diff --git a/doc/gb_stack_fr.dot b/doc/gb_stack_fr.dot
new file mode 100644
index 0000000..f69a264
--- /dev/null
+++ b/doc/gb_stack_fr.dot
@@ -0,0 +1,48 @@
+digraph G {
+	rankdir = LR;
+	label = "Gb protocol stack with NS over FR";
+
+	"BSSGP_BVC_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_BVC_CT | <BSSGP_SP> BSSGP_SP | <BSSGP_SP_SIG> BSSGP_SP_SIG | <BSSGP_PROC> BSSGP_PROC | <GLOBAL> GLOBAL | <MGMT> MGMT | <BVC> BVC"
+	]
+
+	"BSSGP_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_CT | <PROC> PROC | <GLOBAL> GLOBAL | <RIM> RIM | <MGMT> MGMT | <BVC> BVC | <BSCP> BSCP"
+	]
+
+	"NS_CT" [
+		shape = "record"
+		label = "<f0> NS_CT | <NS_SP> NS_SP | <NSVC> NSVC | <NS_CTRL> NS_CTRL | <NSIP_PROC> NSIP_PROC"
+	]
+
+	"NSVC_CT" [
+		shape = "record"
+		label = "<f0> NSVC_CT | <NS_SP> NS_SP | <NSCP> NSCP"
+	]
+
+	"NS_Provider_FR_CT" [
+		shape = "record"
+		label = "<f0> NS_PRovider_FR_CT | <NSE> NSE | <FR> FR | <FR_PROC> FR_PROC"
+	]
+
+	"FR_Emulation_CT" [
+		shape = "record"
+		label = "<f0> FR_Emulation_CT | <CLIENT> CLIENT | <PROC> PROC | <FR> FR"
+	]
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <FR> FR"
+	]
+
+	"BSSGP_BVC_CT":BVC -> "BSSGP_CT":BVC
+	"BSSGP_CT":BSCP -> "NS_CT":NS_SP
+
+	"NS_CT":NSVC -> "NSVC_CT":NS_SP
+	"NSVC_CT":NSCP -> "NS_Provider_FR_CT":NSE
+	"NS_Provider_FR_CT":FR ->  "FR_Emulation_CT":CLIENT
+	"NS_Provider_FR_CT":FR_PROC ->  "FR_Emulation_CT":PROC
+	"FR_Emulation_CT":FR -> "system":FR
+}
diff --git a/doc/gb_stack_ip.dot b/doc/gb_stack_ip.dot
new file mode 100644
index 0000000..0c54c78
--- /dev/null
+++ b/doc/gb_stack_ip.dot
@@ -0,0 +1,43 @@
+digraph G {
+	rankdir = LR;
+	label = "Gb protocol stack with NS over IP";
+
+	"BSSGP_BVC_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_BVC_CT | <BSSGP_SP> BSSGP_SP | <BSSGP_SP_SIG> BSSGP_SP_SIG | <BSSGP_PROC> BSSGP_PROC | <GLOBAL> GLOBAL | <MGMT> MGMT | <BVC> BVC"
+	]
+
+	"BSSGP_CT" [
+		shape = "record"
+		label = "<f0> BSSGP_CT | <PROC> PROC | <GLOBAL> GLOBAL | <RIM> RIM | <MGMT> MGMT | <BVC> BVC | <BSCP> BSCP"
+	]
+
+	"NS_CT" [
+		shape = "record"
+		label = "<f0> NS_CT | <NS_SP> NS_SP | <NSVC> NSVC | <NS_CTRL> NS_CTRL | <NSIP_PROC> NSIP_PROC"
+	]
+
+	"NSVC_CT" [
+		shape = "record"
+		label = "<f0> NSVC_CT | <NS_SP> NS_SP | <NSCP> NSCP"
+	]
+
+	"NS_Provider_IPL4_CT" [
+		shape = "record"
+		label = "<f0> NS_Provider_IPL4_CT | <NSE> NSE | <NSVC> NSVC | <IPL4> IPL4 | <PROC> PROC"
+	]
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <IPL4> IPL4"
+	]
+
+	"BSSGP_BVC_CT":BVC -> "BSSGP_CT":BVC
+	"BSSGP_CT":BSCP -> "NS_CT":NS_SP
+
+	"NS_CT":NSVC -> "NSVC_CT":NS_SP
+	"NS_CT":NSIP_PROC -> "NS_Provider_IPL4_CT":PROC
+	"NSVC_CT":NSCP -> "NS_Provider_IPL4_CT":NSVC
+	"NS_Provider_IPL4_CT":IPL4 -> "system":IPL4
+
+}
diff --git a/doc/ran_emulation_aoip.dot b/doc/ran_emulation_aoip.dot
new file mode 100644
index 0000000..59f6d3d
--- /dev/null
+++ b/doc/ran_emulation_aoip.dot
@@ -0,0 +1,39 @@
+digraph G {
+	rankdir = LR;
+	label = "RAN_Emulation when used with AoIP as in MSC_Tests";
+
+	"RAN_ConnHdlr" [
+		shape = "record"
+		label = "<f0> RAN_ConnHdlr | <BSSAP> BSSAP | <BSSAP_PROC> BSSAP_PROC"
+	];
+
+	"RAN_Emulation_CT" [
+		shape = "record"
+		label = "<f0> RAN_Emulation_CT | <BSSAP> BSSAP | <RANAP> RANAP | <MGCP> MGCP | <CTRL> CTRL | <CTRL_CLIENT> CTRL_CLIENT | <CLIENT> CLIENT | <PROC> PROC"
+	];
+
+	"SCCP_CT" [
+		shape = "record"
+		label = "<f0> SCCP_CT | <MTP3_SCCP_PORT> MTP3_SCCP_PORT | <SCCP_SP_PORT> SCCP_SP_PORT"
+	];
+
+	"M3UA_CT" [
+
+		shape = "record"
+		label = "<f0> M3UA_CT | <STCP_PORT> SCTP_PORT | <MTP3_SP_PORT> MTP3_SP_PORT"
+	];
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <SCTP> SCTP"
+	];
+
+	"RAN_ConnHdlr":BSSAP -> "RAN_Emulation_CT":CLIENT
+	"RAN_ConnHdlr":BSSAP_PROC -> "RAN_Emulation_CT":PROC
+
+	"RAN_Emulation_CT":BSSAP -> "SCCP_CT":SCCP_SP_PORT
+	"RAN_Emulation_CT":RANAP -> "SCCP_CT":SCCP_SP_PORT
+
+	"SCCP_CT":MTP3_SCCP_PORT -> "M3UA_CT":MTP3_SP_PORT
+	"M3UA_CT":SCTP_PORT -> "system":SCTP
+}
diff --git a/doc/ran_emulation_sccplite.dot b/doc/ran_emulation_sccplite.dot
new file mode 100644
index 0000000..cce29b1
--- /dev/null
+++ b/doc/ran_emulation_sccplite.dot
@@ -0,0 +1,39 @@
+digraph G {
+	rankdir = LR;
+	label = "RAN_Emulation when used with SCCPLite";
+
+	"RAN_ConnHdlr" [
+		shape = "record"
+		label = "<f0> RAN_ConnHdlr | <BSSAP> BSSAP | <BSSAP_PROC> BSSAP_PROC"
+	];
+
+	"RAN_Emulation_CT" [
+		shape = "record"
+		label = "<f0> RAN_Emulation_CT | <BSSAP> BSSAP | <RANAP> RANAP | <MGCP> MGCP | <CTRL> CTRL | <CTRL_CLIENT> CTRL_CLIENT | <CLIENT> CLIENT | <PROC> PROC"
+	];
+
+	"SCCP_CT" [
+		shape = "record"
+		label = "<f0> SCCP_CT | <MTP3_SCCP_PORT> MTP3_SCCP_PORT | <SCCP_SP_PORT> SCCP_SP_PORT"
+	];
+
+	"IPA_Emulation_CT" [
+		shape = "record"
+		label = "<f0> IPA_Emulation_CT | <MTP3_SP_PORT> MTP3_SP_PORT | <IPA_MGCP_PORT> IPA_MGCP_PORT | <IPA_RSL_PORT> IPA_RSL_PORT | <IPA_OML_PORT> IPA_OML_PORT | <IPA_CTRL_PORT> IPA_CTRL_PORT | <IPA_GSUP_PORT> IPA_GSUP_PORT | <IPA_RSPRO_PORT> IPA_RSPRO_PORT | <IPA_OSMO_PCU_PORT> IPA_OSMO_PCU_PORT | <IPA_SP_PORT> IPA_SP_PORT | <IPA_PORT> IPA_PORT"
+	];
+
+	"system" [
+		shape = "record"
+		label = "<f0> system | <IPA_CODEC_PORT> IPA_CODEC_PORT"
+	];
+
+	"RAN_ConnHdlr":BSSAP -> "RAN_Emulation_CT":CLIENT
+	"RAN_ConnHdlr":BSSAP_PROC -> "RAN_Emulation_CT":PROC
+
+	"RAN_Emulation_CT":BSSAP -> "SCCP_CT":SCCP_SP_PORT
+	"RAN_Emulation_CT":MGCP -> "IPA_Emulation_CT":IPA_MGCP_PORT
+	"RAN_Emulation_CT":CTRL -> "IPA_Emulation_CT":IPA_CTRL_PORT
+
+	"SCCP_CT":MTP3_SCCP_PORT -> "IPA_Emulation_CT":MTP3_SP_PORT
+	"IPA_Emulation_CT":IPA_PORT -> "system":IPA_CODEC_PORT
+}