Troubleshooting

Cabling Problems

Improper cabling is the primary cause of most network problems, particularly for 100Base-TX and 100Base-FX networks. Use only the specified twisted-pair or fiber optic cables to avoid most cabling problems.

•Flat telephone extension cables, or Category 3 wires, are not the same as Category 5 twisted-pair cables and will not function on Fast Ethernet networks.

•There is a wiring problem if the Link/Act LED does not illuminate when the RJ-45 plug from a workstation is inserted into the port jack. Correct the break in the cable or replace the cable before proceeding.

•If a workstation (workstation A) does not function while workstations con- nected to other ports on the CenturySwitch operate normally, remove an RJ- 45 plug from a functioning port with a functioning workstation (workstation B) and insert it into the suspect port. If workstation B still works, the prob- lem may be in workstation A or in the wiring. However, if workstation B does not work, the CenturySwitch may have a defective port. Even if you suspect a defective port, continue testing. Improperly wired workstations may appear functional, especially if they are located near the switch. Some- times a port connected to an improperly wired workstation functions mar- ginally while another port does not work at all.

•Once you have established that the CenturySwitch is working properly, check all wiring between it and the malfunctioning workstation. Be sure that the transmit (TX) and receive (RX) cables are not crossed. The transmit cable from the worksta- tion should connect to the receive connector of the switch and the transmit cable from the switch should connect to the receive connector of the workstation.

•Use a continuity checker to ensure that wires do not have any breaks. By shorting together the two wires at the end of a pair, you can use the continuity checker at the other end. Also check that there are no shorts between wires.

Workstation Problems

Most non-cabling problems result from improper configuration of the network interface card (NIC) and its corresponding driver. Observe the following points:

•Like other add-on cards in the workstation or server, the NIC must have a unique memory address, I/O address and interrupt. The settings on a particular card must not conflict with the settings on any other card in the same station. Refer to the user’s manuals of your NIC, computer and network operating system to determine the proper configuration.

12 User Guide

3508-11 specifications

METRObility Optical Systems 3508-11 is a cutting-edge optical network platform designed for high-performance telecommunications and data transmission. This system is particularly tailored to meet the demands of modern telecommunications environments, providing flexibility, reliability, and superior efficiency.

One of the main features of the 3508-11 is its advanced optical line terminal (OLT) capabilities. This platform supports a variety of optical protocols, ensuring compatibility with multiple network architectures. Its modular design allows easy upgrades and expansions, making it an ideal choice for businesses anticipating growth or changes in their network demands.

The 3508-11 incorporates state-of-the-art technologies such as Dense Wavelength Division Multiplexing (DWDM), which significantly increases the data capacity over existing fiber infrastructure. This technology enables the transmission of multiple signals simultaneously on the same fiber, allowing for improved bandwidth utilization without the need for additional physical infrastructure.

Another notable characteristic of the METRObility 3508-11 is its robust network management capabilities. Utilizing a comprehensive software suite, the system provides real-time monitoring, diagnostics, and management of the network, streamlining operation and maintenance. This feature ensures network administrators can quickly identify and resolve issues, enhancing overall service quality.

Additionally, the system is designed with built-in redundancy and failover mechanisms to ensure maximum uptime. This reliability is crucial for service providers that need to maintain continuous operations, even during equipment failures or maintenance periods. The 3508-11 supports both active and standby modes, providing seamless transitions should a failure occur.

Energy efficiency is another significant aspect of the 3508-11. The system has been engineered to minimize power consumption while maintaining high performance, meeting the increasing demand for sustainable technology solutions in the telecommunications sector.

In summary, METRObility Optical Systems 3508-11 stands out as a powerful optical network solution, leveraging advanced technologies such as DWDM and robust management features to deliver unmatched performance. Its flexibility, reliability, and high energy efficiency cater to a wide array of telecommunications needs, making it a prime choice for operators looking to enhance their network infrastructure.