HALF-DUPLEX Network, Bit Rule | Transition Networks SSETF10XX-200

HALF-DUPLEX NETWORK

512-Bit Rule

In a half-duplex network, the maximum cable lengths are determined by the round trip delay limitations of each Fast Ethernet™ collision domain. (A collision domain is the longest path between any two terminal devices, e.g. a terminal, switch, or router.)

The 512-Bit Rule determines the maximum length of cable permitted by calculating the round-trip delay in bit-times (BT) of a particular collision domain. If the result is less than or equal to 512 BT, the path is good.

To calculate the round-trip delay for a collision domain:

1.	Find the collision domain, i.e. the longest	Class I hub	140 BT
	path between any two terminal devices	Class II hub	92 BT
	(e.g., terminal, switch, and/or router).	terminal/router	50 BT
2.	Calculate the round-trip delay in bit-times	1 meter TP cable	1.11 BT
	for each length of cable.	1 meter fiber cable	1 BT
4.	Determine the bit-time values for each	Fast Ethernet switch	50 BT
	device (see table to the right).	SSETF10xx-200	12 BT
3.	Add the bit-time values for each length of
3.	Add the bit-time values for each length of
	cable and the bit-times for each device.

NOTE: The 512-Bit Rule applies separately to each collision domain.

The example below illustrates a collision domain bound by a router on one end and a terminal on the other.

10 meters TP		10 meters TP
= 11.1BT	150 meters fiber = 150BT	= 11.1BT
Switch = 50BT	Class I Hub = 140BT

Terminal

= 50 BT

Media Converter

= 12BT

Since the total of the bit-times in this example is less than 512 (see chart below), the path is good.

Sum of the bit-times for the example collision domain:

Router		=	50.0	BT
10 m TP cable	(10m x 1.11 BT/m)	=	11.1	BT
SSETF101xx-200		=	12.0	BT
150 m fiber cable	(150 m x 1.0 BT/m)	=	150.0	BT
Class I hub		=	140.0	BT
10 m TP cable	(10m x 1.11 BT/m)	=	11.1	BT
Terminal		=	50.0	BT
Total		=	424.2	BT

SSETF10xx-200

FAULT ISOLATION and CORRECTION

If the Media Converter fails, isolate and correct the fault by determining the answers to the following questions and then taking the indicated action:

1.Is the P(o)W(e)R LED on the Media Converter illuminated?

•Is the power adapter the proper type of voltage and cycle frequency for AC outlet?

•Is the power adapter properly installed in the Media Converter and in the outlet?

•Does the grounded AC outlet provide power?

•Contact Technical Support: US/Canada: 1-800-260-1312,

International: 00-1-952-941-7600.

YES

•Proceed to step 2.

2.Is the LKC LED illuminated?

•Check the twisted pair cables for proper connection.

•Contact Technical Support: US/Canada: 1-800-260-1312,

International: 00-1-952-941-7600.

YES

•Proceed to step 3.

3.Is the LKF LED illuminated?

•Check the fiber cables for proper connection.

•Verify that the TX and RX cables on the Media Converter are connected to the RX and TX ports, respectively, on the other device.

•Contact Technical Support: US/Canada: 1-800-260-1312,

International: 00-1-952-941-7600.

YES

•Proceed to step 4.

4.Is the 100 LED illuminated?

•The Media Converter has selected 10 Mb/s operation. If this is not the correct speed, disconnect and reconnect the 10/100Base-TX cable to restart the initialization process.

•Proceed to step 5.

YES - SLOWLY FLASHING

•The Media Converter is selecting between 10 Mb/s and 100 Mb/s speed or one or both of the links is down. If persistent, disconnect and reconnect either cable to restart the initialization process.

•Proceed to step 5.

YES

•The Media Converter has selected 100 Mb/s operation. If this is not the correct speed, disconnect and reconnect the 10/100Base-TX cable to restart the initialization process.

•Proceed to step 5.

techsupport@transition.com -- Select the “Transition Now” Link for a Live Web Chat

8 Tech Support: 800-260-1312International: 952-941-76007am-6pm CST (GMT-6:00)

SSETF10XX-200 specifications

The Transition Networks SSETF10XX-200 is a versatile media converter designed to facilitate the seamless integration of fiber optic and copper networking environments. This device stands out as an essential tool for businesses aiming to extend their network capabilities while maintaining reliability and performance. The SSETF10XX-200 is particularly adept at converting 10/100/1000 Mbps Ethernet signals over both fiber and copper, providing flexibility for various networking setups.

One of the key features of the SSETF10XX-200 is its support for auto-sensing. The media converter automatically detects the network speed and adjusts accordingly, allowing for an effortless transition between different types of Ethernet connections. This capability enhances its usability in diverse network settings, ensuring that users enjoy hassle-free operation without manual intervention.

The SSETF10XX-200 utilizes advanced technologies such as store-and-forward packet switching, which helps optimize data flow and minimize packet loss. This feature is crucial for environments where maintaining the integrity of data transmission is vital, such as in multimedia applications or real-time communications. Moreover, the media converter can handle both half-duplex and full-duplex modes, accommodating varied networking arrangements.

In terms of physical characteristics, the SSETF10XX-200 boasts a compact design that allows for easy installation in various locations, including data centers and office environments. It is equipped with LED indicators that offer real-time monitoring of power, link status, and data transmission activity. This visibility simplifies troubleshooting and aids network administrators in managing their systems effectively.

The durability of the SSETF10XX-200 is another notable aspect, as it is built to withstand the rigors of continuous use in demanding settings. Transition Networks has engineered this media converter to comply with stringent environmental standards, ensuring reliable performance even in challenging conditions.

Overall, the Transition Networks SSETF10XX-200 media converter is a robust solution for organizations seeking to enhance their networking capabilities. With its automatic speed detection, packet switching technology, and durable design, it provides an efficient way to bridge the gap between fiber and copper networks, making it an invaluable addition to any organization's infrastructure.