136APPENDIX : GLOSSARY

OOBMAN Out-of-band Manager—OOBMan is an application that runs on 3Com Windows NT components of the CommWorks IP Telephony platform.

It is designed to allow a user to dial into an NT device, using a terminal emulation program such as Hyperterminal, and view or modify various configuration information on that machine.

OS Operating System—A software program that controls and manages the operations of a computer system.

OOF Out-of-frame—OOF conditions occurs in a T1 transmission when two or more out of four consecutive framing bits are in error.

OOS Out-of-service—The term used when a module or card is not functioning. It could be because VoIP has taken it OOS due to errors, or because the card or module has been removed from the chassis.

PCI Peripheral Component Interconnect—Designed by Intel. It is a 32-bit local bus on a PC to transfer data between the CPU and the peripherals.

PCM Pulse Code Modulation—Technique for converting an analog signal to a digital signal.

POTS Plain Old Telephone System—Standard telephone service used by most residential locations. See PSTN.

PRI Primary Rate Interface—ISDN interface to primary rate access. In the U.S., the Primary Rate Interface is split into 23 B channels and one 64 Kbps D channel. PRI is delivered over the same physical link as a T1, or 1.55 Mbps link. In Europe, PRI is split into 30 B channels and one 64 k bit/second D channel and is delivered over the same physical link as an E1.

PSI Power Supply Interface—The card on the chassis that controls the power for the chassis.

PSTN Public Switched Telephone Network—The analog dial-tone-type telephone networks and services in place worldwide, with transmission rates up to 52Kbps. In contrast, telephone services based on digital communications lines, such as ISDN, have higher speeds and bandwidths. The POTS networks also called the public switched telephone network (PSTN).

PSU Power Supply Unit—This unit is part of the Total Control chassis. It controls the power to the chassis. The PSU can be either AC or DC power with 35A, 45A, 70A, or 130A ratings.

QOS Quality of Service—An indicator of the performance of a transmission system on the Internet and other networks. QoS is measured in transmission rate, error rates, latency, and other characteristics, and can to some extent be guaranteed to a customer in advance.

RAS Remote Access Service—Remote access is sending and receiving data to and from a computer or controlling computer with terminals or PCs connected through phone/communications links. A remoter access service provides this function.

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3Com 5210 manual Appendix Glossary
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5210 specifications

The 3Com 5210 is a robust and reliable networking switch designed to meet the demands of modern IT environments. Aimed at businesses looking for a balance of performance and manageable costs, the 5210 series provides essential features that cater to the needs of various industries.

One of the standout features of the 3Com 5210 is its support for high-performance switching. With a switching capacity of up to 104 Gbps, the device is built to handle a significant amount of data traffic, making it suitable for environments with heavy workloads. Coupled with a forwarding rate of 77.4 million packets per second, the 5210 guarantees minimal latency, ensuring that data is transmitted swiftly and efficiently across the network.

The 5210 switch supports Layer 2 and Layer 3 switching, allowing for flexibility in network design and operational efficiency. The Layer 3 functionality enables IP routing, facilitating better traffic management and segmentation across IP networks. This is particularly useful for organizations looking to optimize their network performance and ensure efficient load distribution.

In terms of security, the 3Com 5210 incorporates advanced features designed to protect enterprise networks from potential threats. The switch supports VLANs, which help in segmenting network traffic, along with port security features to minimize unauthorized access. Moreover, it provides access control lists (ACLs) that allow administrators to define rules for data transmission, enhancing overall security.

The device is also equipped with Quality of Service (QoS) capabilities, which prioritize different types of traffic to ensure that critical applications receive the bandwidth they require. This is crucial for businesses that rely on voice over IP or video conferencing, as it ensures clear and uninterrupted communication.

Management and monitoring are simplified via a user-friendly web interface, allowing network administrators to configure settings, monitor traffic, and troubleshoot issues easily. The switch supports Simple Network Management Protocol (SNMP), enabling remote management and ensuring that IT teams can respond to problems without being physically present at the location.

The 3Com 5210 is characterized by its reliability and durability. Built with robust hardware components, the switch is designed for continuous operation, suitable for both small offices and larger enterprise networks. With its combination of performance, security, and manageability, the 3Com 5210 stands out as a valuable asset for organizations aiming to enhance their networking capabilities.
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