Default Conﬁguration

Table 2 lists the factory defaults for ports on the EtherSpeed module.

Table 2. Factory defaults for EtherSpeed 10/100 Mb/s ports

Parameter		Factory default		Conﬁgurable options

Switching mode		Transparent		Transparent
Spanning Tree Protocol		None		None, IEEE
Path cost		16		1–65535
Port partition state		Enabled		Enabled, Disabled
Filters		Disabled		Enabled, Disabled
PMD type		•	10BASE-TX	None
		•	100BASE-FX
Port speed
•	10BASE-TX	10 Mb/s		None
•	100BASE-FX	100 Mb/s (autosensing)		None
Half/full duplex		Full Duplex		Half/full duplex
Bridge group		2		2–32
Priority		128		0-255

Fiber Port Requirements

Two SC ﬁber optic connectors (see Figure 3) on the EtherSpeed module provide 100BASE-FX

100 Mb/s ports. The 100BASE-FX ports have the following options and requirements:

•Cable Options

—62.5-micron multimode ﬁber optic

—50/125-micron multimode ﬁber optic

•Maximum ﬁber cable length

—380 meters (1246.4 feet) when operating in half-duplex mode

—128 meters (419.84 feet) if one of the FX ports is connected to a repeater that has FX ports and TX ports

6539

Figure 3. SC connector

00BASE-FX specifications

Nortel Networks 00BASE-FX is a well-known fiber optic technology that played a pivotal role in the evolution of networking during the late 20th century. As a part of the 100BASE-FX standard, it utilizes multimode fiber optic cables to achieve high-speed data transmission essential for modern telecommunications. The standard amount of bandwidth operates at 100 Mbps, serving as a reliable backbone for various networks.

One of the main features of 00BASE-FX is its usage of light as a transmission medium. This medium significantly benefits data integrity and transmission distance compared to traditional copper cables. With 00BASE-FX, the maximum transmission distance can reach up to 2 kilometers (about 6,600 feet) using multimode fiber, which is particularly advantageous in campus environments or large buildings.

Technologically, 00BASE-FX employs a dual-fiber system where two strands of fiber are utilized—one for sending data and the other for receiving it. This approach reduces the risk of signal degradation and enhances overall performance. The technology operates over an 850 nm wavelength, and its use of inexpensive multimode fibers helps to minimize infrastructure costs while maximizing performance.

Another notable characteristic of 00BASE-FX is its compatibility with various networking protocols and devices. This versatility allows for seamless integration into existing network topologies, ensuring that organizations can leverage their current investments while upgrading their technology. Furthermore, 00BASE-FX is an ideal choice for local area networks (LANs) that require robust bandwidth and low latency to support high-demand applications including video conferencing, VoIP, and data-intensive tasks.

In summary, Nortel Networks 00BASE-FX plays a significant role in fiber optic communications, providing organizations with high-speed, reliable networking solutions. Its combination of high data rates, long transmission distances, and compatibility with existing systems positions it as a robust option for modern telecommunications needs. As industries continue to evolve, technologies like 00BASE-FX remain fundamental in supporting the increasing demand for faster and more efficient data transmission. Its legacy is reflected in the ongoing advancement and adoption of fiber optic technologies across the globe.