VX Broadcast VoIP

Return to Previous Page

Product Description

VX is the world’s first VoIP (Voice over IP) talkshow system — a broadcast phone system that’s so powerful it can run all of the on-air phones for your entire plant, but economical enough for stations with just two or three studios. VX connects to traditional POTS and ISDN telephone lines via standard Telco gateways. But it also connects to VoIP-based PBX systems and SIP Trunking services to take advantage of low-cost Internet-delivered phone services.

VX also weds modern networking to the remarkable power of digital signal processing. VX uses Ethernet as its connection backbone, significantly cutting the cost of phone system installation, maintenance and cabling. Ethernet is a powerful, yet simple way to share phone lines among studios and connect system components. This also makes VX naturally scalable, capable of serving even the largest of facilities — while remaining surprisingly cost-effective for even single stations with more modest needs.

VX plugs right into Axia IP-Audio networks, connecting multiple channels of audio and control via a single CAT-5 cable. Don’t have an IP-Audio network yet? No problem; optional VX interfaces break out audio into analog and digital formats, along with GPIO logic commands. And with informative VSet phones, talent finds it easier than ever to take control of their callers, moving and sharing lines between studios at the touch of a button.

Please follow and like us:
More Info

Additional Information


Telos 5th-generation Adaptive Digital Hybrids.

Maximum number of phone lines: 48, when used with a-Law or u-Law codecs for VoIP lines. (Higher quality codecs, such as G.722, consume more system resources and result in a decreased number of total lines available.)

Maximum number of SIP numbers: 250

Maximum active on-air calls: 48

Maximum number of simultaneous audio connections (Livewire+ I/O channels): 16 systemwide

Maximum on-air calls on one fader: 4

Analog Inputs (with VX Interface):

Input Impedance: >40 k Ohms, balanced

Nominal Level Range: Selectable, +4 dBu or -10dBv

Input Headroom: 20 dB above nominal input

Analog Outputs (with VX Interface):

Output Source Impedance: <50 Ohms balanced

Output Load Impedance: 600 Ohms, minimum

Nominal Output Level: +4 dBu

Maximum Output Level: +24 dBu

Digital Audio Inputs And Outputs

Reference Level: +4 dBu (-20 dB FSD)

Impedance: 110 Ohm, balanced (XLR)

Signal Format: AES-3 (AES/EBU)

AES-3 Input Compliance: 24-bit with selectable sample rate conversion, 32 kHz to 96kHz input sample rate capable.

AES-3 Output Compliance: 24-bit Digital Reference: Internal (network timebase) or external reference 48 kHz, +/- 2 ppm

Internal Sampling Rate: 48 kHz

Output Sample Rate: 44.1 kHz or 48 kHz

A/D Conversions: 24-bit, Delta-Sigma, 256x oversampling

D/A Conversions: 24-bit, Delta-Sigma, 256x oversampling

Latency <3 ms, mic in to monitor out, including network and processor loop

Frequency Response

Any input to any output: +0.5 / -0.5 dB, 20 Hz to 20 kHz

Dynamic Range

Analog Input to Analog Output: 102 dB referenced to 0 dBFS, 105 dB “A” weighted to 0 dBFS

Analog Input to Digital Output: 105 dB referenced to 0 dBFS

Digital Input to Analog Output: 103 dB referenced to 0 dBFS, 106 dB “A” weighted

Digital Input to Digital Output: 138 dB

Total Harmonic Distortion + Noise

Analog Input to Analog Output: <0.008%, 1 kHz, +18 dBu input, +18 dBu output

Digital Input to Digital Output: <0.0003%, 1 kHz, -20 dBFS

Digital Input to Analog Output: <0.005%, 1 kHz, -6 dBFS input, +18 dBu output

Crosstalk Isolation, Stereo Separation and CMRR

Analog Line channel to channel isolation: 90 dB isolation minimum, 20 Hz to 20 kHz

Analog Line Stereo separation: 85 dB isolation minimum, 20Hz to 20 kHz

Analog Line Input CMRR: >60 dB, 20 Hz to 20 kHz

VX engine
IP/Ethernet Connections

One 100BaseT/gigabit Ethernet via RJ-45 LAN connection

One 100BaseT/gigabit Ethernet via RJ-45 WAN connection

Processing Functions

All processing is performed at 32-bit floating-point resolution.

Send AGC/limiter

Send filter

Gated Receive AGC

Receive filter

Receive dynamic EQ


Sample rate converter

Line Echo Canceller (hybrid)

Acoustic Echo Canceller (wideband)

Power Supply AC Input

Modular, field-replacable auto-sensing supply, 90VAC to 240VAC, 50 Hz to 60 Hz, IEC receptacle, internal fuse

Power consumption: 100 Watts

Operating Temperatures

-10 degree C to +40 degree C, <90% humidity, no condensation

Studio Audio Connections

Via Livewire+ IP/Ethernet. Each selectable group and fixed line has a send and receive input/output.

Each studio has a Program-on-Hold input.

Each Acoustic Echo Canceller has two inputs (signal and reference) and one output.

Livewire+ equipped studios may take the audio directly from the network. VX Interface nodes are available for pro analog and AES3 breakout.

Telco Connections

Audio: standard RTP. Codecs: g.711u-Law and A-Law, and g.722

Control: standard SIP trunking

Back to top