Chapter 8

Permanent Virtual Connections (PVCs and PVPs)

This chapter describes how to use the command-line interface to manage PVC connections in an Avaya M770 ATM Switch. For information about how to access and use the Avaya M770 ATM Switch command-line interface, see Chapter 3, “How to Use the Command-line Interface”.

Managing Permanent Virtual Connections (PVCs and PVPs)

Managing PVC connections

Not all ATM equipment currently supports UNI signalling. Therefore, you may need to manually establish a virtual circuit to make a connection between two ATM endpoints over an ATM network. These connections are referred to as Permanent Virtual Circuits (PVCs).

A PVC is a concatenation of Virtual Circuit Links (VCLs), where each VCL is bi- directional.

Figure 8.1 illustrates the terms VCL and PVC.

Figure 8.1 A breakdown of a PVC connection

Port A

 

Port B

Port C

 

 

Port D

Transmit

 

 

 

Receive

Transmit

 

 

 

 

 

 

 

 

 

 

 

 

VCL A

 

PVC connection

 

 

VCL B

 

 

 

 

 

 

 

Receive

 

 

 

 

Receive

 

 

Transmit

 

 

 

 

 

 

 

 

 

 

Switch 1

 

Switch 2

 

 

 

 

Switch 3

Figure 8.1 shows a PVC, consisting of two VCLs that span three switches. A VCL is a bi-directional link between two entities, such as two switches or a switch and an end-station. With respect to switch 2, VCL A is identified by specifying the physical port (port B) and the VPI/VCI used at that port. Similarly, with respect to switch 1, VCL A is identified by specifying the physical port (port A) and the VPI/VCI used at that port. Note that the VPI/VCI in the same switch, is the same at both ports. The PVC connection could be between 2 ports on the same module or between 2 modules on the same switch (through the backplane). This means that port B and port C can be on one module or on 2 different modules on the same switch.

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Avaya M770 manual Managing Permanent Virtual Connections PVCs and PVPs, Managing PVC connections

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.