Audio interface
An audio interface includes interface circuitry configured to translate audio signals received from a military handset to audio signals compatible with a plain old telephone system (POTS) network. The interface circuitry presents a 6-pin (or 5-pin) audio port configured to couple the military handset to the interface circuitry. The interface circuitry further features a 2-wire POTS connector configured to couple the interface circuitry to the POTS network.
1. An audio interface comprising:
interface circuitry configured to translate audio signals received from a military handset to audio signals compatible with a plain old telephone service (POTS) network, the interface circuitry having an input and an output;
a multi-pin audio port coupled to the input and configured to couple the military handset to the interface circuitry; and
a 2-wire POTS connector coupled to the output and configured to couple the interface circuitry to the POTS network,
wherein the interface circuitry comprises
tone circuitry configured to add a POTS network dial tone to the audio signals,
first buffer circuitry configured to provide impedance matching between the military handset and the tone circuitry,
a phone line interface (PLI) circuitry configured to convert a format of the audio signals between a military handset format and a POTS network format, wherein the converting comprises conditioning and isolating the audio signals,
volume circuitry configured to provide volume control for the audio signals, and
second buffer circuitry configured to provide impedance matching between the volume circuitry and the military handset.
2. The audio interface of claim 1 , wherein the audio port comprises a 6-pin U-229 or a 5-pin U-183 connector.
3. The audio interface of claim 1 , wherein the 2-wire POTS connector includes a surface mount connector when the audio interface is coupled to the POTS network through a high speed modem.
4. The audio interface of claim 1 , wherein the 2-wire POTS connector comprises a RJ-11 connector when the audio interface is coupled to the POTS network through a landline.
5. A telecommunications system comprising:
a telecommunications terminal having connectivity both to a satellite network and a plain old telephone service (POTS) network, the telecommunications terminal comprising:
an audio interface comprising:
interface circuitry configured to translate audio signals received from a military handset to audio signals compatible with the POTS network, the interface circuitry having an input and an output,
a multi-pin audio port coupled to the input and configured to couple the military handset to the interface circuitry, and
a 2-wire POTS connector coupled to the output and configured to couple the interface circuitry to the POTS network,
wherein the interface circuitry comprises
tone circuitry configured to add a POTS network dial tone to the audio signals,
first buffer circuitry configured to provide impedance matching between the military handset and the tone circuitry,
a phone line interface (PLI) circuitry configured to convert a format of the audio signals between a military handset format and a POTS network format, wherein the converting comprises conditioning and isolating the audio signals,
volume circuitry configured to provide volume control for the audio signals, and
second buffer circuitry configured to provide impedance matching between the volume circuitry and the military handset.
6. The audio interface of claim 5 , wherein the audio port comprises a 6-pin U-229 or a 5-pin U-183 connector.
7. The audio interface of claim 5 , wherein the 2-wire POTS connector includes a surface mount connector when the audio interface is coupled to the POTS network through a high speed modem.
8. The audio interface of claim 5 , wherein the 2-wire POTS connector comprises a RJ-11 connector when the audio interface is coupled to the POTS network through a landline.
9. A method comprising:
receiving audio signals from a military handset;
preparing the received audio signals for transmission through a POTS network, wherein the preparing comprises
adding a POTS network dial tone to the audio signals,
providing impedance matching between the military handset and the tone circuitry,
converting a format of the audio signals between a military handset format and a POTS network format, wherein the converting comprises conditioning and isolating the audio signals,
providing volume control for the audio signals, and
providing impedance matching between the volume circuitry and the military handset; and
outputting the prepared audio signals to the POTS network.
10. The method of claim 9 , wherein the receiving audio signals occurs via a multi-pin audio port.
11. The method of claim 9 , wherein outputting the prepared audio signals occurs via a 2-wire POTS connector.