LYCOS RETRIEVER 
Token Ring
built 671 days ago
The node side of the Token Ring adapter cable is a standard DB-9 male connector using only pins 1, 5, 6, & 9 (the outside narrow edge pins). Assembling this end of the cable is the same as installing any DB type connector. Make sure you follow the wiring diagram and connect the "Christmas Pair" (Red & Green) to pins 1 & 6 respectively and the "Halloween Pair" (Black & Orange ) to pins 5 & 9 respectively. You will need to use a pin crimp tool to install the male pins. Be sure to crimp the rear fingers of the pin around the insulation of the stripped wire for strain relief and crimp the front fingers around the conductor for a positive connection. After all four pins have been crimped on and inspected, use the Insertion/Extraction tool to insert the pins into the DB-9 connector as per the color code diagram.
Source:
Targeted at companies that have a mixture of Ethernet, Fast Ethernet and Token Ring network topologies, the ZNYX VLAN adapter technology is an ideal solution for enterprises powered with Cisco switches. Instead of operating at 16 or 4 Mbps, the ISL/TRISL technology will support network links operating at 100 Mbps or more.
Source:
Token Ring networks employ several mechanisms for detecting and compensating for network faults. One station in the Token Ring network, for example, is selected to be the active monitor. This station, which potentially can be any station on the network, acts as a centralized source of timing information for other ring stations and performs a variety of ring- maintenance functions. One of these functions is the removal of continuously circulating frames from the ring. When a sending device fails, its frame may continue to circle the ring. This can prevent other stations from transmitting their own frames and essentially can lock up the network.
Source:
The main advantage of Token Ring over Ethernet is that Token Ring solves the problem of packet collisions. The solution is implemented by allowing stations to transmit data by taking turns in their use of the transmission link. The Host that has the ability to transmit data is determined by the use of a metaphorical Token that is sent around the link connecting all the Host computers. When a Host wants to transmit data, the Token is taken off the link and then that Host can transmit its data. When the Host that sent the data finishes it takes the data off the link and places the Token back on the link so that another Host can gain access to the Token in order to send data. The release of the Token is done in two ways depending on the ring rate.
Source:
On a Token Ring network, a packet can be broadcast; that is, sent to more than one device or to more than one ring. These packets have a special destination address called a broadcast address (when addressed to all stations on a ring) or a group address (when addressed to multiple pre-defined nodes). A broadcast packet has a destination address that allows every node on the network to receive the packet. A group packet is similar to a broadcast packet except that, instead of every single node receiving the packet, only a specific pre-defined class of nodes will receive the packet.
Source:
If the AM notices any continuously rotating tokens with a priority greater than zero, it will remove them from the ring and issues a new token with a priority of zero. It is possible that a malfunctioning Network Interface Card has issued a priority token, and there are no NICs with a priority high enough to make use of it. What results is no one can transmit unless the priority level of the token is less than or equal to their priority.
Source:
MORE ABOUT
Token Ring