diff -ruN kozos15/telnetd.c kozos16/telnetd.c
--- kozos15/telnetd.c	Mon Nov 12 23:01:07 2007
+++ kozos16/telnetd.c	Mon Nov 12 23:09:28 2007
@@ -15,6 +15,16 @@
 int telnetd_id;
 int telnetd_dummy;
 
+static int dummy_func(int n)
+{
+  int i, sum;
+  sum = 0;
+  for (i = 1; i < n; i++) {
+    sum += i;
+  }
+  return sum;
+}
+
 static int command_main(int s, char *argv[])
 {
   char *p;
@@ -42,6 +52,8 @@
 
     if (!strncmp(buffer, "echo", 4)) {
       write(s, buffer + 4, strlen(buffer + 4));
+    } else if (!strncmp(buffer, "call", 4)) {
+      dummy_func(10);
     } else if (!strncmp(buffer, "down", 4)) {
       int *nullp = NULL;
       *nullp = 1;