Appendix E Components in LANE Services

Communication on an Emulated LAN

It is the LEC in an ATM device that will perform most of the work of LAN emulation. To do this it must join an ELAN.

Discovering the ATM address of the LES

Before a LEC can join an ELAN, it typically gets the ATM address of the LES from the LECS. The LECS decides which LES to direct a LEC to, on the basis of the information that the LEC gives it. For example, the LEC may provide the name of the ELAN it expects to join. Alternatively, the LECS may be configured to associate a particular LEC with a specific ELAN.

Discovering the ATM address of another LEC

Every LEC has one or more LAN addresses (for example, MAC address) and an ATM address associated with it. When the network operating system passes a frame to a LEC to transmit, the LEC checks whether it already has a connection set up to that frame's LAN destination address. If there is no existing connection, the LEC must discover the ATM address for that destination end-station, signal to the network for a connection, and then transmit the data.

To discover an ATM address, the LEC consults its list of ATM stations that it has communicated with. If the LEC cannot find the address it requires from its own list, it will communicate with the LES for the required address.

When a LEC needs an ATM address, it sends a LANE ARP (Address Resolution Protocol) request to the LES. If the LES knows the ATM address, it sends it to the LEC. If it does not know the ATM address, the LES may forward the address request to any LECs that are registered with it so that they can respond directly to the LES. The LES will then forward the response to the LEC.

Setting up the connection

When the LEC has discovered the ATM address of the required LEC, it signals to the ATM network for a Virtual Circuit Connection (VCC) to that LEC.

Transmitting the data

When the VCC is set up, the LEC transmits its data through the ATM network to the destination LEC.

298

Avaya M770 ATM Switch User’s Guide

Page 317 Page 319
Page 318
Image 318
Avaya M770 manual Communication on an Emulated LAN, Discovering the ATM address of the LES, Setting up the connection
Page 317 Page 319

M770 specifications

The Avaya M770 is a highly advanced media processor that is part of Avaya's robust suite of communication solutions designed for enterprise environments. This powerful device caters to the needs of modern businesses, providing an efficient platform for managing voice, video, and data communications.

One of the standout features of the Avaya M770 is its high-density processing capability. The device can handle a significant volume of calls concurrently, which makes it an ideal solution for large organizations requiring a reliable communication backbone. The M770 supports a variety of codecs, ensuring high-quality audio and video transmission, which is pivotal for maintaining clarity during communication.

Incorporating cutting-edge technologies, the Avaya M770 is built upon a scalable architecture that allows for easy expansion as business needs evolve. This scalability means organizations do not have to invest in new equipment every time they grow; they can simply add additional resources to the existing system. This makes the M770 a cost-effective solution in the long run.

The M770 also boasts advanced security features, essential for protecting sensitive communications within a business. It employs encryption protocols to safeguard data and voice transmissions, ensuring that corporate information remains secure from potential cyber threats. This focus on security is increasingly critical in today's interconnected world, where data breaches can have devastating consequences.

Another notable characteristic of the Avaya M770 is its integration capabilities. The device can seamlessly connect with Avaya’s suite of applications and third-party solutions, enabling businesses to create a unified communications environment tailored to their specific needs. This interoperability allows for a more streamlined workflow, enhancing productivity within the organization.

Furthermore, the M770 features intuitive management tools that simplify the administration of telephony systems. With a user-friendly interface, IT administrators can easily monitor performance, manage resources, and troubleshoot issues. This ease of use reduces the time and effort needed for system management, allowing IT teams to focus on strategic initiatives.

In conclusion, the Avaya M770 is a comprehensive media processing solution that combines scalability, security, and ease of integration to meet the demands of contemporary enterprises. With its ability to support high-density communications and its advanced management capabilities, it serves as a critical asset for businesses looking to enhance their communication infrastructure.
Top Page Image Contents