diff --git a/doc/hamnet70.adoc b/doc/hamnet70.adoc
index 64fb67d..23631c4 100644
--- a/doc/hamnet70.adoc
+++ b/doc/hamnet70.adoc
@@ -267,108 +267,109 @@ To be defined:
 
 ==== Connection Establishment
 
-[mermaid,format=svg,svg-type=interactive]
+[msc,format=svg,svg-type=interactive, scale=1.4]
 .Connection establishment
 ....
-sequenceDiagram
-	participant digi as Digipeater
-	participant client as Client
+msc {
+	digi [label="Digipeater"],
+	client [label="Client"];
 
-	digi -->> client: Beacon (Broadcast)
-	digi -->> client: Beacon (Broadcast)
-	digi -->> client: Beacon (Broadcast)
+	digi -> client [label="Beacon (Broadcast)"];
+	digi -> client [label="Beacon (Broadcast)"];
 
-	Note over client: Decides to connect
+	client box client [label="Decides to connect"];
+	...;
 
-	client ->> digi: Connection Request
+	digi -> client [label="Beacon (Broadcast)"];
+	digi <- client [label="Connection Request"];
 
-	alt Connection accepted
-		digi ->> client: Connection Parameters
-		client ->> digi: Connection Acknowledgement
-		Note over digi,client: Connection established
-	else Connection rejected
-		digi ->> client: Connection Refusal
-	end
+	--- [label="Alternative 1: Connection is accepted"];
+	digi -> client [label="Connection Parameters"];
+	digi <- client [label="Connection Acknowledgement"];
+	digi box client [label="Connection established"];
+
+	--- [label="Alternative 2: Connection is rejected"];
+	digi -> client [label="Connection Refusal"];
+}
 ....
 
 ==== Communication during a Connection
 
-[mermaid,format=svg,svg-type=interactive]
+[msc,format=svg,svg-type=interactive, scale=1.4]
 .In-connection communication
 ....
-sequenceDiagram
-	participant digi as Digipeater
-	participant client as Client
+msc {
+	digi [label="Digipeater"],
+	client [label="Client"];
 
-	Note over digi,client: Connection established
+	--- [label="Connection established"];
+	digi => client [label="Up to 14 packets without Transmission Request"];
+	digi -> client [label="Packet with Transmission Request"];
 
-	loop For up to 14 packets
-		digi ->> client: Packet without Transmission Request
-	end
+	digi box digi [label="Start timeout timer"];
 
-	digi ->> client: Packet with Transmission Request
+	--- [label="Alternative 1: Normal reply"];
 
-	Note over digi: Start timeout timer
+	digi <= client [label="Up to 14 packets without Transmission Request"];
+	digi <- client [label="Packet with Transmission Request"];
 
-	alt Normal reply
-		loop For up to 14 packets
-			client ->> digi: Packet without Transmission Request
-		end
+	--- [label="Alternative 2: Partial reply"];
 
-		client ->> digi: Packet with Transmission Request
-	else Partial reply
-		loop For up to 14 packets
-			client ->> digi: Packet without Transmission Request
-		end
+	digi <= client [label="Up to 14 packets without Transmission Request"];
+	digi x- client [label="Packet with Transmission Request"];
+	...;
+	digi rbox digi [label="Timeout expired"];
 
-		client --x digi: Packet with Transmission Request (lost)
+	--- [label="Alternative 3: No reply"];
 
-		Note over digi: Timeout expired
-	else No reply
-		Note over digi: Timeout expired
-	end
+	digi x- client [label="Packets from client"];
+	...;
+	digi rbox digi [label="Timeout expired"];
 
-	Note over digi: Query next client
+	--- [label="Finally"];
+
+	digi box digi [label="Query next client"];
+}
 ....
 
 ==== Connection Shutdown
 
 ===== Client-initiated
 
-[mermaid,format=svg,svg-type=interactive]
+[msc,format=svg,svg-type=interactive, scale=1.4]
 .Client-initiated shutdown
 ....
-sequenceDiagram
-	participant digi as Digipeater
-	participant client as Client
+msc {
+	digi [label="Digipeater"],
+	client [label="Client"];
 
-	Note over digi,client: Connection established
+	--- [label="Connection established"];
+	client box client [label="Decides to disconnect"];
+	...;
+	digi -> client [label="Transmission request"];
+	digi <- client [label="Disconnect"];
 
-	Note over client: Decides to disconnect
-
-	digi ->> client: Transmission Request
-	client ->> digi: Disconnect
-
-	Note over digi,client: Connection closed
+	--- [label="Connection closed"];
+}
 ....
 
 ===== Digipeater-initiated
 
-[mermaid,format=svg,svg-type=interactive]
+[msc,format=svg,svg-type=interactive, scale=1.4]
 .Digipeater-initiated shutdown
 ....
-sequenceDiagram
-	participant digi as Digipeater
-	participant client as Client
+msc {
+	digi [label="Digipeater"],
+	client [label="Client"];
 
-	Note over digi,client: Connection established
+	--- [label="Connection established"];
+	digi box digi [label="Decides to disconnect Client"];
 
-	Note over digi: Decides to disconnect client
+	digi -> client [label="Disconnect request"];
+	digi <- client [label="Disconnect"];
 
-	digi ->> client: Disconnect Request
-	client ->> digi: Disconnect
-
-	Note over digi,client: Connection closed
+	--- [label="Connection closed"];
+}
 ....
 
 == Higher Layer Protocols