Separate A2T audio card                          ORDER NOW!

Remember that RTE/FXO = RTE + A2T     (caseless RTE/FXO shown)

•  Audio interconnect card serves as companion audio card to the RTE controllers (will not function without an associated RTE controller)

• Audio To Telco (A2T) connects radio audio via telephone line or Internet connected phone line via a user-supplied ATA (Analog Telephone Adapter). The ATA simulates a wireline FXO connection and does not need a computer. A2T plugs directly into ATA FXS jack or POTS wireline. Please note that the A2T is not a VoIP adapter itself.

• 8 pin modular connector with cable connecting to 8 pin modular or 8 pin round microphone connectors
• 1/8" monaural jack for speaker audio connection
• 6 pin standard (RJ-11) telco/FXO jack
• Relay audio direction switching that follows the system PTT lead 
• Transformer coupling to eliminate hum pickup.
• 12v DC at 200mA required (power supply sold separately). Uses standard 2.1mm plug.
• Audio attenuators in each audio direction if needed
• User-adjustable Microphone connection matrix to match nearly any radio microphone pinout
• Ultra fast auto-answer when activated. So fast that other phones may not even have time to ring.
• Shared line: will not answer phone line unless RTE has been activated by a rig control program. 

Operation: When activated by the RTE controller, the A2T will automatically answer a phone line when ringing voltage is detected. The unit will not answer when the RTE is idle and is thus compatible with other devices such as answering machines and faxes. The radio microphone is connected to the phone line via the audio interfaces upon a PTT line activation. With PTT idle, the radio speaker audio is connected. Automatically hangs up when the RTE returns to idle.

Clear, crisp, communications grade audio with reduced latency when using the wireline connection features. Use with a VoIP service such as SKYPE on the remote computer. No time limit connection fees can be less than $3.00/month or $25/year for unlimited calling. When using an ATA, SIP-to-SIP protocol calls are normally free from most providers and do not require a computer at the radio location. 

If you change radios, the microphone matrix is easy and intuitive. For example, if your mic audio is on pin 7 of your round mic connector, simply place a jumper in position 7 of the matrix row corresponding to mic audio. If it is on pin 1 of your modular connector, place a jumper in position 1 instead. 

The A2T may be added to your existing RTE controller regardless of age or revision #. 

You may download the A2T manual here:

 IMPORTANT NOTE ABOUT AUDIO RETURN: The RTE/FXO (and the enclosed A2T card) is set up to receive incoming calls from a remote location via wireline. It uses the phone line to send and receive audio. Why not VoIP?

•  Wireline all but eliminates the VoIP induced latency (also known as delay). High latency VoIP to VoIP connections may be measured in SECONDS. So called "low latency" connections may be 500mS or so. When timing and speed is of concern (e.g., contesting, DXing, etc.) even 500mS may seem like an eternity. 
• Internet Service Providers (ISPs) want to sell you their own VoIP telephone service. Some are already intercepting VoIP traffic that is not their own. This trend may expand in the future and connections using VoIP may not work in the future without paying extra monthly charges to the ISP.
  
• There are no echoes so echo cancellation algorithms are not necessary. Echo cancellation can sound a lot like VOX control cutting off first syllables of words. 
• VoIP systems add compression algorithms, noise blanking and other audio processing that cannot be controlled or turned off. Wireline connections maximize realism and minimize distortions important for small signal work. 
• Accessing your audio link via Skype adds some latency, but far less than half of a VoIP to VoIP connection. Skype employs professionals who know how to work around and with ISPs. Let them fight the battles for you.
• You are not "tethered" with a remote box to lug around. The remote box systems need a PHYSICAL Ethernet connection that you will not find in most hotel rooms, parks, or Starbucks shops. The RTE/FXO system is fully compatible with WIFI on the operating end. Operate your station from the patio via WIFI even at home. Can you do that with other systems?
  
• No expensive cables to cut and hack.
• If you don't have or don't want a wireline phone, it's easy to add an Internet-derived phone line that will work with the RTE/FXO. SIP to SIP calls are free and a system may be set up for as little as $30 with no monthly fees. No need to spend hundreds of dollars more. But remember that the RTE/FXO will not interfere with your normal telephone use since it WILL NOT ANSWER A CALL UNLESS YOU ARE USING YOUR RADIO. No need to have a "dedicated" line.