diff --git a/doc/protocols_around_hnbgw.txt b/doc/protocols_around_hnbgw.txt
index 5af2623..3eef155 100644
--- a/doc/protocols_around_hnbgw.txt
+++ b/doc/protocols_around_hnbgw.txt
@@ -1,15 +1,22 @@
 Protocols Around the Home Node B Gateway
 ========================================
 
-        +------------+           +--------+          +----------+
- UE <-->| hNodeB     |<--Iuh---->| HNB-GW |<--IuCS-->| OsmoCSCN |
- UE <-->| femto cell |     ...-->|        |    ...-->|          |
-        |            |           |        |          +----------+
-        +------------+<--GTP-U   |        |
-                              \  |        |          +------+           +------+
-                              |  |        |<--IuPS-->| SGSN |<--GTP-C-->| GGSN |
-                              |  +--------+    ...-->|      |   GTP-U-->|      |
-                              |                      +------+  /        +------+
+                                 +--------+
+                             ,-->| Osmo   |
+                            /    | MGCPGW |
+                            |    |        |<--MGCP
+                            |    +--------+       \
+                            /                     |
+        +------------+<--RTP     +--------+       `->+----------+
+ UE <-->| hNodeB     |           | Osmo   |          | OsmoMSC  |        +------+
+ UE <-->| femto cell |<--Iuh---->| HNB-GW |<--IuCS-->|          |        | Osmo |
+        |            |           |        |          |     (VLR)|<-GSUP->| HLR  |
+        |            |           |        |          +----------+  GSUP->+------+
+        +------------+<--GTP-U   |        |                       /
+                              \  |        |          +------+<---'       +------+
+                              |  |        |<--IuPS-->| Osmo |<--GTP-C--->| Open |
+                              |  +--------+          | SGSN |   GTP-U--->| GGSN |
+                              |                      +------+  /         +------+
                               \_______________________________/
 
 
@@ -51,5 +58,3 @@
   +--------------------------+
 
 UE (User Endpoint) == MS (Mobile Subscriber) == mobile device
-CSCN (Circuit Switched Core Network) == OsmoNITB without BSC
-