diff --git a/README.md b/README.md
index 2c7fd8f1..4af8b1f1 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,73 @@
-
[Try Restcomm Cloud NOW for FREE!](https://www.restcomm.com/sign-up/) Zero download and install required.
+=======
+Cloudhopper SMPP by Fizzed (forked from Twitter)
+================================================
+[](http://travis-ci.org/fizzed/cloudhopper-smpp)
-All Restcomm [docs](https://www.restcomm.com/docs/) and [downloads](https://www.restcomm.com/downloads/) are now available at [Restcomm.com](https://www.restcomm.com).
+Sponsored by
+------------
+Cloudhopper-SMPP is proudly sponsored by Greenback. We love the service and think you would too.
+
+
+More engineering. Less paperwork. Expenses made simple.
+
+Overview
+------------------------
+
+Efficient, scalable, rock-solid, and flexible Java implementation of the Short
+Messaging Peer to Peer Protocol (SMPP).
+
+Twitter exclusively relies on this library for its global SMS infrastructure.
+
+ * Real-world used library by Twitter across nearly every SMSC vendor and
+ mobile operator around the world. We've seen almost every variance in the
+ SMPP protocol and this library handles it flawlessly.
+ * Rigorous unit testing
+ * Support for SMPP protocol:
+ * Version 3.3
+ * Version 3.4
+ * Most of version 5.0
+ * Uses non-blocking (NIO) sockets (via underlying Netty dependency, one thread
+ can support 1 or more SMPP sessions)
+ * Can support thousands of binds/connections using minimal resources and threads
+ * Supports both client and server modes of the SMPP protocol (yes you can
+ write your own SMPP server using this library as well as be a client to one)
+ * Supports synchronous request mode (send request and block until response
+ received)
+ * Supports asynchronous request mode (send request, get a future response,
+ and then decide when you'd like to wait/get a response)
+ * Advanced support for SMPP "windowing":
+ * Configurable window size per session
+ * Waiting for a window slot to open up
+ * Get a list of unacknowledged/in-flight PDUs if session disconnects
+ * SSL/TLS support for clients and servers
+ * Configurable support for expiry of unacknowledged PDUs
+ * Configurable counter metrics per client-session, server-session, or server.
+ * Support for sniffing/logging/discarding of PDUs before normal processing
+
+The library has been tested and certified with hundreds of mobile operators
+and suppliers around the world. It's effective at being flexible with SMPP
+specifications that aren't truly compliant.
+
+Background and Contributors
+---------------------------
+
+This library was originally developed by Cloudhopper, Inc. in 2008. Cloudhopper
+was acquired by Twitter in April 2010. The main author of this library,
+Joe Lauer, left Twitter in April 2013 to found Fizzed, Inc. As of Nov 2015,
+[Fizzed, Inc](http://fizzed.com) is the official maintainer of the library.
+If you're looking for commercial support, please contact [Fizzed](http://fizzed.com).
+
+- Joe Lauer (Twitter: [@jjlauer](http://twitter.com/jjlauer))
+
+Installation
+------------
+
+Library is available via maven central. For netty-3 and a stable version:
-Cloudhopper SMPP by Fizzed (forked from Twitter)
-================================================
[](https://travis-ci.org/RestComm/cloudhopper-smpp)
diff --git a/src/main/java/com/cloudhopper/smpp/SmppConstants.java b/src/main/java/com/cloudhopper/smpp/SmppConstants.java
index d29502cd..6cca140f 100644
--- a/src/main/java/com/cloudhopper/smpp/SmppConstants.java
+++ b/src/main/java/com/cloudhopper/smpp/SmppConstants.java
@@ -124,6 +124,10 @@ public class SmppConstants {
public static final short TAG_DEST_SUBADDRESS = 0x0203;
public static final short TAG_CALLBACK_NUM = 0x0381;
public static final short TAG_MESSAGE_PAYLOAD = 0x0424;
+ public static final short TAG_IMSI = 0x057B;
+ public static final short TAG_NNN_DIGITS = 0x57C;
+ public static final short TAG_NNN_TON = 0x57D;
+ public static final short TAG_NNN_NPI = 0x57E;
// SC Interface Version
public static final short TAG_SC_INTERFACE_VERSION = 0x0210;
// Display Time
@@ -600,6 +604,10 @@ public class SmppConstants {
TAG_NAME_MAP.put(TAG_DEST_SUBADDRESS, "dest_subaddr");
TAG_NAME_MAP.put(TAG_CALLBACK_NUM, "callback_num");
TAG_NAME_MAP.put(TAG_MESSAGE_PAYLOAD, "message_payload");
+ TAG_NAME_MAP.put(TAG_IMSI, "imsi");
+ TAG_NAME_MAP.put(TAG_NNN_DIGITS, "nnn_digits");
+ TAG_NAME_MAP.put(TAG_NNN_TON, "nnn_ton");
+ TAG_NAME_MAP.put(TAG_NNN_NPI,"nnn_npi");
TAG_NAME_MAP.put(TAG_SC_INTERFACE_VERSION, "sc_interface_version");
TAG_NAME_MAP.put(TAG_DISPLAY_TIME, "display_time");
TAG_NAME_MAP.put(TAG_MS_VALIDITY, "ms_validity");