diff --git a/doc/manuals/chapters/overview.adoc b/doc/manuals/chapters/overview.adoc
index 2798b2f..d39a4f6 100644
--- a/doc/manuals/chapters/overview.adoc
+++ b/doc/manuals/chapters/overview.adoc
@@ -50,6 +50,8 @@
   `osmo-remsim-bankd` instances
 * providing a RESTful JSON interface for external application logic to
 
+For more information, please see <<remsim-server>>.
+
 === osmo-remsim-client
 
 The `osmo-remsim-client` software is co-located next to the _user of the card_
@@ -77,6 +79,8 @@
 multiple phones/modems at one location, you can simply run multiple
 instances of `osmo-remsim-client` on the same system, one for each phone/modem.
 
+For more information, please see <<remsim-client>>.
+
 === osmo-remsim-bankd
 
 The `osmo-remsim-bankd` software is co-located next to a bank of SIM cards.
@@ -90,4 +94,28 @@
 * running a TCP server where TCP connections from `osmo-remsim-client`
   instances are accepted and handled.
 
+For more information, please see <<remsim-bankd>>.
 
+=== RSPRO
+
+RSPRO is the *R*emote *S*IM *PRO*tocol.  It is a binary protocol
+specified in ASN.1 which is spoken on any of the internal connections
+between `osmo-remsim-client`, `osmo-remsim-bankd` and
+`osmo-remsim-server`.
+
+You can find more information about RSPRO in <<rspro>>.
+
+=== RSRES
+
+RSRES is the *R*emote *S*IM *RES*T protocol.  It is an interface offered
+by `osmo-remsim-server` towards external back-end application logic of
+the operator of an osmo-remsim network.
+
+You can find more information about RSRES in <<rsres>>.
+
+=== Security
+
+WARNING: RSPRO, RSRES and their underlying transport layer both operate in plain-text,
+There is no authentication or encryption built into the protocol.  It is
+assumed that the protocols are only spoken over trusted, controlled IP
+networks, such as inside a VPN or a closed / private corporate network.
diff --git a/doc/manuals/chapters/remsim-bankd.adoc b/doc/manuals/chapters/remsim-bankd.adoc
index a3a1921..e76afd5 100644
--- a/doc/manuals/chapters/remsim-bankd.adoc
+++ b/doc/manuals/chapters/remsim-bankd.adoc
@@ -1,3 +1,4 @@
+[[remsim-bankd]]
 == osmo-remsim-bankd
 
 The `osmo-remsim-bankd` (SIM Bank Daemon) manages one given SIM bank.
diff --git a/doc/manuals/chapters/remsim-client.adoc b/doc/manuals/chapters/remsim-client.adoc
index e2c43d7..5e17ec0 100644
--- a/doc/manuals/chapters/remsim-client.adoc
+++ b/doc/manuals/chapters/remsim-client.adoc
@@ -1,3 +1,4 @@
+[[remism-client]]
 == osmo-remsim-client-st2
 
 The client interfaces with GSM phones / modems via dedicated "Card
diff --git a/doc/manuals/chapters/remsim-server.adoc b/doc/manuals/chapters/remsim-server.adoc
index 5215b54..304a7f3 100644
--- a/doc/manuals/chapters/remsim-server.adoc
+++ b/doc/manuals/chapters/remsim-server.adoc
@@ -1,3 +1,4 @@
+[[remsim-server]]
 == osmo-remsim-server
 
 === Running
@@ -18,6 +19,7 @@
 verbosity is not yet configurable.  However, as the libosmocore logging
 framework is used, extending this is an easy modification.
 
+[[rsres]]
 === RESTful/JSON Web API
 
 `osmo-remsim-server` provides a RESTful/JSON WEB API for application logic
diff --git a/doc/manuals/chapters/rspro.adoc b/doc/manuals/chapters/rspro.adoc
index ce39b9d..059182b 100644
--- a/doc/manuals/chapters/rspro.adoc
+++ b/doc/manuals/chapters/rspro.adoc
@@ -1,3 +1,4 @@
+[[rspro]]
 == RSPRO
 
 *RSPRO*, the *Remote SIM Protocol*, is an osmo-remsim specific,