NOTES, RESOURCES, ADDITIONAL INFORMATION | 95
How are callers on the VoIP trunks going to sound? What about echo? Won’t cell phones sound
even worse than usual?
The VX has enough processing horsepower to deal with even extreme echo situations, and
four- wire Telco delivery means that the only external echo path is from the caller’s line, when
it’s analog, and the caller’s handset. The VX uses Telos’ latest hybrid technology (5th genera-
tion), enhanced with the latest state of the art acoustic echo cancellation. Even when using
open speakers, and changing levels during a call, the new algorithm makes feedback nearly
impossible.
Steve Church once told me that IP cell phones can sound *better* than usual 3 kHz circuit
switched phone technology - something about G.722 dot something. Is this true?
Right. Current Cisco VoIP phones, for example, support the g.722 codec. The VX supports this,
as well. However, Steve was probably referring to “AMR Wide Band” also known as G.722.2.,
sometimes called “HD Audio”. It’s 7khz and doesn’t sound at all like “phone audio” - in fact,
it sounds better than regular G.722! AMR-WB is part of the new ITU standard for mobiles, so
should grow over time. Meanwhile, some IP-based apps for mobiles are starting to use wide-
band codecs, such as MPEG-ELD in Apple’s ‘facetime app.
Note that VX’s call audio processing is bypassed when using g.722.
OK, I am starting to see the light. Cool stuff, but where’s the catch? Is VX hard to install and
configure?
Setup is via web. It may be little different than what you’re used to (or not) but it’s not difficult,
and some customers never crack open the book to set it up. Power and flexibility do come with
a little complexity, but we’ll always be at your side should you need us.
There is no such thing as a free lunch - it must be hard to use then, I know there’s a catch... I
really don’t have time to explain a new system to the air staff.
We know! Rest assured it’s easier for your talent, not harder! We recognize that any time you
change anything in a studio, there can be some transition time. While there are a lot of new
features in the VX, your staff can use the basic stuff immediately because it works just like
familiar and comfortable Telos gear. The color, hi-rez LCDs and seamless console integration
(to Axia Element and iQ) enhance the user experience. As you read this, systems around the
world are screening calls and putting them on the air without drama. Jocks and Talk hosts alike
praise the VX!
If I use an Axia console, it gets even better?
Yes – that’s the ultimate! You start with the most flexible console/audio-platform and then add
smoothly integrated phones with the IP network powering it all. Sweet! The network delivers
any of your Telco lines to any of your studios, in any combination. Any line is available in any
studio at any time.
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