Telos VX shines spotlight on Broadcast VoIP at NAB

Telos VX shines spotlight on Broadcast VoIP at NAB Multi-studio VoIP Talkshow System leverages IP for better caller audio, system flexibility

2 April 2012, Cleveland Ohio, USA

Thanks to the new Telos VX Broadcast VoIP Talkshow System visitors to the Telos display at NAB 2012 will see firsthand what VoIP (Voice over Internet Protocol) brings to broadcasters.

"It‘s clear that IP is taking over and is here to stay," says Telos VP Kirk Harnack. "Phone calls carried by IP simply sound better than their traditional POTS or ISDN counterparts. For as long as I can remember, station engineers have pursued cleaner, clearer on-air phones. By combining VoIP with our most powerful hybrids ever, Telos VX delivers. And VoIP over SIP (Session Initiation Protocol) has a clear path forward to full voice and even music audio bandwidth; there‘s a big future here."

VX is the world‘s first multi-studio broadcast VoIP talkshow system, and it‘s quickly becoming the new standard for multi-line, multi-studio phone installations. VX can manage up to 20 studios, with up to 16 active hybrids and 48 simultaneous calls. More than 100 facilities are already upgraded to VX as broadcasters take advantage of the benefits of a true VoIP-based studio phone system. Although VX is powerful enough to manage multiple simultaneous talkshows in the largest facilities, it‘s also cost- effective enough to use in stations with just 2 or 3 studios.

VX connects to POTS and ISDN phone lines using standard telco gateways, but a connection to a modern SIP Trunking services enables high-fidelity caller audio via native support for the G.722 audio codec - sometimes called "HD voice." G.722 allows stations with SIP Trunking to receive wideband, 7kHz audio from callers utilizing SIP clients such as iPhone‘s Acrobits app, or SipDroid for Android phones, while connected to 3G or 4G cellular networks. G.722 uses about the same amount of bandwidth as G.711, but samples audio at 16kHz - double that of G.711. The result: much better speech quality from callers using cell phones with SIP clients.

Comprehensive Omnia audio processing ensures that calls sound their best whether they originate on analog, digital or IP networks. Telos Digital Dynamic EQ, Smart AGC, and a three-band adaptive spectral processor produce superior caller audio; send audio gets sweetened courtesy of an AGC/limiter, frequency shifter, and other advanced audio tools. And Advanced Echo Cancellation from FhG literally eliminates echo and feedback in open-mic/open-speaker studios.

Flexibility is another advantage of the VX system‘s IP-based architecture. Adding or relocating VSet phone controllers is as simple as plugging in an Ethernet cable. Incoming lines can be easily re-allocated on demand to a studio that needs more call capacity. Line allocation configurations can be pre-defined and saved to VX Shows, which can be loaded in any studio with the touch of a button. And VX connects easily to LivewireTM networks via Ethernet, and to standard studio systems via analog or AES audio interfaces.

Conveniently, VX connects with nearly any SIP-friendly PBX, facilitating a long-sought dream: the ability to transfer calls from studio to business office, and vice-versa.

Flexibility with call control is another benefit of the Telos VX system. Station with VX can choose from a variety of ways to take control of their phones. Each VX supports up to 100 connected control devices.

    • The VSet12 phone, with twin LCD color displays, gives talent command of up to 12 lines at once. Exclusive Telos Status SymbolsTM keep talent informed of line and caller status; when used with VX Producer or third-party call screening software from Telos partners, the VSet12 display also delivers detailed information such as Caller ID, time ringing-in or on-hold, and even screener comments.
    • New six-line and single-line VSet6 and VSet1 phones, with color LCD displays and Status Symbols, are perfect for smaller studios or production rooms where command of fewer phone lines is required.
    • For stations with Axia IP-Audio networks, Call Controller modules for Axia Element 2.0 and iQ consoles allow direct control of VX hybrids right from the mixing board, so talent never has to take their eyes off the console to work the phones.
    • VX Producer software, supplied with each VX system, is a full-featured call screening package with producer/talent communication functions, a built-in SoftPhone that turns any PC with a sound card and headset/mic into a call screening station, and recording features that allow quick capture of off-air phone calls for later use.

Visitors to NAB 2012 in Las Vegas can see the entire VX system in operation at the Telos Alliance exhibit, Booth C3113 in the Central Hall. Attendees can also attend a white paper presentation by Telos‘ Joe Talbot, entitled "VoIP In The Real World: How I Quit Worrying And Learned To Live Without POTS," to learn about real-world examples of VoIP usage in broadcast studios; the presentation will be delivered Monday, April 16, at 10:30 AM in Room S227 of the Las Vegas Convention Center.

  • For more in-depth information about Telos VX and for media information, call +1 216-241-7225.


Telos Systems, headquartered in Cleveland, Ohio with offices in Europe, is a leading manufacturer of ISDN, coded audio and telephone interface products for talk-shows, teleconferencing, audio production, remote broadcasts, and intercom applications.