Comrex STAC
The telephone has always been essential to live broadcast. Studio Telephone Access Center (STAC) puts you in control of your talk shows, call-ins and phoners with great sound, ease of operation and scalable configuration.

STAC incorporates a pair of Comrex high-performance digital hybrids with automatic audio level control. The result is the most natural sounding telephone audio, even when conferencing multiple callers. A compact, rack-mounting mainframe houses the hybrids, the multiline controller and all telephone and audio connections.

The attractive, ergonomic control surfaces offer two operational modes, selectable with a flip of a switch:
Studio/Producer Mode provides both pre-air and on-air caller management. 
Screener Mode simplifies the task of screening and queuing callers. 
Powerful call management can be quickly mastered with minimal training. A single control surface is included for basic operation. For more demanding programming, up to four control surfaces may be used.

Call screening and control are available from any networked computer, using a standard web browser, with the included STAC IP. With STAC IP, your talent can host their shows from anywhere there is an Internet connection or you can economically create more control points from any computer on your local network. No additional computer is needed to serve the STAC IP webpage, as it is served from the mainframe. Your connections are secured by password protection and no dedicated client software needs to be installed. In addition to replicating the call status information on the control surfaces, STAC IP also provides fields for additional information about callers and text “chat” among those on your show network.

Innovative features include an Auto Attendant that automatically answers incoming callers with your custom message and puts them on hold; dedicated control surface buttons to designate the next caller to be placed on air and to activate an external recorder or delay; and program-on-hold audio.

The STAC12 mainframe and control surface are configured for 12 phone lines, while the STAC6 is configured for six lines. Expanding a STAC6 to a STAC12 in the field is quickly accomplished by installing a mainframe extension card and control surface “sidecars”. Read even more about STAC.

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The JK Audio Broadcast Host turns your desktop into a professional broadcast center. It contains everything you need to get talk show quality phone recordings into your mixer or sound card.

Connect a mic and headphones for a simple broadcast back to the station. Already at the station? Use Broadcast Host in your newsroom to record high quality interviews. Broadcast Host allows you to send mic and line level signals into the phone line while maintaining excellent separation between your voice and the caller. The stereo output jack on the back of the unit provides your voice on one channel and only the caller’s voice on the other channel. The balanced XLR output jack contains only the caller’s voice.

The digital hybrid connects audio signals to a standard analog telephone line without the transmit / receive crosstalk common to analog hybrids. The Digital Signal Processor (DSP) continuously monitors both the phone line and audio signals to deliver excellent separation. This proprietary, dual-convergence echo canceller algorithm can achieve excellent separation, typically exceeding 50 dB, without any setup and without sending a noise burst down the line.

Broadcast Host provides connections for a microphone, headphones, mixer, sound card, telephone and your analog telephone line. An auxiliary telephone is only required to place outgoing calls. The auxiliary telephone is disconnected when you press the “Call” button, and reconnected when you press the “Drop” button.

Broadcast Host features Auto-Answer/Auto Disconnect for use in IFB and monitoring applications. Other applications include telephone interviews, talk shows, church PA interface, and conference room full duplex applications.

Host           60JKHOST    MFR LIST $495.00
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JK Audio ComPack

If you need to get audio in and out of analog phone lines, PBX systems, even cell phones, you need the ComPack from JK Audio. Perfect for Remote Broadcasts, IFB feeds, or interviews over any phone connection, the ComPack also functions as a simple telecom interface for your beltpack intercom system. This no-frills feature allows you to connect the 3 pin male XLR to your beltpack intercom group. This provides a full duplex, always-on connection to any telephone network.

JK Audio innkeeper 1

Can you imagine a digital hybrid for only $780.00?  Enter the innkeeper 1! Perfect for radio or television talk shows, teleconferencing, or auto-answer IFB feeds, the innkeeper gives you excellent caller audio without the transmit receive leakage common to analog hybrids. All the common-sense features you’ve come to expect from a JK Audio product are present. With a front panel headphone jack and volume control, you can monitor the send signal, the caller’s voice, or a mix of the two. The output is also sent to the rear panel screw terminals, allowing you to add a monitor speaker. Connections include mic/line switchable XLR input, XLR caller output and an additional user defined XLR output.

JK Audio didn’t stop with the innkeeper 1.  The optional Guest Module 1 Remote Keypad designed exclusively for use with the innkeeper 1 gives you remote access to the on-hook / off-hook and dial features of the innkeeper.  The Guest Module connects to your innkeeper using an 8-pin RJ45 modular cable, which provides remote power, eliminating the need for batteries or an external power pack. 

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Excalibur HC-1 Handi-Coupler

Use the Handi-Coupler on remotes and around the station: on-air, production, the newsroom, the sales office, and in the sports kit. The HC-1 connects in series with the handset of any telephone using modular connectors. Since a connection to the telephone line is not required, the HC-1 can be used with almost any telephone in single or multi-line, modern electronic or

older key systems.

Pressing the front panel button disconnects the handset and connects the external audio in/out jacks to the telephone. Releasing the button reconnects the handset, allowing normal use of the phone. External audio is connected via separate input and output jacks. Both inputs and outputs are 1/4" TRS jacks wired so that you may use either balanced or unbalanced connectors.  

Please note:  This is not a telephone hybrid.  It is not suitable for conversing with telephone callers on-air.  If you want to put a phone caller on the air or record two-way interviews, consider one of the products on this page referred to as a "hybrid". 

AlfaThai Knows Telos

For longer than any other supplier, AlfaThai has brought you the power and audio quality of Telos phone interface equipment. From the latest digital codecs to sophisticated hybrids, to muscular multi-line systems, Telos is in the vanguard, and AlfaThai knows Telos best! Call us to learn more about the fine products of Telos.

Telos Two ISDN Hybrid

Once again, Telos has raised the standard for on-air telephone quality.  This Telos Two ISDN Hybrid exploits the all-digital capability of modern telephone networks, providing ISDN connectivity between the studio and the telco Central Office.  Performance is superior to the all-analog equivalent, because only the far-end analog caller lines need conditioning.  This means more gain can be inserted between calls before there is a feedback problem.

The Telos Two ISDN Hybrid is two independent hybrids in one unit, with true conferencing capability.  Adaptive echo cancellation is provided, resulting in improved trans-hybrid loss.  The unit provides familiar Telos hybrid features, including balanced XLR analog and AES/EBU I/O, dynamic EQ with caller AGC, and adjustable caller ducking.  A built in ISDN terminal adapter makes interfacing easy.  Two mic/line inputs are provided, with phantom power, if desired.  Call 66-081-791-8488 for Your Best AlfaThai price

Telos Two-x-Twelve ISDN/POTS Talk Show System

Although telephone providers have had all-digital transmission networks for years, hybrids with analog-only phone line inputs force you to convert them back to analog. Until now.   

The new TWO-x-Twelve Talk Show System is the only multi-line talk show system that lets you bring ISDN lines right into your studio for improved performance. This systems contains everything needed for successful talk show operation. Included are two full-conferencing high-performance digital telephone hybrids and a 12-line (TWO-x-Twelve) broadcast phone system. 

The advanced ISDN hybrid technology pioneered by Telos manifests itself in an integrated suite of audio processing functions that achieve amazing results from the diverse types of telephone connections found in the  real world.

System Components:

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Eventide BD500 Digital Broadcast Delay

Thousands of broadcast users made suggestions for Eventide’s next model, and here’s the result, a stereo delay with an enhanced version of their exclusive automatic catch-up circuitry, optional digital I/O, and many conveniences.

When you push DUMP, you no longer have to worry about a few moments of unprotected airtime while the delay re-builds. The BD500 lets you divide the delay time into segments.

Each time DUMP is pressed, only one segment is dumped. If another naughty word is spoken right away, push it again to dump the next segment of delay. So you might set up three segments, like this: [3 seconds], [3 seconds], [2.5 seconds], each an extra level of protection.

Standard stereo delay is 8.5 seconds, and more can be added. A new sneeze button edits audio to your delay, so the host can cough or make an aside without being heard and without a pause. Most front panel switches can now be remoted.

Analog XLR’s are standard, with digital AES/EBU available optionally. It’s all in one rack unit, and all built around Eventide’s great algorithm that catches up quickly without degrading your audio.

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Telos Direct Interface and 1A2 Interface Modules

Here are two powerful choices for selection and control of multiple telephone lines in broadcast systems. 

The Direct Interface allows direct connection of up to 10 phone lines. It functions as a full broadcast phone system including program on hold and caller conferencing.

The 1A2 Interface Module makes use of standard 1A2 key telephone equipment. Each handles 10 phone lines and units can be coupled to handle up to 30 lines. Software upgrades for both interface modules add several functions such as AUTO-ANSWER, which automatically answers incoming calls and places them on hold.

The desktop Switch Console offers extensive line control, remote tape machine start/stop, and a BUSY-ALL mode that is great for clearing all lines before a contest. Other control options include drop-in modules for BE, PR&E, and other popular radio consoles. Screen your callers with phones, or use the powerful Assistant Producer software, described above.

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Comrex Telephone Couplers

These couplers provide clean transformer connections between your telephone lines and external audio equipment. Designed for send-or receive-only applications, they have modular telephone jacks for the phone line and for a telephone set.

The TCB-1 Manual Coupler provides a switched hold connection. Balanced audio input or outputt is on a single 1/4" TRS connector. The unit does not require power.

The TCB-2 Auto-Answer Coupler answers the telephone line on the first ring and disconnects that line when the caller hangs up. An A/C power supply is included. If your CO does not provide loop drop, order the optional dial tone detect board.

Please note:  These are not telephone hybrids.  They are not suitable for conversing with telephone callers on-air.  If you want to put a phone caller on the air or record two-way interviews, consider one of the products on this page referred to as a "hybrid". 

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COMREX DH Series Hybrids

The DH20 is an inexpensive digital hybrid designed to connect a telephone line to audio equipment. It includes several features only available in more expensive units, such as selectable caller control and auto answer/disconnect.

The DH22 performs the functions of two digital hybrids in a single rack mount unit. In addition to including all features of the DH20, it provides two interfaces to allow call conferencing of two telephone lines. Automatic Gain Control adapts every call to ensure the best quality audio.

The new DH30 is a full-featured, programmable digital hybrid with record and cue functions. AES/EBU connections allow you to establish a direct link between the DH30’s digital signal processor (DSP) and a digital console. Audio processing functions include equalization, expansion, compression, bass-boost, and auto ducking. The DH30 also features selectable auto mix-minus and acoustic echo cancellation.

(Note: Older versions of the DH-20 and DH-22  require talk battery to function. They will not work with handset adapters, switches, or PBX extensions that provide only a dry line.)

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Excalibur Hybrid Adapter

Use your favorite broadcast hybrid with most any phone: old, new, single or multi-line. It hooks up through the handset connector. With the button out, your phone works as normal. With the button in, the handset is disconnected and your hybrid is on line. The performance of the hybrid is the same as though it were connected directly. Connectors are modular phone jacks.

(Note: Will not work with Gentner DH20, DH22, or SPH10 Hybrids.)

Sound America R/SVP

News, sales, and PR types will use the Record/Send Verywell Phone. It’s a classic TouchTone ä desk phone with a coupler built in, so you can connect a cassette recorder or other source direct to the phone network. Feed your audio down the line-use the handset to mix in voice or switch it to mute.  Also record phone conversations or make voice mail messages with music added. Mini 1/8" jacks for send and receive are provided. SVP is a send-only version.  Want a push-to-talk handset? Order the PT-1 option with either model.

Radio Systems TI-101 Interface

You’ll find this affordable telco interface easy to install and set up. Connections are XLR for audio, banana posts for phone. Popular with smaller stations, this is a solid choice when you’re watching the dollars carefully.  Connect pro audio mixers to phone lines and eliminate feedback and gating problems. Caller equalization, send limiter, caller mute, and conference linking are standard. The factory support from the folks at Radio Systems is very good.

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Telos 100 Delta Digital Hybrid

The digital signal processing of the 100 Delta includes a dynamic digital equalizer that examines the caller audio in three frequency bands within the context of the overall signal. The high and low bands are automatically equalized with reference to the mid band. The 100 Delta also boasts logarithmic (dB) dynamics control and context sensitive AGC. Together these processes offer increased caller intelligibility and matched levels.

The 100 Delta has two mixed inputs (one line level and one mic/line) and two outputs (one with caller audio and the other with a continuously adjustable mix of caller and mix-minus). This simplifies the creation of external mix-minuses. DUPLEX DEPTH can be adjusted for full-duplex, half-duplex, or any point in between. Two DEPTH settings can be stored and remotely selected.

This allows remote switching, between a setup requiring more depth for maximum feedback suppression, and one where feedback is not a concern and maximum duplex conversation is desired. The 100 Delta performs well on even the toughest phone lines thanks to its extraordinary trans-hybrid loss and sophisticated processing.

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Telos ONE-x-Six System

The ONE-x-Six is a phone system with all of the phone interface gear needed for talk show programming. A compact housing holds both a Telos ONE digital hybrid and a six-line broadcast phone system.

Use the ONE-x-Six to place calls, put callers on hold or on the air, and to conference. The system has sophisticated automatic gain control, super trans-hybrid loss of better than 40dB, program on hold feature, and special functions including control of external recorders and delays.

The ONE-x-Six is ideal for talk shows that seek Telos quality but don’t need the even greater sophistication of the Telos Direct and 1A2 Interface Modules. Switch Console not included.

Telos ONE Digital Telephone Hybrids

 One of the best values in telephone hybrids anywhere, and year after year a customer favorite thanks to automatic adjustment to each call, sophisticated AGC on input and output, an advanced downward expander on the caller audio, and digital processing to reduce dramatically the chances for feedback when monitoring with open speakers.

Telos ONE has two outputs and a switchable mic/line input. Choose between rack mount and modem case versions, which can also rack mount with optional hardware.

The ONE plus ONE starts with two Telos ONE digital hybrids in a single rack unit chassis. Each hybrid functions independently. An internal mix-minus matrix cross couples the outputs of the two hybrids. In a dual hybrid application, you need only send the ONE plus ONE a single mix-minus.

All of the Telos ONE features are included.

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Telos Hybrid Accessories

The Auto-Answer board has simple line SEIZE and DROP.  The Super Auto-Answer features remote control of line SEIZE and DROP,  selectable number of rings before answering, dial tone detector for failsafe line drop, DTMF decoder with open collector outputs, and other features. A special Super Auto-Answer version allows users of 1A2 Key Systems to select phone lines using a standard multi-button desk set. Either can be used with the Telos 100 Delta, ONE, and ONE plus ONE. Call 66-081-791-8488 for Your Best AlfaThai price