VoIP technology , which allows the transformation of voice into data and communication via the internet , is increasingly used by companies due to the numerous benefits it offers, including reduced telephone costs, advanced resources that favor team management and quality control in customer service .
Analog telephony delivers quality calls to its users, and one of the challenges usa phone number lists imposed on voice over internet protocol was maintaining the consistency of conventional telephony in calls. VoIP calls require high-speed, high-quality broadband, and with the intense flow of data exchange, a policy that determines traffic priority is necessary.
QoS (Quality of Service) is a set of recommendations and standards for prioritizing network traffic, applicable to different environments, so that VoIP calls are made with quality, without interruptions, drops and interference. Since VoIP calls depend on the internet and the IP network, QoS is necessary so that employees and customers have a good, error-free experience, even when network traffic intensifies.
According to Microsoft, Policy-Based QoS is the network bandwidth management tool that provides network control based on applications, users, and computers. The challenge is to deliver predictable and cost-effective network performance levels to latency-sensitive applications such as VoIP (voice over IP) and video streaming.
"You can create QoS policies that define the priority of network traffic with a Differentiated Services DSCP (Code Point) value assigned to different types of network traffic. For example, you can configure routers to place packets with specific DSCP values into one of three queues: high priority, best effort, or less than best effort.
Critical network traffic, which is in the high-priority queue, is given preference over other traffic. You can also limit an application's outbound network traffic by specifying a rate limit in the QoS Policy. With the Quality of Service Policy, you can configure specific standards for the network, which cannot always be configured on routers.
Cisco, a reference in telephony technology, leader in the domestic networking market, and prominent in the business market, indicates that for VoIP transmissions to be intelligible to the receiver, voice packets must not be discarded, delayed excessively or suffer variable transmission delays. In this sense, it indicates the standards below :