Unicom Data Mode Interface

Table of Contents

Your Digital Radio World Dream is Here!

Main Features

  • Compatible with any radio by ordering a fully assembled detachable radio cable.
  • Compatible with every soundcard equipped computer.
  • Works with every present or future HAM radio soundcard-based data mode software.
  • Works with every present or future CAT (Computer Aided Transceiver) control software.
  • Works with every present or future radio programming or firmware upgrading software.
  • Properly matched and easily precise adjustable audio to any radio.
  • Advanced circuit design and cable shielding for RFI product suppression.
  • Bidirectional transformer isolation of input and output audio signals.
  • Galvanic isolation of PTT, CW, SQL and FSK (RTTY) signals through the ADuM4160 USB digital isolator.
  • Positive and fully automatic PTT control supported by almost all HAM radio programs.
  • True FSK keying output for direct RTTY keying of your radio through the Virtual COM-Port.
  • True CW keying output for direct CW keying of your radio through the Virtual COM-Port.
  • Independent Squelch input (CTS line of the Virtual Com-Port).
  • Two independent RX audio channels.
  • Complete front panel LED indication.
  • Comfortable front panel precise adjustment of all audio channels.
  • Ability to use an external PTT pedal.
  • Ability to use an external electronic CW keyer.
  • Ability to use a VOX function of your transceiver instead of PTT control.
  • No external power supply needed, great for portable or QRP installations.
  • High quality and professionally designed fibreglass printed circuit board.
  • Convenient, small, light and durable metal case.
  • Box Dimensions: 128 x 68 x 27 mm. Weight: 280g (without cables).
  • Highest quality pre-wired and tested cables to fit any available radio on the market.

Fully Isolated Computer Ground Circuit

The Unicom Interface features a fully isolated computer ground circuit, unlike other interfaces that require extra ground screws, extra wires and extra cables in an attempt to eliminate ground loops.

Supports All Available Data Modes

Communication technologies that are specifically designed to improve «live» HF keyboard operation can now be achieved that were previously only theory or too complex to be practical. Thanks to the generosity of radio HAMs with programming knowledge, and to the World Wide Web, new and powerful communications tools are available to all HAMs. The evolution and wide spread use of the Personal Computer with a digital sound card for DSP, is allowing us to use these tools to «push the envelope». The distinguishing features of live HF digital operation today are the use of lower power, compact or indoor antennas and courteous operating technique. This reverses the trend of several years ago…

Data modes are at the cutting edge of radio communications, making maximum use of the limited and precious band space. And with modes like PACTOR and PSK31, you will be amazed how it is possible to pull signals out of the noise and decode them 100% when normal voice communications is impossible.

The Unicom Interface is a completely new way of getting into data modes with the minimum of outlay. In effect, it enables you to connect your receiver or transceiver directly to your PC and operate a selection of data modes. No external power supply is required. Components are of the highest quality and the unit underwent the stringent quality control and inspection standards. The Unicom Interface features a fully isolated computer ground circuit, unlike other interfaces that require extra ground screws, extra wires and extra cables in an attempt to eliminate ground loops. The complete set includes the Unicom Interface and the appropriate cable for the specific transceiver model.

Any computer with Windows 98/ME, Windows 2000/XP/Server2003 (32 & 64-bit), Windows Vista/7/8/8.1/10, WinCE 4.2-5.2, Windows Mobile 6, Windows Mobile 5, PocketPC 2003, Mac OS 8/9/10, Linux, etc. and compatible soundcard will work with this interface. The unit has all the cables you need, and is ready to go. Simply download and install the software for the mode(s) that you want to try, chipest driver, plug in the supplied cables, and you are set.

Presently available ham radio sound card software, the Unicom Interface, a radio and a computer is the easy and modern way to operate all available data mosed such as PSK31, PSK63, PSK125, FT8, MFSK8, MFSK16, MT63, THROB, Feld Hellschriber, PSK Hellschriber, FM Hellschriber, Duplo Hellschriber, Concurrent MT Hellschriber, Sequential MT Hellschriber, SSTV, FAX, WEFAX, RTTY, AMTOR/SITOR, ASCII, PACTOR, G-TOR, HF and VHF PACKET, APRS, CW, SSB Contest Voice Keying, FSK, WSJT FSK441, WSJT JT44, JTMS, ISCAT, JT6M, JT65, JT4, JT9, QRA64, FT4, CW High Speed Meteor Scatter, NAVTEX, Q15X25, Olivia, Contestia, Domino and many others.

Perfect Modem for EchoLink

The Unicom Interface fully supports EchoLink communication and is the best modem for your setup.

EchoLink® software allows licensed Amateur Radio stations to communicate with one another over the Internet, using streaming-audio technology.  The program allows worldwide connections to be made between stations, or from computer to station, greatly enhancing Amateur Radio’s communications capabilities. 

Rig Control and Programming

The CAT control part of the interface is based on the FT2232D, the 3rd generation of FTDI’s popular USB UART/FIFO I.C. family. This device features two Multi-Purpose UART / FIFO controllers which can be configured individually in several different modes. It is designed specifically for CAT (Computer Aided Transceiver) system, which controls transceiver frequency, mode and other functions by computer, supporting Icom, Ten-Tec (CI-V), Kenwood (IF-232C) and Yaesu (FIF-232C) transceivers. It may also be used to program and clone various hand-held, mobile and base radios.

The Unicom Interface communicates directly with a PC through the now popular and standard USB interface. It emulates 2 (two) Serial Ports communicating with a radio at TTL voltage levels. A Serial Port connection is not needed since the interface emulates one for you. The Unicom Interface is compatible with all versions of Windows® that support USB operation.

USB, Universal Serial Bus is very easy to use providing a reliable and effective means of transferring data. Whether USB 1, USB 2, USB 3 or even USB 4, the data requires a standardised method of transfer over the USB interface along with a standard format for the USB data packets. The Unicom Interface is compatible with all USB protocols. Two virtual Serial Ports are created after FTDI driver installation, so that any Windows, Mac, Linux based rig control software that is compatible with your computer and radio may be used.

The Unicom Interface contains the required level converters for most Alinco, AnyTone, Baofeng, Barrett, Codan, Elecraft, Entel, FlexRadio, Harris, Hytera, Icom, Kenwood, Kirisun, Midland, Motorola, Philips, Recent, Relm, Simoco, Standard Horizon, Tait, Ten-Tec, TYT, Uniden, Vertex, Wouxun, Xiegu, Yaesu, and other radios, so the original level converters (e.g. CT-17, CT-29, CT-62, OPC-478) are not required anymore.

The interface uses a convenient pocket sized metal box design, with a pre-wired and tested cable to fit your radio. Cables are available for all CI-V, IF-232C and FIF-232C controllable and programmable radios.

The FTDI’s Popular USB UART Chipset Family

The FT2232D is the 3rd generation of FTDI’s popular USB UART / FIFO IC family. This device features two MultiPurpose UART / FIFO controllers which can be configured individually in several different modes. As well as a UART interface, FIFO interface and Bit-Bang IO modes of the 2nd generation FT232BM and FT245BM devices, the FT2232D offers a variety of additional new modes of operation, including a Multi-Protocol Synchronous Serial Engine interface which is designed specifically for synchronous serial protocols such as JTAG and SPI bus.

Virtual COM port (VCP) drivers cause the USB device to appear as an additional COM port available to the PC. Application software can access the USB device in the same way as it would access a standard COM port. Installation guides are available from the Installation Guides Page of the Documents section of the FTDI site for selected operating systems.

Setting Up Your Software

We do not write software for radio programming or interfacing a radio to a computer. We also cannot properly support software, only the author of that software can. Presently we do not make radio transceivers or computers so we cannot support these products either. Do not plug the Unicom Interface in until you have installed the FTDI driver! After installing the driver, assure that the interface is plugged in.

The following information is provided as general guidelines for setting up PTT, rig control or programming. Please refer to your radio’s manual and your software’s documentation or help files for specific information.

The COM port number, assigned to the Unicom Interface by the operational system must be set for PTT, rig control or programming to function. Open the Device Manager (located in «Control Panel» then select the «Hardware» tab and click on «Device Manger») and select «View > Devices by Type». The device appears as an additional COM port with the label «USB Serial Port». You will need this COM port number to setup your program so that it may communicate with the Unicom Interface. If you plug the interface into different USB port, each USB port will have a different COM port number assigned to it. You may use several Unicom Interface devices with one computer and several radios, each with a different COM port assignment.

A radio’s menu settings may have been changed from the radio manufactures default setting. Check this, it will cause a rig control communications problem even if the software is set correctly for that make and model radio. Most modern radios have these menus that allow changing computer control settings. Simply selecting the correct make and model of your radio in the control software does not insure that it will match the radio if the radio’s default menu settings as the defaults may have been altered.

Check the baud rate and in the case of a CI-V radio, that the address is correct for the radio model. Icom radios have menu functions where you may set not only the baud rate but also the CI-V address to something other than the default. Each Icom model comes with a unique default CI-V address that should be set to the default but may be altered via the radio’s menus for special applications.

It is best to refer to your radio’s manual and to set the radio to the default settings of what a new, out-of-the-box, version of that radio would have. At least check to see that it is set to the default. Any setting for the radio, other than the default, will cause the default setting of the software, for that radio, not to work.

Supporting Software

A lot of radio programming, CAT control and data mode programs are available online. Most of these are «freeware» or «shareware» and in many cases provide a level of performance beyond your wildest dreams! The Unicom Interface works with all of them such as AALog, AATest, AAVoice, Accessible Digipan, AGWPE, Airlink Express, Analyzer 2000, ARC2, ARC3, BTL Blaster TeLetype, Chip64 (IZ8BLY), ChromaPIX, cocoaModem, Commander (DXLab), CONTACT-DX, CONTACT-MULTI, Contact PSK (EA1CUI), CQ Log, CT, CwGet, CW Skimmer, CwType, CYBORG, DarwinPSK, DigiPan, Digital Master (Ham Radio Deluxe), DIGTRX, DroidPSK, DX4WIN, DXBase, EchoLink, ERW4C, EssexPSK, Eurowinlog, FDMDV, Fldigi, FlexNet32, FNpsk (W1FN), FSQCall, FTBasicMMO, FTBCAT, FTBVR5K V2, gMFSK, GRITTY, Ham Radio Deluxe, HamComm, Hamport (AALog), HamScope, Hellschreiber (IZ8BLY), HF Pager, Jason (I2PHD), JS8Call, JT65-HF HB9HQX-Edition, JTDX, JVComm32, KC9L PSK, KWRTTY, LanLink, LinPsk, Logger32, LOGic, Lux-Log, MAP65, MF TeleType, MixW, MM-DSP, MMSSTV, MMTTY, MMVari, MRP40, MPSKWIQ, Mscan Meteo, MSHV, MultiMode, MultiPSK (F6CTE), N1MMLogger, N3FJP Loggers, NA, NBTV (Narrow Band Television), OH2GI-HAM System, Packet Engine Pro, PhaseShift, PSK31 (G3PLX), PSK31LX (DL9RDZ), PSK Express, QuikPSK (KH6TY), RadioCom (Bonito), RCKRtty, RoMac, ROS (EA5HVK), RTTY (WF1B), Scancat-Gold, SD, SeaTTY, Sigmira, SimJT, SMARTPSK, SuperControl, THROB (G3PPT), TR LOG, TrueTTY, TRX-Manager, TWPSK (WA0EIR), VARA (EA5HVK), W1SQLPSK, Wdecode, WinDRM, Win-EQF, Winlink Express, WinPSK (AE4JY)WinPSKse (KA1DT), WinWarbler, WOLF (KK7KA), WO-PSK, WriteLog, WSJT, WSJT-X, WSPR, WS Tools (G4KLX), YG-PSK, YPlog, Zakanaka and many other radio programming, CAT control and data mode programs.

When setting up your software please use the following virtual COM Port A/B lines:

  • CAT - TxD and RxD Lines (can't be used simultaneously on both ports)
  • PTT - RTS Line
  • CW - DTR Line
  • SQL - CTS Line
  • FSK - DTR Line

The maximum guaranteed baud rate is up to 57600 bits per second (bps). Most of the radios require lower numbers such as 4800, 9600, 19200, 38400. Please refer to the manual of your radio. If your radio supports true FSK (Frequency Shift Keying) mode you can use MMTTY or other compatible software with the EXTFSK application.

Single Point Bonded Common AC Ground

Make sure that your computer and you ham station have a common AC ground that is bonded at a single point. This means that all station grounds and AC grounds must be at a single low impedance point. Any AC leakage or voltage between multiple grounds could damage your radio, computer or the Unicom Interface when connecting the system together. This is true of all station interconnections and accessory installations.

Having the AC service ground on one side of your house and another ground for your antenna on the other side of your house creates dangerous ground loop if not bonded together at a single point. This huge ground loop (loop antenna) could pick up the electromagnetic pulse of a near-by lightning strike and induce a huge electrical spike directly through your equipment. If your equipment is effectively connecting two ground systems together instead of being connected to a single point ground you are asking for trouble. Disconnecting your antennas for thunder storms will not protect you if you have a station ground that is at a different location from your AC house ground.

Be careful not to bump or stress the Unicom Interface sticking out of your USB port as this could physically damage your computer’s USB connector, or the interface itself. Do not allow the interface to get wet or to use it in humid locations.



We recommend placing the interface as close to the radio and computer as possible. Do not place this unit within one foot of power transformers, video monitors, or anything that emits strong varying magnetic fields. If you locate this unit near a monitor, the sweep circuits can introduce hum and noise into your signal. If there is a power line operated transformer within several inches and if it has flux leakage, 60-cycle hum can be introduced into your station’s audio systems. Be sure your station ground is good, all the equipment is grounded together properly with a wide smooth conductor, and you have followed all station wiring suggestions found in reliable sources such as the ARRL Handbook. Check the sound card volume control settings and the gain settings of the radio. Be sure they are close to normal operating settings, and not set too high.

Correct Audio Settings

One of the most common problems using digital modes is improper system level. Even at best, digital modes have limited dynamic range compared to modes that closely «fit» filter bandwidths in the transmitter and receiver. When the radio filter is wider than the mode being used, the system depends heavily on having absolutely no distortion at any place in the system. Adjustments and levels throughout the entire system affect bandwidth and quality of transmitted and received signals.

When transmitting, it is extremely important to use correct gain levels. If the input of a transceiver is overdriven, the signal will contain unwanted products. Problems might not show on spectrum or IMD displays and if they do, many people do not recognize them. Excessive level into the radio can aggravate harmonic distortion (this often does not register on IMD or displays), causing transmissions on multiple frequencies. For example a PSK transmitter using 1,000 Hz offset will have some signal level at 2,000 Hz and every other multiple of 1,000 Hz. These harmonics might make it back through a narrow filter, and while they cause others interference they will not show on a spectrum display! The same is true for poor carrier suppression. Since the carrier can be outside the pass band of a receiver, it will not always show on displays of people you are working.

Problems also occur when audio levels are too low. If audio level from the sound card or interface is too low, the ratio of signal to hum and/or noise will also be reduced. The proper setting is generally one that allows the microphone and receiver gain to be set at normal operating levels for SSB. Power is reduced or adjusted by fine-tuning levels with the controls inside the Radioarena UnicomDual. The best way to check for proper transmission is to listen to your own signal on a separate receiver. Use a narrow filter, and take care to avoid overloading the receiver. If you cannot listen through a separate receiver, the best general guideline is to use normal microphone gain settings and approximately half volume on the sound card «Volume» settings. Adjust the transmitter level control in the Unicom Interface for normal transmitter drive (just at the start of ALC action) and use the microphone gain on the transmitter (or sound card volume) for fine adjustment.

Use a normal receiver volume setting, and adjust the sound card microphone level (make sure any extra gain options are off) to approximately half scale. Regardless of what you do, it is always a good idea to have someone listen to your signal when the band is empty, signals are strong, or noise is very low. They should look carefully for spurious signals, noise, and hum. When transmitting on modes like MFSK and PSK, always try to use a frequency setting of more than 1500 Hz and less than 2500 Hz. This will allow the transmitter’s SSB filter to suppress unwanted harmonics from the audio system driving the transmitter. Remember it is sometimes necessary to select the narrowest filter possible in the receiver, rather than depending on the computer to filter out strong unwanted stations. If you depend only on the sound card, you will find that even very clean strong signals overload your system. The problem is often in your receiver system, not in the offending transmitter. Many transceivers allow a selection of narrow filters while operating SSB, or include pass band tuning controls. If you have trouble with a strong station nearby causing interference, try to use more selectivity or use the receiver’s notch filter to reduce the signal level.

You must have a 16 bit sound card installed in your computer to use digital mode programs. Read the documentation with the sound card for full instructions on the use of this card in general. Find the mixer control panel, which may be a program that was supplied with the soundcard or it may be part of the Windows Control Panel. Learn how to adjust the soundcard playback output level and the record input level using the mixer panel: these controls will be used to set the levels for Digital Modes. The modem is feeding audio direct from the soundcard output to the AF input. There is an adjustable attenuator of about 100:1 ratio to reduce the 1 volt output of the soundcard down to 10 mV for the AF input. Do not use a speech processor with Digital Modes. When you have reached the correct setting, you will see that changing from the tuning tone to typing text, will make the transmitter power swing from 50% (no typing) to 100% (typing or tuning-tone). This change in power is correct. It’s quite OK to let the transmitter ALC line operate on digital modes. The ALC line will control the drive level without clipping in the same way that it does on voice operation.

To check that the receiver output is not overdriving the soundcard, tune to a strong steady carrier to give 1,000 Hz audio tone, with the RF gain of the receiver at maximum so that the receiver AGC line is fully operating. Check that the waterfall shows a single vertical white line with no red. Reduce the soundcard input gain in the mixer control panel if you see red lines on strong signals (DigiPan example). To complete the soundcard setup for use with digital modes, the soundcard sample rate needs to be set.

A key defining characteristic of any digital audio signal is its sampling rate, usually just called the sample rate. This refers to how frequently the analogue signal is measured during the sampling process. If you think about it, the reason why this is important is obvious: imagine that you had a recording of someone speaking, and you sampled the recording once per second. You’d end up with a lot of choppy noise. The more frequently the signal is sampled, the better the approximation to the original sound. However, the higher the sample rate the more memory is required to store the samples, so you don’t want to sample more than is necessary either!

Front Panel Indication and Regulation


Indicates the interface power-on status.


Indicates the CAT PC-Radio data transmission.

Green RxD LED

Indicates the CAT Radio-PC data reception.

Yellow CW (FSK) LED

Indicates CW (FSK) signal transmission.


Indicates the radio transmission-on status.

RX-2 Potentiometer Knob

Regulates the second channel audio level from the radio to the PC's sound card by a potentiometer.

RX-1 Potentiometer Knob

Regulates the first channel audio level from the radio to the PC's sound card by a potentiometer.

TX Potentiometer Knob

Regulates the audio transmission level from the PC's sound card to the radio by a potentiometer.

Rear Panel Connections

3.5 mm AF IN Socket

Connects the supplied audio cable fitted with 3.5 mm stereo jacks to the PC's soundcard audio output socket.

3.5 mm AF OUT Socket

Connects the supplied audio cable fitted with 3.5 mm stereo jacks to the PC's soundcard audio input socket.

DB15F Connector

Connects the interface and your radio by the fully assembled cable with all the appropriate plugs.

3.5 mm KEY IN - PTT IN Socket

Can be optionally used for an external PTT pedal (3.5 mm audio jack ring) or an external electronic CW keyer (3.5 mm audio jack tip).

USB IN Socket

Connects the interface and the PC by the supplied USB A/B premium cable with ferrite chokes.

The PCB is fitted in a convenient and durable white metal box. All the indicators and adjustable knobs are located on the front panel, and all the connectors are located on the rear panel. The Unicom Interface and your radio are connected by the fully assembled detachable radio cable terminated on one side with a DB15M connector and with the appropriate plugs for the specific radio model on the other side (supplied separately). The audio cables are fitted with 3.5 mm Stereo Jacks. They should be connected to the PC soundcard socket. This connection allows the computer to send/receive the audio signals to/from your radio.

Block Diagram of the Interface

A unique feature of this interface, in contrast to many other ones, is that it provides complete galvanic isolation of the computer and the transceiver.

The capabilities of the interface allow almost full control of any available on the market transceiver or receiver (CAT, PTT, SSB, CW, FSK, RTTY, SQL, and all possible digital modes) through various computer applications, if this is not limited by the design feature of the particular radio. Additionally, the Unicom Interface can be used as an unbeatable radio programmer or firmware upgrader.

The interface’s speed characteristics can be checked by the Hyper Terminal – a terminal emulation program that cames with the Windows 98 and Windows XP operating systems or can be freely downloaded online. The interface output during testing is loaded to the real load. In a real connection computer – interface – transceiver, the speed may be different and will depend on the program settings, as well as on the model and settings of the transceiver. As a rule, the recommended baud rates are indicated in the manual of the particular transceiver.

The PTT, CW and FSK circuits can be controlled from either port or both at the same time, since the RTS and DTR outputs of both ports are «OR gate». Due to the two-port interface configuration, it is possible to work with two programs simultaneously – each program on its own port. It should be noted that more than one running program cannot be connected to one port and the simultaneous operation of CAT in both ports is not allowed!

As mentioned above the Unicom Interface provides complete galvanic isolation between the computer and the radio. In the audio line this is realized using 1:1 audio transformers, and on the PTT, CW, FSK, SQL and CAT circuits – by the ADuM4160 USB Digital Isolator. The PTT, CW and FSK output lines are made according to the open collector circuit with a permissible sink current up to 400 mA. The input and output circuits are protected by high speed diodes and zener diodes. There is LED indication of CAT (RXD, TXD), PTT, CW (FSK) and PWR. The interface circuits are powered from the USB port through an isolated DC / DC converter.

The interface is connected to a computer via a USB port and a sound card. All three LF audio channels are made on LM-NP-1001 BOURNS transformers. The resistance of the windings to direct current is about 60..70 Ohm, at a frequency of 1000 Hz – 600 Ohm, the transformation ratio is 1: 1.

To exchange data via USB, you can use previously created input programs designed to work with a COM port, provided that these programs correctly access the serial port through standard WIN32 API functions. In this case, the modification of the program will consist only in changing the serial port number. All the computer cables are included in the package. As mentioned above the unit requires a Virtual COM Port (VCP) driver. 

Each interface should be connected to the same USB connector, since changing the connector changes the Virtual COM port number. It should be borne in mind that when you disconnect the USB cable, the Virtual COM Ports will disappear and will reappear automatically when you reconnect the cable.

If, when the USB cable is reconnected, the PTT and CW indicators blink for a while and then go out, then the driver is installed and the computer has successfully established a connection with the interface and this indicates that the computer-interface system is working correctly.

Interface Connection

  1.  Connect the supplied audio cables fitted with 3.5 mm stereo jacks between the interface and the computer’s sound card, guided by the marking of the cables’ ends.
  2.  Connect the Radio Cable to the interface (DB-15 connector) and the opposite end to the corresponding connectors of the radio.
  3. Connect the USB cable. The PTT and CW indicators blink for a while and then go out – this means that the computer has successfully established a connection with the interface, which indicates that the system is working correctly. The PWR indicator should be on. If at this moment the transceiver is on, then it will go to TX several times, this is normal.
  4. When setting up the program, keep in mind that both COM Ports A and B can be used for: CAT (Computer Aided Transceiver), the TxD and RxD lines; PTT (RX/TX), the RTS lines; CW (FSK), the DTR lines. Important! Use these COM Port lines in the software settings! One COM Port has to be used with one software. Don’t try to connect more than one program to one COM Port!
  5. As mentioned above if your radio supports true FSK (Frequency Shift Keying) mode you can use MMTTY or other compatible software with the EXTFSK application.
  6. Double check the radio settings as mentioned above. Adjust them accordingly if required. Check the set baud rate of the CAT system in the transceiver settings and set it in accordance with the recommendations for the given transceiver model. The same value should be used in the program settings.
  7. Two programs can work with the Unicom Interface at the same time – one with the lower COM Port, the other with the higher one, but the simultaneous operation of CAT in both ports is not allowed! Only one program can work with one port at a time. If another program is configured on the same port and there is a need to run it, then the previous program should be closed.

Radio Cables

Unicom Data Mode Interface Radio Cable

All our radio cables made for the Unicom Interface are fully screened and of the top quality, professionally pre-wired and tested. Each cable connects directly between your radio and the interface. Each cable features a standard DB15M connector at one end and the appropriate plugs for the specific radio model on the other end. Unicom Interface works with any radio available on the market of all brands such as Alinco, Codan, Elecraft, FlexRadio, Icom, JRC, Kenwood, Recent, Ten-Tec, Vertex, Xiegu, Yaesu, etc. We can build and supply a top quality custom made radio cable for any available HF / VHF / UHF desktop, mobile or handheld transceiver, receiver, scanner or even a repeater. All you need is to tell us the model of your radio while ordering the interface. 

DB15 Connector Pinouts

You can order a required radio cable while you ordering the interface, you can order a radio cable separately for your second radio. You can come back later on to us and order another radio cable if required. All you need to do is to tell us your radio model!

Support and Warranty

If you have any problem with the Unicom Interface first check the appropriate section of this page. If this manual does not reference your problem or your problem is not solved by reading the source, you may contact us by a message form listed on our website. Please send a complete description of your problem, an explanation of exactly how you are using your unit and a complete description of your station and software setup.

The Unicom Interface is warranted to be free from manufacture defects for a period of 12 months from the date of purchase. Subjecting the device to conditions beyond the parameters listed above will invalidate this warranty. The Unicom Interface is a static-sensitive device, anti-static procedures should be used in the handling of internal parts of this device. All our interfaces are extensively tested at the time of manufacture to be free of defects. Unicom Radio is committed to providing products of the highest quality. Should you experience any product quality issues with this interface please contact our quality assurance manager via the Contact Us page.


The Unicom Interface should not be used in any situation where its failure or failure of the PC or software controlling it could cause human injury or severe damage to equipment. This device is not designed for or intended to be used in any life critical application.

This product and its documentation are provided as-is and no warranty is made or implied as to their suitability for any particular purpose. Unicom Radio will not accept any claim for damages arising from the use of this product or documentation. This page provides information on our product and all efforts are made to ensure the accuracy of the information contained within. The specifications of the product are subject to change and continual improvement.