Added my solutions

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" output="target/classes" path="src/main/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
+		<attributes>
+			<attribute name="optional" value="true"/>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="output" path="target/classes"/>
+</classpath>

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>TelemetrySystem</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+	</natures>
+</projectDescription>

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.source=1.5

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/.settings/org.eclipse.m2e.core.prefs

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+activeProfiles=
+eclipse.preferences.version=1
+resolveWorkspaceProjects=true
+version=1

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>TelemetrySystem</groupId>
+  <artifactId>TelemetrySystem</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <dependencies>
+  <dependency>
+  		<groupId>junit</groupId>
+  		<artifactId>junit</artifactId>
+  		<version>4.9</version>
+  		<type>jar</type>
+  		<scope>test</scope>
+  	</dependency>
+  </dependencies>
+</project>

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/src/main/java/tddmicroexercises/telemetrysystem/ITelemetryClient.java

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+package tddmicroexercises.telemetrysystem;
+
+public interface ITelemetryClient {
+
+	public static final String DIAGNOSTIC_MESSAGE = "AT#UD";
+
+	boolean getOnlineStatus();
+
+	void connect(String telemetryServerConnectionString);
+
+	void disconnect();
+
+	void send(String message);
+
+	String receive();
+
+}

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/src/main/java/tddmicroexercises/telemetrysystem/TelemetryClient.java

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+package tddmicroexercises.telemetrysystem;
+
+import java.util.Random;
+
+public class TelemetryClient implements ITelemetryClient
+{
+    //
+    // The communication with the server is simulated in this implementation.
+    // Because the focus of the exercise is on the other class.
+    //
+
+	private boolean onlineStatus;
+    private boolean diagnosticMessageJustSent = false;
+
+    private final Random connectionEventsSimulator = new Random();
+    private final Random randomMessageSimulator = new Random();
+
+	public boolean getOnlineStatus()
+	{
+		return onlineStatus; 
+	}
+
+	public void connect(String telemetryServerConnectionString)
+	{
+		if (telemetryServerConnectionString == null || "".equals(telemetryServerConnectionString))
+		{
+			throw new IllegalArgumentException();
+		}
+
+        // Fake the connection with 20% chances of success
+		boolean success = connectionEventsSimulator.nextInt(10) <= 2;
+
+		onlineStatus = success;
+	}
+
+	public void disconnect()
+	{
+		onlineStatus = false;
+	}
+
+	public void send(String message)
+	{
+		if (message == null || "".equals(message))
+		{
+			throw new IllegalArgumentException();
+		}
+
+        // The simulation of Send() actually just remember if the last message sent was a diagnostic message.
+        // This information will be used to simulate the Receive(). Indeed there is no real server listening.
+        if (message == DIAGNOSTIC_MESSAGE)
+        {
+            diagnosticMessageJustSent = true;
+        }
+        else
+        {
+            diagnosticMessageJustSent = false;
+        }
+    }
+
+	public String receive()
+	{
+		String message;
+
+        if (diagnosticMessageJustSent)
+        {
+            // Simulate the reception of the diagnostic message
+            message = "LAST TX rate................ 100 MBPS\r\n"
+                    + "HIGHEST TX rate............. 100 MBPS\r\n"
+                    + "LAST RX rate................ 100 MBPS\r\n"
+                    + "HIGHEST RX rate............. 100 MBPS\r\n"
+                    + "BIT RATE.................... 100000000\r\n"
+                    + "WORD LEN.................... 16\r\n"
+                    + "WORD/FRAME.................. 511\r\n"
+                    + "BITS/FRAME.................. 8192\r\n"
+                    + "MODULATION TYPE............. PCM/FM\r\n"
+                    + "TX Digital Los.............. 0.75\r\n"
+                    + "RX Digital Los.............. 0.10\r\n"
+                    + "BEP Test.................... -5\r\n"
+                    + "Local Rtrn Count............ 00\r\n"
+                    + "Remote Rtrn Count........... 00";
+
+            diagnosticMessageJustSent = false;
+        }
+        else
+        {
+            // Simulate the reception of a response message returning a random message.
+            message = "";
+            int messageLength = randomMessageSimulator.nextInt(50) + 60;
+            for(int i = messageLength; i > 0; --i)
+            {
+                message += (char)randomMessageSimulator.nextInt(40) + 86;
+            }
+        }
+
+		return message;
+	}
+}
+

TDDMicroExercises.YoursSolutions/Java-viswans/TelemetrySystem/src/main/java/tddmicroexercises/telemetrysystem/TelemetryDiagnosticControls.java

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+package tddmicroexercises.telemetrysystem;
+
+public class TelemetryDiagnosticControls
+{
+    private final static String DIAGNOSTIC_CHANNEL_CONNECTION_STRING = "*111#";
+
+    private final ITelemetryClient telemetryClient;
+    private String diagnosticInfo = "";
+
+    public TelemetryDiagnosticControls()
+    {
+        telemetryClient = new TelemetryClient();
+    }
+
+    public TelemetryDiagnosticControls(ITelemetryClient telemetryClient) {
+    	this.telemetryClient = telemetryClient;
+    }
+
+    public String getDiagnosticInfo()
+    {
+        return diagnosticInfo;
+    }
+
+    public void setDiagnosticInfo(String diagnosticInfo)
+    {
+        this.diagnosticInfo = diagnosticInfo;
+    }
+
+    public void checkTransmission() throws Exception
+    {
+        diagnosticInfo = "";
+
+        telemetryClient.disconnect();
+
+        int retryLeft = 3;
+        while (telemetryClient.getOnlineStatus() == false && retryLeft > 0)
+        {
+            telemetryClient.connect(DIAGNOSTIC_CHANNEL_CONNECTION_STRING);
+            retryLeft -= 1;
+        }
+
+        if(telemetryClient.getOnlineStatus() == false)
+        {
+            throw new Exception("Unable to connect.");
+        }
+
+        telemetryClient.send(TelemetryClient.DIAGNOSTIC_MESSAGE);
+        diagnosticInfo = telemetryClient.receive();
+    }
+}