diff --git a/Manuals/Tcpi-ug/Configurations.ent b/Manuals/Tcpi-ug/Configurations.ent
index 159b4ee..6c1229e 100755
--- a/Manuals/Tcpi-ug/Configurations.ent
+++ b/Manuals/Tcpi-ug/Configurations.ent
@@ -1,5 +1,8 @@
 <!ENTITY configurations                     SYSTEM "Configurations.docbook">
 <!ENTITY configurations-ppp                 SYSTEM "Configurations/Ppp.docbook">
 <!ENTITY configurations-ppp-intro           SYSTEM "Configurations/Ppp/intro.docbook">
+<!ENTITY configurations-ppp-packages        SYSTEM "Configurations/Ppp/packages.docbook">
 <!ENTITY configurations-ppp-modem-install   SYSTEM "Configurations/Ppp/modem-install.docbook">
 <!ENTITY configurations-ppp-modem-config    SYSTEM "Configurations/Ppp/modem-config.docbook">
+<!ENTITY configurations-ppp-modem-server    SYSTEM "Configurations/Ppp/modem-server.docbook">
+<!ENTITY configurations-ppp-modem-client    SYSTEM "Configurations/Ppp/modem-client.docbook">