diff --git a/src/oned/telepen_common.rs b/src/oned/telepen_common.rs
index bd5ac4a..79c5541 100644
--- a/src/oned/telepen_common.rs
+++ b/src/oned/telepen_common.rs
@@ -26,10 +26,10 @@ pub mod TelepenCommon {
             let temp = contents.chars().nth(i).unwrap() as u32;
 
             if temp >= 27 {
-                number.push_str(&(temp - 27).to_string());
+                number.push_str(&format!("{:0>2}", (temp - 27)));
             }
             else {
-                number.push_str(&(temp - 17).to_string());
+                number.push_str(&format!("{:0>2}", (temp - 17)));
             }
         }
         
diff --git a/test_resources/blackbox/telepen-2/02.png b/test_resources/blackbox/telepen-2/02.png
new file mode 100644
index 0000000..7cadeba
Binary files /dev/null and b/test_resources/blackbox/telepen-2/02.png differ
diff --git a/test_resources/blackbox/telepen-2/02.txt b/test_resources/blackbox/telepen-2/02.txt
new file mode 100644
index 0000000..8070467
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/02.txt
@@ -0,0 +1 @@
+11058474
\ No newline at end of file
diff --git a/test_resources/blackbox/telepen-2/03.png b/test_resources/blackbox/telepen-2/03.png
new file mode 100644
index 0000000..43c12d3
Binary files /dev/null and b/test_resources/blackbox/telepen-2/03.png differ
diff --git a/test_resources/blackbox/telepen-2/03.txt b/test_resources/blackbox/telepen-2/03.txt
new file mode 100644
index 0000000..592f76f
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/03.txt
@@ -0,0 +1 @@
+10398404
\ No newline at end of file
diff --git a/test_resources/blackbox/telepen-2/04.png b/test_resources/blackbox/telepen-2/04.png
new file mode 100644
index 0000000..1d1c385
Binary files /dev/null and b/test_resources/blackbox/telepen-2/04.png differ
diff --git a/test_resources/blackbox/telepen-2/04.txt b/test_resources/blackbox/telepen-2/04.txt
new file mode 100644
index 0000000..3a69469
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/04.txt
@@ -0,0 +1 @@
+10483931
\ No newline at end of file
diff --git a/test_resources/blackbox/telepen-2/05.png b/test_resources/blackbox/telepen-2/05.png
new file mode 100644
index 0000000..770815e
Binary files /dev/null and b/test_resources/blackbox/telepen-2/05.png differ
diff --git a/test_resources/blackbox/telepen-2/05.txt b/test_resources/blackbox/telepen-2/05.txt
new file mode 100644
index 0000000..c03f14f
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/05.txt
@@ -0,0 +1 @@
+11193263
\ No newline at end of file
diff --git a/test_resources/blackbox/telepen-2/06.png b/test_resources/blackbox/telepen-2/06.png
new file mode 100644
index 0000000..508a1e3
Binary files /dev/null and b/test_resources/blackbox/telepen-2/06.png differ
diff --git a/test_resources/blackbox/telepen-2/06.txt b/test_resources/blackbox/telepen-2/06.txt
new file mode 100644
index 0000000..db65f54
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/06.txt
@@ -0,0 +1 @@
+11264314
\ No newline at end of file
diff --git a/test_resources/blackbox/telepen-2/07.png b/test_resources/blackbox/telepen-2/07.png
new file mode 100644
index 0000000..58a3b17
Binary files /dev/null and b/test_resources/blackbox/telepen-2/07.png differ
diff --git a/test_resources/blackbox/telepen-2/07.txt b/test_resources/blackbox/telepen-2/07.txt
new file mode 100644
index 0000000..e55cdad
--- /dev/null
+++ b/test_resources/blackbox/telepen-2/07.txt
@@ -0,0 +1 @@
+11188986
\ No newline at end of file
diff --git a/tests/telepen_blackbox_1_test_case.rs b/tests/telepen_blackbox_1_test_case.rs
index 6591b94..1866f38 100644
--- a/tests/telepen_blackbox_1_test_case.rs
+++ b/tests/telepen_blackbox_1_test_case.rs
@@ -45,7 +45,7 @@ fn telepen_numeric_test_case() {
         BarcodeFormat::TELEPEN,
     );
 
-    tester.add_test_complex(1, 1, 0, 0, 0.0);
+    tester.add_test_complex(7, 1, 0, 0, 0.0);
     tester.add_hint(rxing::DecodeHintType::TELEPEN_AS_NUMERIC, rxing::DecodeHintValue::TelepenAsNumeric(true));
     tester.ignore_pure = true;
 
@@ -68,14 +68,22 @@ fn telepen_checksum_test2() {
 
 #[test]
 fn telepen_alpha_to_numeric_test() {
-    let ascii = "'=Siu";
-    let result = TelepenCommon::ascii_to_numeric(ascii);
+    let mut ascii = "'=Siu";
+    let mut result = TelepenCommon::ascii_to_numeric(ascii);
     assert_eq!("1234567890", result);
+
+    ascii = "& oe";
+    result = TelepenCommon::ascii_to_numeric(ascii);
+    assert_eq!("11058474", result);
 }
 
 #[test]
 fn telepen_numeric_to_ascii_test() {
-    let numeric = "1234567890";
-    let result = TelepenCommon::numeric_to_ascii(numeric).unwrap();
+    let mut numeric = "1234567890";
+    let mut result = TelepenCommon::numeric_to_ascii(numeric).unwrap();
     assert_eq!("'=Siu", result);
-}
\ No newline at end of file
+
+    numeric = "11058474";
+    result = TelepenCommon::numeric_to_ascii(numeric).unwrap();
+    assert_eq!("& oe", result);
+}