Knowledgebase

Browse articles on provisioning IP phones and troubleshooting PBX-related problems. Learn new ways to configure your phone system and maximize its functionality. Access Knowledgebase

User Guide

Read the official user guide and learn how to setup all of its built-in features. Read this guide for tutorials on call flow management (mobile app included) and softphone creation. Access User Guide

Questions?

Frequently asked questions (FAQ) are listed questions and answers, that are commonly asked. These FAQs will help answer many questions you have in mind concerning our services. Access FAQs

Resolve Jitter and Delay

Delay, also known as latency, is the time it takes voice data to arrive at its destination. It's natural but becomes a nuisance in excess. For example, a person may speak and wait several seconds for the other party to hear what he or she said.

Variants in delay make up jitter. Jitter can disrupt a conversation by passing audio inconsistently, making it choppy and lagged. The greater the range in delay, the worse the quality. Often, jitter results in two users talking over one another.

Causes

  • Network congestion (“queuing delay”)
  • Unstable or limited upload/download speeds
  • Lack of data prioritization (“handling delay”)

Solutions

Whenever voice data enters a queue, it creates gaps in the packet sequence. IP devices detect and correct these gaps with a buffer. It imposes a small delay to allow packets to arrive and shuffle into the proper order. A buffer too small does not allow enough time to do so. One too large causes greater delays than necessary.

Besides adjusting the jitter buffer, setting QoS on the networking components can correct delay. Essentially, the QoS allocates data to specific devices before others. In this case, the IP phones get an expressway for packets to travel, jumping the line in any queue along the way.

The distance a packet travels may also produce delay. That said, latency between two points that is consistently high is better than latency that fluctuates per call. Like distance, security can halt a packet's journey out of or into a network. Should other troubleshooting methods fail, security settings should be re-evaluated.