Switch to high definition voice telephony

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The high definition voice telephony is gaining more and more followers within the communications industry. You should know that high definition (HD) voice is compatible with existing systems, so the transition is fairly straightforward.
Despite this advantage, we will explain the ways to make the change in an even simpler way. Below are some tips that technology managers should take into account when deploying a high-definition voice telephony in their companies.

Pay attention, because I have good news for you. If you are thinking of deploying a High Definition Voice system in your company, I will tell you that it is much easier to switch to HD from a narrow band audio system. It is totally different from what it was to change from the old telephone service to the voice over IP .

Why? Because HD voice (also known as broadband audio telephony) uses the existing standard VoIP signal, protocols and networks. In this way, if you have already switched to a voice over IP service, the transition to HD voice will be a path of roses .

The high definition voice makes conversations over the phone much more productive and much more enjoyable than we are used to, as it restores two thirds of the audio spectrum that conventional phones discard. The HD voice makes it sound as if the person you’re talking to on the phone is on the other side of the room. If you have never experienced what high-definition voice is, think of high-definition television or high-definition radio. As soon as you see or hear it, you realize the difference. This is one of the reasons why the high definition voice is gaining more and more followers.

The good news is that this high-definition system is compatible with existing systems, so the transition is fairly straightforward. Actually, it is relatively simple because it continues to use the standard SIP (Session Initiation Protocol) protocol . Even better, data transfer rates are generally comparable to the G.711 standard. Many people mistakenly assume that broadband demands are higher, but it is not, so take note!

Still, no matter how simple the transition is, there are always ways to make it even easier. I recommend that you keep track of the following tips, starting with some considerations regarding hardware.
The high definition voice is gaining more and more followers within the communications industry. You should know that high definition (HD) voice is compatible with existing systems, so the transition is fairly straightforward.

Five hardware considerations
1. Make sure the PBX recognizes High Definition. If you didn’t do it already, a simple update to VOIP PBX is enough. What happens is that the “G.722” (by far the most popular VoIP broadband codec today) is added to the list of allowed codecs. Most large PBX vendors are already selling compatible G.722.
2. Make sure all the new VOIP phones you buy are compatible with HD Voice. The networks are moving quickly to high definition and the phones usually have a 10-year service life – which means that a narrowband phone you buy today will become obsolete long before it goes out of service. A narrow band phone will do a weak service in a high-definition conference. Take advantage of the multiple broadband phones and high definition voice systems available today in the market.
3. Get voice quality – not just “G.722 compatibility” -. For the same reasons that when an HD video signal is placed on an old television the image obtained remains the same as that of traditional videos, the HD voice needs something more than the G.722 codec. High definition voice means high definition microphones, a large speaker subsystem, careful acoustic design and strong integration between software, hardware and mechanics. And if the phone has built-in speakers, it is even more important. Support for high definition voice does not mean that the phone has full high definition quality, so compare and listen for yourself.
4. Change speakers. The advantages of high definition voice are more appreciated in group conferences where distractions and acoustics are bad (noise, people who don’t speak loudly or have different accents). These “outside” circumstances are what really make high definition appreciated, even more so than the type of device. If the speakers have also been changed, users will be impressed.
Four considerations about the network

1. The High Definition voice uses an extra codec in the VoIP phone, but is fully inter operable with standard narrow band SIP phones. This happens because the HD voice adds another mode but without removing the one that is already present; The phone can continue to support any narrow band codec and previous connections. If an HD phone calls a narrow band phone, they will connect to the narrow band and work fine. If you call an HD phone, they can connect in broadband – and they will sound much better than normal ones.
2. Check that call routing supports high definition voice. The current PSTN (Public Switched Telephone Network) does not yet support high definition, so even if the access and arrival points are compatible with HD, the router over a PSTN network will force the entire call to be narrow band . Yes, they will connect, but they will connect to a conventional narrow network because it will be restricted by the PSTN network. To avoid this, the route through private networks and IP networks does maintain HD quality. Therefore, it is important to take into account the hired calling plan and IP trunking to maximize the range that connections can reach from point to point with high definition voice.
3. Check that the LAN and WAN are capable of handling G.711 data rates. The G.722 codec uses the same bit rate for high definition voice as the G.711 uses for narrow band audio (64 Kbps or about 80 Kbps with overhead network). But if a user has implemented a high compression codec such as G.726 or G.729 for a narrow-band voice over IP system, high-definition calls could increase network bandwidth. Especially in these types of systems, the bandwidth and capacity of the WAN device – including buffer size and queue – should be examined.
4. HD Voice function. The most important function that people need, of course, is the port – the more people there are on the call, the more important it will be to have HD voice connections, because the sound easily deteriorates at conferences. A sure way to succeed is to start with a conference service provider that supports High Definition Voice.

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