94 | Section 5
How can I get reliable VoIP trunk lines? What is involved? Can you recommend a vendor?
Yes, we can assist. We have been working closely with the VX beta sites and other early adopt-
ers of VoIP, so we have plenty of experience to share. There are several types of VoIP dialtone
providers. You’ll want to consider how the service will be delivered to you; via the Internet
(like Vonage), or via a dedicated IP circuit from the provider that includes a Service Level
Agreement and guaranteed Quality of Service (as offered by a number of vendors including
most of the traditional Telcos). For discussion of this and other matters, check the Telos web
site on a regular basis as we continue post material on this and related topics.
I know that SIP is supported by the new IP codecs. Will the VX be able to connect to my
Zephyr/IP in the field? Other codecs?
As we hinted above, Yes! The VX supports g.722 (7khz, ‘wideband audio’ and g.711 (3.4khz,
“phone quality”).
What about SIP, SDP, RTP, ENUM and UDP?
We know that engineers are lifetime learners and encourage that. However, just as you prob-
ably don’t know much about “SS7” or “IUP” in the telephone network, understanding these
details is optional. We do have White Papers on our web site to educate you on these, and
other, terms. Start with the one here: You could read Steve and Skip’s AoIP book, too, for a fun
and comprehensive coverage of this stuff.
Here’s a paper on the adaptive IP codec: http://telos-systems.com/techtalk/Advanced%20
Tech%20for%20IP%20Remotes_Church_Final.pdf
Does Livewire technology come in to the VX picture?
Yup. The VX takes VoIP on the Telco side and Livewire AoIP on the studio side. This makes
integration with Axia consoles and networks easy and efficient. If you don’t already have a
Livewire network, you would use Axia analog or AES audio ‘nodes’ to provide I/O in either for-
mat. Each node provides eight stereo inputs and eight stereo outputs to and from the system.
Each Axia GPIO node provides 8 “groups” of 5 inputs and 5 outputs, covering the needs of 8
studios. Telos Support is always available to help you specify exactly what you need. If you are
new to Livewire Technology you may wish to skim through our Primer, here: http://www.
axiaaudio.com/manuals/files/IntroToLivewire2.1.pdf
So the two can live together side-by-side on the same LAN?
Yes they can.
So let’s talk caller audio quality. What does VX offer compared to the NX series and your
legacy products?
Advanced audio processing and the fact that you never have to overcome Telco loop losses or
extra two to four wire conversions means that the voice quality is as good as it can be. Calls
from mobile phone calls will be less than perfect at times, but VX extracts the best possible
from them.
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