Chapter 7 Managing Module Hardware

Note:

•OC-3 Modules (M15-155F/SF/MS):

In order to provide DEFINITY support, all the OC-3 modules in the chassis must be C/S 2.0 or higher. The C/S of the module can be located on the unit’s box or on the module itself. If the module is already inserted in the M770 switch, type the command summary info from the ATM module’s Command Line Interface to see the C/S version.

•Only ports 1 and 2 can be used by the M-SPS to synchronize its clock. All ATM ports can be used to connect the DEFINITY to the M770 ATM Switch.

•OC-12 Modules (M3-622F/SF):

Currently the DEFINITY does not support OC-12 connections, however the M3- 622 module may be used as backbone links between ATM switches. Only M3- 622 modules with C/S 2.0 or higher can provide clock synchronization to the network or deliver clock to the switch. Newer and older C/S’s of the modules can be mixed in the same chassis, but the older modules will not be synchronized to the rest of the ATM network.

•All ports (of C/S 2.0 modules) can be used by the M-SPS to synchronize its clock.

Managing Packet Discard Thresholds for a Module

There are two packet discard thresholds for each module, called Early Packet Discard (EPD), and Partial Packet Discard (PPD). By default, both thresholds have a set limit (see below) and are enabled.

The M770 ATM Switch uses EPD to discard entire AAL5 frames for UBR traffic (rather than random cells from different frames), when it determines that it is about to become congested. The M770 ATM Switch still passes through the last cell of each AAL5 frame so that end-stations are aware of the discard that has taken place. You can configure a threshold at which the EPD will be invoked. The threshold is a percentage of the overall shared buffer space. The default for EPD is set at 80% of the buffer fill.

PPD works similarly to EPD, but it is generally invoked at higher levels of congestion. The difference is that, while with EPD the M770 ATM Switch can wait for the start of a suitable frame, PPD is involved when congestion is too serious to wait that long. Therefore, packet discarding will start in the middle of the frame. The value for PPD threshold cannot be set by the user. It is higher than the default for EPD. Under normal circumstances, EPD would deal with the congestion before the buffer capacity is reached, and PPD should never be invoked.

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Avaya M770 manual OC-3 Modules M15-155F/SF/MS, Managing Packet Discard Thresholds for a Module
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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.
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