diff --git a/Manuals/Tcpi-ug/Connectivity.ent b/Manuals/Tcpi-ug/Connectivity.ent
new file mode 100644
index 0000000..5147fc1
--- /dev/null
+++ b/Manuals/Tcpi-ug/Connectivity.ent
@@ -0,0 +1,7 @@
+<!ENTITY connectivity                   SYSTEM "Connectivity.docbook">
+<!ENTITY connectivity-dialup            SYSTEM "Connectivity/Dialup.docbook">
+<!ENTITY connectivity-dialup-overview   SYSTEM "Connectivity/Dialup/overview.docbook">
+<!ENTITY connectivity-dialup-policy     SYSTEM "Connectivity/Dialup/policy.docbook">
+<!ENTITY connectivity-dialup-modem      SYSTEM "Connectivity/Dialup/modem.docbook">
+<!ENTITY connectivity-dialup-server     SYSTEM "Connectivity/Dialup/server.docbook">
+<!ENTITY connectivity-dialup-client     SYSTEM "Connectivity/Dialup/client.docbook">