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VoIP Phone

The Definitive Guide to a VoIP Phone System.

What Is VoIP?

VOIP is an acronym for Voice Over Internet Protocol, or in more common terms phone service over the Internet.
If you have a reasonable quality Internet connection you can get phone service delivered through your Internet connection instead of from your local phone company.
Some common features might include:

  • audio calls & video calls.
  • voicemail & instant messaging.
  • team chats & email.
  • mobile and desktop apps.and
  • mobile and local number portability (allows a subscriber to choose a new telephone carrier without needing a new number).
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How Does VoIP Works

VoIP is telephone service over the internet. VoIP has been around for a while now and is adopted worldwide by pretty much every organisation (startups, SMEs and even enterprises), and is the first choice for any organisation looking for a new phone system.

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We provide a free plan to get every small business up and running with virtually no cost. or trial or large packages for 30 days free*.

Use your assigned number

When you sign up, we give you a free UK landline telephone number (that’s yours forever*) – provided that you use it.

What Are VoIP Codecs?

Codecs (Coder/Decoder) serve to encode voice/video data for transmission across IP networks. The compression capability of a codec facilitates saving network bandwidth and it is therefore appropriate that you choose the correct codec for your IP network. Here is a quick reference to the codecs with the corresponding packets size and bandwidth usage.

  • In Table 1, there are codecs belonging to Group I (waveform codecs) with notes on basic characteristics
  • Table 1: Common waveform codecs used in VoIP
Name
(Standard)
DescriptionBit rate
[kbps]
Sampling
[kHz]
Frame size
[ms]
Notes
G.711 (ITU-T)PCM648Sample-basedA-law & μ-law
G.711.1 (ITU-T)PCM80-968/16Sample-based
G.721 (ITU-T)ADPCM32 8Sample-basedNow G.726
G.722 (ITU-T)2-band ADPCM6416Sample-based
G.722.1 (ITU-T)MLT24/321620
G.722.2 (ITU-T)AMR-WB6.6 – 23.851620Main app: 3rd gen mobile
G.723 (ITU-T)ADPCM-extension24/408Sample-basedNow G.726
G.726  (ITU-T)ADPCM16/24/32/408Sample-basedReplaces G.721 and G.723
G.727  (ITU-T)ADPCMVariable8Sample-basedSimilar to G.726
DVI (IMA)DVI4 uses ADPCM32VariableSample-based
L16Linear PCM128VariableSample-basedWB (uncompressed)
  • In Table 2, there are codecs belonging to Group II (model-based codecs, i.e., related directly or indirectly to Linear Prediction models) with notes on basic characteristics.
  • Table 2: Common model-based (LP-related) codecs used in VoIP
Name
(Standard)
DescriptionBit rate
[kbps]
Sampling
[kHz]
Frame size
[ms]
Notes
G.723.1 (ITU-T)MP-MLQ and ACELP5.6/6.3830A part of H.323 video conf
G.728 (ITU-T)LD-CELP1682.5Very low delay
G.729 (ITU-T)CS-ACELP8810Low delay (15 ms)
G.729.1 (ITU-T)CS-ACELP8-32, step 2810WB
GSM 06.10 (ETSI)RPE-LTP13822.5Mostly in GSM cellular; seldom in VoIP
LPC10 (USA Gov)LP2.4822.5Very seldom used in VoIP
SpeexCELP8,16,32NB & WB30 (NB), 34 (WB)Also includes ECAN and NR features
DoD CELP (DoD)CELP4.830
EVRC (3GPP2)RCELP9.6/4.8/1.2820Enhanced Variable Rate CODEC; for CDMA
DVI (IMA)IMA32VariableSample-based
SILK (Skype)LPC6-40Variable20Adaptive bit-rate codec; low delay
iLBCAAC813.330NB (there is a 15,2 kbps version)
  • Tables 1 and 2 include examples of codecs that are relatively frequently used in VoIP technology. The full list of waveform-codecs and model-based (for example, CELP) codecs is much longer. There are also many proprietary solutions for encoding and decoding speech signals following waveform coding as well as the model-based coding.

What Is VoIP Business?

VoIP is telephone service over the internet. VoIP has been around for a while now and is adopted worldwide by pretty much every organisation (startups, SMEs and even enterprises), and is the first choice for any organisation looking for a new phone system.

Read More

How To Connect With VoIP To Network? ( Ways To Connect )

You have three ways to connect to our VoIP Business hosted / Cloud telephone system.

  • Use our web phone (works on all popular browsers).

  • Our soft phone is available on any device with any web browser.

  • We have a good selection of business-grade desk and office phones.

  • Our mobile app is in progress that would integrate also other CRMs.

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