5 Lines Test

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IMPORTANT NETWORK ASPECTS

VoIP systems that use IP Phones or Analog Phone coupled to an ATA (Analog Telephone Adaptor) require excellent internet connectivity for optimal performance. Cable companies usually provide adequate connectivity. It is recommended for office use to use their high capacity business plan, vs. the cable internet home plan which is good for a home VoIP system.

The network capacity and performance will define the number of concurrent calls that your system will support (15 concurrent calls require about 1Mbps), which is about normal for cable internet home service.

Measurements of the network performance can be done from this page, free of charge, to determine the capacity and expected QOS (Quality of service) of your internet connection.

Network connectivity to a VoIP system is like the Power grid for your air condition system. If your network is down your office phones or home phone are down. With proper setup of the Phone.com system, in case of a Network downtime or power failure, all incoming calls can be automatically routed to your cell phones or voicemail.

About 90% of the day to day features used including call transfer will continue to work from your cell phones. Even outbound calls can be accomplished.

Proper connection of your network components and ATA units to a simple UPS system can provide power to the network components even when the power grid is down and keep your home or office phones alive.

How can VOIP Quality Test help me?

The test performed is a UDP connection test intended to help establish whether a network connection is sufficient to carry a quality Voice-over-IP call. The test measures the metrics of Jitter and packet loss which impact the performance and quality of VoIP and other UDP based applications.

Measures UDP jitter

Jitter occurs when data packets do not arrive at the destination in the appropriate timing they were sent. This test simulates voice traffic over a UDP connection and measures the amount of jitter occurring, and show you the associated level of voice call quality.

Measures the quality MOS score

MOS tests for voice are specified by ITU-T recommendation P.800.

The MOS is generated by averaging the results of a set of standard subjective tests where a number of listeners rate the heard audio quality of test sentences read aloud by both male and female speakers over the communications medium being tested. A listener is required to give each sentence a rating. This test predicts the MOS score by evaluating objective network parameters. The score is normally between 1 and 5 with 5 being the best.