Step 4: Improve the Quality of Service for Unified Communications

The quality of service (QoS) of application Unified Communication has four key steps. Without these four steps, the implementation of Unified Communication will not realize its full potential. In addition to enabling the vro function, QoS has many things to do.

As a user, you must first plan and design the correct QoS for your speech environment at some time. The following are the four key steps:

Step 1: classify voice communication

First, you need to select the best solution to mark the packets that require priority processing.

This classification includes deciding which data streams can pass and which data streams need to wait. In reality, everyone wants their applications to have the highest priority. However, if you do that, you will not have time to do anything else.

QoS is a zero-sum game. In this game, if you get the highest priority, you get the second priority. Because Unified Communication is a real-time and demanding communication, you need to give it the highest priority category.

A recommended mechanism is to verify the endpoint. It is recommended that the IP address of a device be verified on the network. The device is an authorized IP address. Accordingly, the router can also trust the communication priority mark provided by the phone.

In this way, you can protect the network to prevent improper use. Endpoint verification can determine which data packet gets a high priority level and determine which data packet gets the best support.

Before your data packets pass, we recommend that you develop a plan to determine which level of service can be used for communication, how many levels of service are available, and what tags you use for each category. You also need to mirror your priority category to the entire layer-2/layer-3 boundary, and also need to mirror your priority category to your carrier service products.

Step 2: enable the Service class Mechanism

Now let's turn on the mechanisms in the network routers and switches to prioritize Unified Communication. The important service-class (CoS) mechanism is the DiffServ (Service-differentiated structure) Standard for routing infrastructure and the IEEE 802.1p standard for switching infrastructure. You should find that it is easy to change these devices, because CoS can be started only through the vro and switch configuration files.

Step 3: plan and manage bandwidth

Next, you will need to understand, plan, and manage your bandwidth. You will find that DiffServ and IEEE 802.1p are not fully functional QoS mechanisms. They provide different levels of services, but they cannot solve the problem of excessive orders. Therefore, to ensure that the voice quality is not affected, you need other mechanisms to ensure that there is no excess subscription service.

At the same time, to provide a good quality Unified Communication Service, you need to predict the number of simultaneous calls. Then, you also need to assess whether the available bandwidth will support the demand in the plan, or whether you need more bandwidth.

In this regard, finance is an inevitable reality, because your budget may not support your bandwidth in every place. Therefore, you must control the number of users that can access this bandwidth at the same time.

In addition, when there is no bandwidth for a phone call, you will receive the same feedback provided by the public exchange phone. It should be noted that this feedback information can be seen as a "Busy Trunk Line" signal for Unified Communication.

Ip pbx has this built-in function. They know the network structure, and they also have parameters that determine the number of simultaneous voice calls allowed between sites. When the network reaches this limit, the ip pbx may send a busy line signal to the next caller, or transfer the call to another line (like PSTN ).

Step 4: monitor Unified Communication Performance

In this last step, you need to monitor the performance to see if your network provides a high-quality transmission and high-quality voice reproduction for the voice stream. If there is a problem, you need to know the problem before your users are dissatisfied. Because of the special needs of speech, you may need to consider using a new monitoring tool.

1. Topic: QoS service quality
2. Four steps to improve the quality of VoIP services