Nx12 Twelve-Line Talkshow System


Telos Nx12 and Nx6 Talkshow Systems are advanced multi-line telephone systems which each feature four independent digital hybrids. Callers can be managed in separate “screened” and “hold” queues, and taken to air on a dedicated hybrid or “button mashed” for quick on-air conferencing. Each hybrid has symmetrical wide-range AGC by Omnia, plus long-tail-echo cancellation to deal with VoIP and cellular calls.

Nx systems can also be configured for dual-studio operation, in which two separate studios may share or split incoming phone lines: each studio receives its own independent caller queue and command of two of the Nx system’s hybrids, maximizing both your technology investment and the flexibility of your Nx system.

Nx systems may be ordered with AES/EBU or Analog I/O, and include Livewire IP-Audio connectivity, standard. Phone line support includes ISDN S or U interface and/or universal POTS. Each NX system includes XScreen Lite call screening software from Broadcast Bionics for easy caller management.



  • 12- and 6-line talkshow systems, each with four (4) DSP-powered telephone hybrids. Analog or AES/EBU I/O connection allows use of two hybrids; connection to Livewire IP-Audio Network or Telos VX Interface enables use of additional two hybrids for a total of four.

  • Works with POTS (analog) telephone lines, or ISDN connections (two BRI channels per connector). Supports ISDN U (2B1Q 2-wire, USA & Canada) and ISDN S (4-wire, outside North America) digital connections.

  • Standard audio connections includes analog and Livewire AoIP I/O. AES/EBU connections are optional at extra cost. 

  • Native Livewire connection integrates caller audio, program-on-hold, mix-minus and logic directly into Axia AoIP consoles and networks via single CAT-5 connection.

  • Dual-Studio mode allows one Nx system to serve two studios, each with assigned or shared phone lines. Two separate Program-On-Hold inputs support different audio feeds in dual-studio mode.

  • Default configuration supports connection of up to 4 control surfaces (Desktop Director phones, screener PCs or drop-in modules for Axia consoles). Optional accessory power supplies allow connection of up to 8 control surfaces.

  • Telos 3rd-generation adaptive digital hybrids include send-to-caller Acoustic Echo Cancellation, high-pass filter, frequency shifter, AGC/limiter, Program-on-Hold AGC/limiter and sample-rate conversion for AES connections. 

  • Receive-from-caller processing includes a high-pass "hum" filter, smart AGC/platform leveler, noise gate, Telos DDEQ (Digital Dynamic Equalization) 3-band adaptive spectral control processor, and sample rate conversion for AES connections. 

  • Trans-Hybrid Loss of > 55 dB. 

  • Built-in Web server for configuration and software updates, plus Telnet capability for command line control and diagnostics. 

  • GPIO for recording, delay, tally functions provided on standard 15-pin D-Sub connector with 5 status outputs and 4 control inputs. LIvewire GPIO available when connected to Livewire IP-Audio systems. 

  • Desktop Director controllers with dot-matrix LED Status Symbols display report line and caller status at a glance. 

  • Drop-in modules can integrate Nx phone control directly into your Axia mixing consoles. 

  • Includes XScreen Lite call screening software from Broadcast Bionics. 



Take total control of your talk shows and call-in segments. 

Find a radio facility where caller audio quality is important, and chances are you'll find a Telos Nx broadcast phone system. Nx12 twelve-line and Nx6 six-line systems deliver the cleanest, most consistent call quality possible from even the most challenging calls. Nx systems combine multiple advanced telephone hybrids (each with their own AGC, noise gate, and caller override dynamics) with Telos' famous Digital Dynamic EQ, a sophisticated multiband equalizer and analyzes and adjusts received audio spectral characteristics so that calls sound smooth and consistent despite today's wide variety of phone sets and connection sypes. Nx systems also feature caller audio sweetening by Omnia, special echo cancellation to tame tricky VoIP and cellular calls, and anti-feedback routines to tackle the acoustic feedback that plagues open speaker applications. 

Both talent and producers love working with Nx, thanks to unique Telos features that help make shows run smoother, faster and more error-free. Exclusive Telos Status Symbols visual call management icons clearly show line and caller status; special-function keys on Desktop Director phones let you command GPIO-style outputs for push-button command of profanity delay systems and recorders.

Nx6 and Nx12 systems can be ordered to work with your choice of POTS or ISDN (BRI) phone lines, and work with the Telos Desktop Director phoneset and drop-in modules for Axia Audio mixing consoles. The Ethernet port makes short work of connecting to PCs with call screening software (and provides a one-click connection to Axia IP-Audio networks, as well). Setup is easy too: each Nx system has a built-in Web server for fast configuration and remote monitoring functions.

Nx6 works with up to 6 telephone lines, and Nx12 with up to 12 lines. Each have four hybrids, for extra flexibility in fast-paced talk environments; two hybrids may be used with analog or AES I/O while connecting Livewire I/O allows use of all four advanced hybrids. Nx systems feature a useful "dual studio mode" that allows a single system to power phones for two studios at once, each with its own Program-On-Hold input. Out of the box, you can connect 4 control surfaces (phones, screener PCs or console directors) for flexibility in commanding your calls -- or up to 8 surfaces using accessory power supplies. 

Nx6 and Nx12 work with any mixing console. Both come standard with analog I/O, and Nx12 can be outfitted with an optional AES interface that allows direct access to all four hybrids individually. But should you happen to have Axia IP consoles, Nx talkshow systems connect directly using just a CAT-5 cable. That one connection takes care of all audio I/O, on-hold inputs, hybrid control and GPIO. Drop-in modules available for Axia Element consoles let users easily take control of their Nx6 or Nx12 system right from the console. Choose the Call Controller module with onboard hybrid controls with Status Symbol displays, or the standard four-fader module for “fader-per-hybrid” European operating style.

Most importantly, Nx systems make your call-in segments sound great thanks to a host of sophisticated DSP and audio processing routines. There's our famous Digital Dynamic EQ and a symmetrical wide-range AGC and noise gate from the audio processing experts at Omnia Audio for caller consistency. Adjustable caller ducking to help your hosts keep control of the conversation. And a sophisticated pitch shifter and studio adaptation routines that help keep feedback from appearing when taking calls with open speakers. Additionally, Nx6 and Nx12 feature Caller ID on both analog POTS and ISDN telephone lines, and feed that data over Ethernet to your call screening application. 

Nx systems with work happily with either POTS, ISDN-S, or ISDN-U lines -- just tell us when you order. Or, split the difference: with Nx12 you can specify half POTS, half digital line interfaces. 


Desktop Director Phone Controllers

Telos Desktop Directors are sophisticated, yet easy-to-use phonesets that make fast-paced production a snap. Desktop Directors help you screen calls quickly and efficiently using deluxe feature like the built-in handset and speakerphone -- there's even a port to connect your screener's favorite headset. And caller management has never been simpler, thanks to intuitive Telos Status Symbols -- clear, easy to read graphical icons that convey immediate information about line availibility, on-hold an ready-for-air queue status with just a glance. 


On-Console Control 

Nx systems work with any brand of broadcast console. But wouldn’t it be great if talent could take control of phones without ever having to divert their attention from the board? Whether your shows consist of live calls or pre-recorded interviews, phone segments are usually fast-paced with little room for error. But traditionally, the phone system was separate from the on-air console, making it hard to use both together efficiently, leading engineers and talent to ask: “Why can’t the console and the phone system work together?”

Now, they can. Nx12 and Nx6 can connect directly to Axia mixing consoles using Livewire IP-Audio to eliminate the cost and complexity of old-style inputs, outputs, and mix-minuses. IP-Audio networking technology provides the ideal way to integrate broadcast phones into the on-air console — the control center of every studio. Users enjoy seamless console integration, with phone controls right on the board so that talent can dial, answer, screen, and drop calls without ever diverting their attention from the console. Information about line and caller status can be displayed right on the console as well. 

There are plently of other advantages to melding phones with consoles. Like the ease of installation; IP-Audio consoles with built-in phone controllers don't need any additional wires or connections. Their control signaling, caller audio and backfeeds ride on the network connection that's already there. Bringing caller audio in to the IP-Audio domain makes it routable like any other audio source. And since the console now communicated directly with the phone hybrid, mudane tasks such as mix-minus generation, starting recording devices, and playback of recorded off-air conversations can all be automated. All of which means faster, more precise phone segments -- since operators' eyes never need to leave the console. 


Call Screening Software Included

Nx6 and Nx12 systems come complete with XScreen Lite call screening software, from Broadcast Bionics. XScreen Lite’s interface gives screeners and hosts tons of information and control using sophisticated visual talkback, including a drag and drop database of all calls for your show as well as a phonebook and visual warnings for persistent or nuisance callers. A fully-functional copy of XScreen Lite is provided to all Nx clients, but an upgrade to the full XScreen client software adds even more features, including extended call history, an enhanced phonebook, prize management, powerful GPIO functionality and more. XScreen, deployed as part of a Livewire network, also enables call recording, editing and console integration directly over the network.




  • Telos 3rd-generation Adaptive Digital Hybrids.

  • Telos Exclusive Feedback Reduction Functions. 

  • Send-to-Caller Processing: High-pass Filter, Frequency Shifter, AGC/Limiter, Program-on-Hold AGC/Limiter, Sample Rate Conversion (with AES option).

  • Receive-From-Caller Processing: High-pass “Hum” Filter, Smart AGC / Platform Leveler, Noise Gate, Telos DDEQ (Digital Dynamic Equalization) 3-band Adaptive Spectral Processor, Sample Rate Conversion (with AES option)


Analog Inputs: 

  • Send Analog Inputs: 2x 

  • Program-on-Hold Analog Inputs: 2x

  • Connector : XLR Female, Pin 2 High (Active Balanced with RF Protection)

  • Input Level: Adjustable from -10dBV to +8 dBu (nominal)

  • Analog Clip Point : +24 dBu

  • Impedance: Bridging, > 10K Ohms

  • Analog-to-Digital Converter Resolution: 20 bits


Analog Outputs:

  • Receive Analog Outputs: 2x

  • Connector: XLR Male, Pin 3 High

  • Output Level: Adjustable from -10dBV to +8 dBu (nominal)

  • Impedance: <60 ohms

  • Digital-to-Analog Converter Resolution: 24 bits

  • Headroom Before Clipping: 20 dB headroom above 4dBU nominal levels


AES3 Digital Inputs/Outputs (optional)
The AES input/output option module substitutes 2x input and 2x output AES XLRs in place of the standard analog, providing 4x in/4x out channels.

  • Conforms to AES3 standard

  • Sample rates: 32kHz to 96kHz.

  • Rate conversion: Input and output, independently selectable

  • Output Clock: AES input or 48kHz internal.

  • Input Level: Adjustable -27 to –9 dBFS nominal 

  • Output Level: Adjustable –27 to –9 dBFS nominal.



  • Livewire connection is standard for all hybrids in/out and POH audio in.


Audio Performance

  • Frequency Response: +/-0.5dB, 20Hz to 20kHz (swept sine procedure, measured from analog input to output with unit in loopback mode)

  • THD+N: Analog to analog, studio loop mode, 1Khz 18dBu test level: <0.006%

  • Dynamic Range: Analog in to Analog out, studio loop mode, 10Hz-20Khz. 

  • A-weighted: > 92 dB 

  • SNR: Analog output, referred to -12dBm phone line signal (+4dBu studioout), 10Hz-20Khz a-weighted: > 72 dB 

  • Trans-Hybrid Loss: Analog or ISDN phone line, ducking, gate, AGC, EQ all off, relative to +4dBu input level: > 55 dB


Switching Matrix and Conferencing:

  • Audio Routing and Switch: All Digital

  • Telephone Lines: 6

  • Hybrids: 4. All available when Livewire I/O is used, 2 available when analog or AES/EBU I/O is used.

  • Studio Inputs: 4

  • Studio Outputs: 4

  • Program-on-Hold: 2


ISDN Telephone Line Connectivity

  • Protocol Compatibility: National ISDN-1 and 2, DMS-100 Custom Functional, AT&T 5ESS Custom Point-to-Point, Euro-ISDN conforming to the NET 3/ETS300 protocol

  • Interface (one of the following)

    • USA & Canada Integrated NT1 for direct connection to ISDN line via the 2-wire U-interface (6-position/2-pin RJ-11 connector). 2B1Q line coding

    • Worldwide 4-wire S interface (8-position/8-pin RJ-45 connector)

    • Telephone Coding Modes

    • μLaw (ISDN Proto set to Natl I-1, AT&T Custom, Q.931mu or DMS Custom)

    • A-Law (ISDN Proto set to ETS-300)


Analog Telephone Line Connectivity

  • Universal interface for worldwide application. Programmable loop current, ring signaling, and flash time. Includes caller ID decoding using Bellcore 212 modem standard.


Desktop Director Ports

  • Four ports, permitting connection of 4 Telos Desktop Directors. Eight directors using external RJ-45 splitters and power.


Control Ports:

  • Ethernet 100Base-T

  • Web server for configuration and software update

  • Telnet for command line control and diagnostics

  • Call Screening Interface server allows up to 8 instances of call screening software to connect simultaneously

  • General purpose Input/Output: 15 pin D-Sub connector with 5 status outputs and 4 control inputs.


Two-Studio Modes 

Nx systems can be used with two studios independently. Lines may be independent or shared. Each studio controls two hybrids. There are two Program-on-Hold inputs, one for each studio. Two Broadcast Bionics Xscreen applications can be used independently.

  • With analog audio in/out, there are only two total inputs and outputs. So the Talkshow System must be used in a mode that combines the two hybrids assigned to each studio into one input/output. 

  • The AES option provides 4 input and 4 ouput channels total, so all hybrids are accessible with each studio using one AUS connection's two channels. Program-on=Hold remains and analog input. 

  • Livewire provides the full 4 hybrid channels, 4 hybrid output channels, and 2 Program-on-Hold inputs.


Power Supply

  • Type: Internal auto-ranging, 90–265 VAC auto-switching, 50–60 Hz.

  • Power consumption: 100 Watts.