diff --git a/asterisk/conf/mobile/pjsip.conf b/asterisk/conf/mobile/pjsip.conf
index 9500b01..a000c93 100644
--- a/asterisk/conf/mobile/pjsip.conf
+++ b/asterisk/conf/mobile/pjsip.conf
@@ -11,9 +11,9 @@ type = global
 endpoint_identifier_order = ip,username,anonymous
 
 ; Basic UDP Transport.
-[ipv4-udp]
+[ipv4-udp-nat]
 type = transport
-bind = 0.0.0.0:65535
+bind = 0.0.0.0:65534
 protocol = udp
 local_net = 172.16.0.0/12
 local_net = 192.168.0.0/16
diff --git a/asterisk/conf/mobile/pjsip_users.conf b/asterisk/conf/mobile/pjsip_users.conf
new file mode 100644
index 0000000..abfba9c
--- /dev/null
+++ b/asterisk/conf/mobile/pjsip_users.conf
@@ -0,0 +1,12 @@
+;
+; /etc/asterisk/pjsip_users.conf
+;
+[1000](ext-defaults)
+
+; Yay templates; we generally only need to provide an inbound user/pass
+; and a caller id.
+inbound_auth/username=1000
+
+inbound_auth/password=MapleCarrotBlueGrainFishSoapSoup
+
+endpoint/callerid=1000 <Ext 1000>
diff --git a/asterisk/conf/mobile/pjsip_wizard.conf b/asterisk/conf/mobile/pjsip_wizard.conf
new file mode 100644
index 0000000..0493ec9
--- /dev/null
+++ b/asterisk/conf/mobile/pjsip_wizard.conf
@@ -0,0 +1,39 @@
+;
+; /etc/asterisk/pjsip_wizard.conf
+;
+[ext-defaults](!)
+type=wizard
+
+; Users must register and auth!
+accepts_registrations=yes
+accepts_auth=yes
+
+; Check ext connectivity every x seconds.
+aor/qualify_frequency=30
+
+; How long do we wait for a response to our connection check?
+aor/qualify_timeout=3.0
+
+; Remove older sessions when logins exceed max_contacts.
+aor/remove_existing=yes
+
+; Max simultaneous account logins.
+endpoint/max_contacts=1
+
+; Default context.
+endpoint/context=from-ext
+
+; Audio codecs: alaw only please.
+endpoint/allow=!all,alaw
+
+; Default language.
+endpoint/language=en_GB
+
+; By default don't allow direct media connections.
+endpoint/direct_media=no
+
+; Busy Lamp field / Presence context.
+endpoint/subscribe_context=presence
+
+; Load users.
+#tryinclude pjsip_users.conf
diff --git a/asterisk/conf/mobile/res_stun_monitor.conf b/asterisk/conf/mobile/res_stun_monitor.conf
new file mode 100644
index 0000000..1a13ac7
--- /dev/null
+++ b/asterisk/conf/mobile/res_stun_monitor.conf
@@ -0,0 +1,9 @@
+;
+; /etc/asterisk/rtp.conf
+;
+; This really isn't needed unless you're behind NAT.
+;
+[general]
+
+stunaddr=stun.aa.net.uk:3478
+stunrefresh=30
diff --git a/asterisk/conf/mobile/rtp.conf b/asterisk/conf/mobile/rtp.conf
index d5ebdae..aed55be 100644
--- a/asterisk/conf/mobile/rtp.conf
+++ b/asterisk/conf/mobile/rtp.conf
@@ -5,4 +5,4 @@
 ;
 [general]
 rtpstart=62535
-rtpend=65534
+rtpend=65533