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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Chapter17 Telephone Systems"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Example 17.1.1,Pg.no.641"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "a)The max gain is 44.0 dB\n",
+      "b)The max gain is 30 dB\n",
+      "c)The amplr gain is 27.0 dB\n"
+     ]
+    }
+   ],
+   "source": [
+    "import math\n",
+    "FTL=50\n",
+    "M=12\n",
+    "NFL=2*FTL\n",
+    "NFLG=(NFL-M)\n",
+    "G_max1=NFLG/2\n",
+    "G_max1=round(G_max1,1)\n",
+    "print 'a)The max gain is',G_max1,'dB' \n",
+    "#b) Determination of max gain2 \n",
+    "IL=3\n",
+    "RLW=20\n",
+    "RLE=40\n",
+    "NL=(4*IL)+RLW+RLE\n",
+    "NLG=(NL-M)\n",
+    "G_max2=NLG/2\n",
+    "print 'b)The max gain is',G_max2,'dB' \n",
+    "#c ) Determination of amplr gain\n",
+    "LT=15.0\n",
+    "OM=6.0\n",
+    "OLW=(RLW-LT)/2\n",
+    "OLE=(RLE-LT)/2\n",
+    "A=OM+OLW+OLE+(2*IL)\n",
+    "print 'c)The amplr gain is',A,'dB'"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}