For ECHOLINK, E-QSO,  All Digital Sound Card Modes

and Other VOIP Applications








ULI Board Features:

1. Completely PLUG & PLAY for use on Echolink, E-QSO, ISSTV, Plus All Digital Sound Card Modes (ie PSK-31, SSTV, RTTY etc).

2. ECHOSTATION compatible in half duplex mode.

3. Self-extracting windows software sent with board to adjust levels and functions.

4. Works as interface with all soundcard based software such as PSK31, WJST, RTTY etc. Modes are software selectable from a GUI (Graphical User Interface). Last set up is stored in EEPROM on the board for instant use on power up, other configurations are stored on the PC for recall in the GUI.

5. Can use VOX or COS (Carrier Operated Squelch) switching for the receiver squelch. The DC level of the COR is set 300mV steps from 0 to 7.5V using software control. The "open squelch" can be set to be above or below the COR threshold. This makes it very easy to interface the board to rigs with squelch outputs or even the RSSI/AGC line of a receiver.

6. Transmitter time out can be software selected in 10 second steps up to 10minutes. This prevents the TX staying on in a fault condition. The board itself is protected by a hardware watchdog which will automatically restart the microcontroller if the embedded program crashes.

7. Uses the more powerful PIC16F628 microcontroller that has a full interrupt driven RS232 UART (no more "bit bashed" compromises) and on chip voltage comparators for COR determination.

8. A speaker out jack with audio amplifiers and level control . Built-in audio monitoring with 1w output for listening to audio to and from radio.

9. Local microphone and PTT to allow transmission to be made from the radio or Internet without disconnecting cables or using a second rig.

10. A new Auxiliary Audio input concept. Audio into the Aux jack mixes with the primary audio so the two audio sources can be used simultaneously. This is a great feature for creative users of the board. DTMF Commands are also recognized through the AUX Input.

11.. The audio mixer has an active band pass filter to limit audio bandwidths to 300-3000Hz. This helps to eliminate HF noise from the soundcard and LF hum loop problems.

12. On board DTMF decoder. This is more reliable than software based decoding. DTMF tones can also be passed to the Internet for remote control of other ULI boards. By default the tones to the Internet are muted by the board.

13. Contains Latched optoisolator controlled touctone switch will be able to be setup in the software.

14. Computer reset circuit. An optically isolated PC reboot output is available which can be connected to the PC power switch. This will restart the computer if the PC software or Windows has crashed; this is detected by no polling being received by the ULI board for a programmable time period. For this to work the link software must be in the Windows start up file. The facility can be disabled in GUI software for programs that do not continuously poll the control board.

15. All cables go from the radio to the board and board to computer.

16. RJ-45 connector for use with the ICOM 706 and similar rigs. Just attached a Rj-45 cable to the board and the other end to the radio and no other connections are needed. The RJ45-8 cable will connect the ULI board to an ICOM 706 providing, TX audio, RX audio, PTT and the COR squelch! This will also work with other Icom, Kenwood and Yaesu radios with some or no modification of the cable.

17. Standard mono microphone and PTT jacks on board.

18. CAT control. Optically isolated CAT interface hardware and software to allow user defined commands to be sent to the rig. These could include changing frequency, power, mode etc or anything that can be done on the CAT interface.

Up to 7 user commands are available from either the radio input for local control of the board or preset CAT commands to be sent to the rig. Optional 4 digit "password" can be used to limit access to these commands.

19. Two way Touchtone decode option. The user can select the ability to decode touctones only from the RF side or from both directions. This is another feature that allow for further experimentation.

20. Built in Power Plug. This board has a bridge rectifier which is idiot proof. Power will be accepted either with the center positive or center negative. You won't have to be afraid of mixing them up.

21. Built in Serial Port Connector!!!

22. DPDT Relay for PTT Control (1-side) as well as experimental usage (for the other side).

23. Proper double sided PCB with a solid groundplane on the top, which avoid RF pick up you often get with cheaper single sided versions.

24. Operates off of 12V. Power connector and wire supplied.

25. 4LED's to indicate power, PTT, link operational and COR.

26. Board comes complete with instructions and block diagram for easy set up.


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If you would like to purchase a  ULI board


Email or call JIM, WB2REM for additional information


Phone # (609) 771-8070
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Call For More Information.