Thanks Brian, sorry should have pre-empted that one as I've issue before. start_dtmf is in the dialplan and occurs at the start of every call. On closer inspection however it appears that only part of the nat setup is taking place. sofia status gives: Name Type Data State ============================================================================ ===================== internal profile sip:mod_sofia@10.10.0.2:5080 RUNNING (0) external profile sip:mod_sofia@10.10.0.2:5060 RUNNING (0) default alias internal ALIASED 10.10.0.2 alias internal ALIASED ============================================================================ ===================== 2 profiles 2 aliases sofia status profile external gives (the external ip addresses are correct): API CALL [sofia(status profile external)] output: ============================================================================ ===================== Name external Domain Name N/A DBName sofia_reg_external Pres Hosts Dialplan XML,enum Context default Challenge Realm auto_to RTP-IP 10.10.0.2 Ext-RTP-IP 82.5.159.138 SIP-IP 10.10.0.2 Ext-SIP-IP 82.5.159.138 URL sip:mod_sofia@10.10.0.2:5060 BIND-URL sip:mod_sofia@10.10.0.2:5060 HOLD-MUSIC N/A OUTBOUND-PROXY N/A CODECS PCMU,PCMA,GSM TEL-EVENT 101 DTMF-MODE rfc2833 CNG 13 SESSION-TO 0 MAX-DIALOG 0 NOMEDIA false LATE-NEG false PROXY-MEDIA false AGGRESSIVENAT false STUN-ENABLED true STUN-AUTO-DISABLE false CALLS-IN 0 FAILED-CALLS-IN 0 CALLS-OUT 0 FAILED-CALLS-OUT 0 BUT...... nat_map status, gives: API CALL [nat_map(status)] output: false And there is no mention of nat detection in the startup log. Is this because I'm using port 5060 externally? Cheers Andy _____ From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Brian West Sent: 07 October 2009 15:22 To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] NAT problems - sorry Bet you its inband dtmf and you need to start the dtmf detector. /b On Oct 7, 2009, at 8:11 AM, Andy wrote: I can hear the IVR message played down the phone line so outgoing audio is ok.