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Audio quality is an important part of any VoIP phone. Mainly because sound travels over internet to reach the specified caller. Lots of factors will affect the quality of sound in the best audio IP phones. They are:

Latency/Lag: It is the time between the moment a voice packet is transmitted and the moment it reaches its destination. This inturn leads to delays and echos. Measured in milliseconds (ms), a value of 150 ms is acceptable but higher values affects the audio quality.

Bandwidth: The type of internet connection you have affects the sound quality in IP phones. While lower bandwidth results in less quality in sound, a broadband connection is ideally suited if its not shared between too many devices. Typically an 1MBps is more than adequate for basic VoIP calling.

Hardware equipment: Always settle for good brands when buying IP phones. Cheap or second hand phones result in poor audio quality.

Weather conditions such as thunderstorms can cause static in the broadband connection resulting in poor audio quality.

Top brands such as Panasonic, Grandstream, Polycom have kept all these factors in mind and manufactured the best audio IP phones. They have all the regular features such as call hold, call forward etc. In addition to extra features such as voice recording, One-touch speed dial, redial, Remote missed call notification, Do not disturb function, Speaker, Voice Mail, conference call, internet features such as skype, yahoo, etc.

Take a look at the best audio IP phones from the products shown here which provides excellent sound while maintaining call quality.

Browse All Top Audio IP Phones »

Panasonic KX-UT670

Panasonic KX-UT670 IP Phone


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Panasonic KX-UT670
Fortinet FortiFone 350i
Polycom VVX 500
Invoxia NVX 610
Panasonic KX-TGP500
Panasonic KX-UT670 IP Phone
Fortinet FortiFone-350i IP Phone
Polycom VVX 500 12-line Business Media Phone
Invoxia NVX 610 Voice over IP Desktop Phone
Panasonic KX-TGP500 IP Phone
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Release Date
Apr 2012
Aug 2012
Jan 2012
Aug 2011
Jun 2011
Type
IP Phone
IP Phone
IP Phone
IP Phone
Cordless phone

  • The KX-UT670 is the executive Android ( 2.2 ) IP phone in Panasonic's line of KX-UTXXX models for the hosted/open source market. This phone has no hard keys. Like some of the other Android based VoIP desk phones we've seen - the Grandstream GXV3175 and the CloudTC Glass 1000 come to mind - the KX-UT670 relies solely on its touch screen for user input.


  • The Panasonic KX-UT670 demonstrates how using an open platform like Android enables useful third party apps like TouchDown and LightTouch Reception. Besides the ability to customize and develop apps for the KX-UT670, the ability to control up to 16 PTZ cameras certainly gives this phone some niche applications such as a security desk or even an executive's home-based IP phone used when working from home.


  • The VVX 500 has a standard set of hard keys: a numpad with round buttons that are large and satisfying to use, buttons to control volume, activate headset, speaker, and mute, and finally, a button that takes users to the main 'Home' screen on the touchscreen display.


  • It's a bit premature to make closing statements about the Invoxia NVX 610. We love the idea, the audio quality is great, and the build quality of the device is clearly fantastic. However, if you're going to advertise a product as the 'Next Generation' anything, I would expect that you would include the features of the 'Previous Generation': Multi-call handling, Blind Transfer, Attended Transfer, Multiple SIP accounts, etc. We will update this write-up when we get our hands on the next firmware version.


  • The Invoxia NVX 610 is an easy-to-use all-in-one meeting room speakerphone system with some genuinely innovative features, but given that some only work with calls to other NVX 610s, it's otherwise rather pricey for an iOS accessory.


  • The Panasonic TGP500 comes with a base station, an unassuming black box that you can mount on a wall or hide in the corner of a room somewhere, and one Panasonic TPA50 cordless handset. Each base station supports up to 6 handsets, and up to 8 different lines. Each base station can also handle up to 3 simultaneous calls to the outside world, but you'll be able to intercom between handsets without taking up any of your 3 open lines.


Top 5 audio ip phone:

  1. Panasonic KX-UT670 IP Phone
  2. Fortinet FortiFone-350i IP Phone
  3. Polycom VVX 500 12-line Business Media Phone
  4. Invoxia NVX 610 Voice over IP Desktop Phone
  5. Panasonic KX-TGP500 IP Phone