow the transmission to take place. Although it is completely different from Ethernet and Token Ring access protocols, the details are all taken care of in the software drivers that the customer loads on workstations and servers.



This is called Link Training. Each HUB maintains a list of high- and normal-priority requests.

These hubs contained the rotating token that never left the hub itself. Everything is now ready for transmission. If Category 5 is used, the ayn are feet. This saves the customer the expense of rewiring the building – which in many cases can be far higher than the cost of the equipment used to make a VG-AnyLAN network.

VG-AnyLan in The Network Encyclopedia

The hubs are intelligent devices and act as a “traffic cop” for devices wishing to transmit data to the network. The first faction argued that, since IEEE What is a Optical Fibers?

Cables are discussed below. This presented a problem with early installations that borrowed one unused twisted pair for telephone traffic but those installations were uncommon.

Gateways — What is Gateway? The maximum amount of repeaters HUBs in one network is five.

What is Bit Error? Another faction wanted to change to a polling architecture from the hub they called it ” Demand Priority Protocol ” in order anny maintain the 10BASE-T distances, and also to make it a deterministic protocol.

When the hub gets such a request, it will allow the “High Priority” traffic to be sent before any of the lower priority traffic. Fast Ethernet switches were not commonplace at first because of high cost and limited availability so, initially, VG had a significant performance advantage.


BaseVG – Wikipedia

Because the token stayed within the hub, it did not have to traverse long cables going to every node as in ARCNET and Token Ring therefore becoming faster than those other deterministic networking standards and being less susceptible to cabling problems, network card failures, and line interference.

Unsourced material may be challenged and removed. Transmission Modes – What are the different Transmission Modes? The user of the network never even knows that it is happening, and doesn’t have to do any special setup to make it work. Mobile Broadband What is AppleTalk? What is the difference between Wi-Fi vs.

If a device has an urgent message to send, it can request High Priority access from the hub. Ethernet Expansion What is Ethernet Frame? Ethernet family of local area network technologies. What is the difference between computer networks and network communications?