nathans Posted February 24, 2012 Report Share Posted February 24, 2012 Hi, I have a snomone+ with a bunch of internal (in the lan) and external (via the internet) phones connecting no problems....except in one external location. This is a regular DSL connection house were I have connected a 300 (and tried also with a 821) both running the latest .35 FW. WIth any of the phones I can get incoming calls perfectly with excellent audio. The problem is this phone can NOT dial to any of the other extensions. On it you do not even get a dialing or busy signal and on the remote extension you get 1ring and then nothing more. Any ideas on what to start looking for? On the DLS modem I have even tried putting the phone in a DMZ zone to see if this helps. Nothing. I have the required ports open on the snomone+ location firewall and have some 5 others phones registering remotely from other locations with no problem. It is only this one location. Any ideas? Tkx Nathan Quote Link to comment Share on other sites More sharing options...
nathans Posted February 24, 2012 Author Report Share Posted February 24, 2012 Here is the log from the snomone on an attempted call from extension 7788 (the external problem one to extension 9999. 192.168.30.2 is the LAN IP address of the snomone+ [7] 2012/02/23 21:58:03: SIP Rx udp:189.25.204.17:22928: INVITE sip:9999@192.168.30.2:5060;user=phone SIP/2.0 Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-w7plx9ppz0hw;rport From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone> Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 1 INVITE Max-Forwards: 70 Contact: <sip:7788@189.25.204.17:22928;line=7ybp1ezv>;reg-id=1 X-Serialnumber: 0004133B3E16 P-Key-Flags: keys="3" User-Agent: snom300/8.4.35 Accept: application/sdp Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE Allow-Events: talk, hold, refer, call-info Supported: timer, 100rel, replaces, from-change Call-Info: <sip:187.174.100.120>;appearance-index=1 Session-Expires: 3600;refresher=uas Min-SE: 90 Proxy-Require: buttons Content-Type: application/sdp Content-Length: 533 v=0 o=root 642205070 642205070 IN IP4 189.25.204.17 s=call c=IN IP4 189.25.204.17 t=0 0 m=audio 22972 RTP/AVP 0 8 9 2 3 18 4 101 a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:Uu3rCyl9ghfeMZrR2Z18tEwKwzutivBHnjdRfbMR a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:9 G722/8000 a=rtpmap:2 G726-32/8000 a=rtpmap:3 GSM/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:4 G723/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:20 a=rtcp-22973xr:voip-metrics stat-summary=loss,dup,jitt a=sendrecv [7] 2012/02/23 21:58:03: SIP Tx udp:189.25.204.17:22928: SIP/2.0 100 Trying Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-w7plx9ppz0hw;rport=22928 From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 1 INVITE Content-Length: 0 [7] 2012/02/23 21:58:03: SIP Tx udp:189.25.204.17:22928: SIP/2.0 401 Authentication Required Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-w7plx9ppz0hw;rport=22928 From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 1 INVITE User-Agent: snom-PBX/2011-4.2.1.4025 WWW-Authenticate: Digest realm="192.168.30.2",nonce="b8977264cfb4066cfecd45ea0d085090",domain="sip:9999@192.168.30.2:5060;user=phone",algorithm=MD5 Content-Length: 0 [7] 2012/02/23 21:58:03: SIP Rx udp:189.25.204.17:22928: ACK sip:9999@192.168.30.2:5060;user=phone SIP/2.0 Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-w7plx9ppz0hw;rport From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 1 ACK Max-Forwards: 70 Contact: <sip:7788@189.25.204.17:22928;line=7ybp1ezv>;reg-id=1 Proxy-Require: buttons Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Rx udp:189.25.204.17:22928: CANCEL sip:9999@192.168.30.2:5060;user=phone SIP/2.0 Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-tnlw528ee5y9;rport From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone> Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 2 CANCEL Max-Forwards: 70 Reason: SIP;cause=487;text="Request terminated by user" Proxy-Require: buttons Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx udp:189.25.204.17:22928: SIP/2.0 100 Trying Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-tnlw528ee5y9;rport=22928 From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 2 CANCEL Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx udp:216.19.16.77:3072: INVITE sip:9999@216.19.16.77:3072;line=msef87x4 SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com> Call-ID: 15293691@pbx CSeq: 17146 INVITE Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> Supported: 100rel, replaces, norefersub Allow-Events: refer Allow: INVITE, ACK, CANCEL, BYE, REFER, PRACK, INFO, UPDATE Accept: application/sdp User-Agent: snom-PBX/2011-4.2.1.4025 Alert-Info: <http://127.0.0.1/Bellcore-dr2> Content-Type: application/sdp Content-Length: 384 v=0 o=- 1576670420 1576670420 IN IP4 192.168.30.2 s=- c=IN IP4 192.168.30.2 t=0 0 m=audio 59018 RTP/AVP 0 8 9 18 2 3 101 a=rtpmap:0 pcmu/8000 a=rtpmap:8 pcma/8000 a=rtpmap:9 g722/8000 a=rtpmap:18 g729/8000 a=fmtp:18 annexb=no a=rtpmap:2 g726-32/8000 a=rtpmap:3 gsm/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=rtcp-xr:rcvr-rtt=all voip-metrics a=sendrecv [7] 2012/02/23 21:58:09: SIP Rx udp:189.25.204.17:22928: CANCEL sip:9999@192.168.30.2:5060;user=phone SIP/2.0 Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-tnlw528ee5y9;rport From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone> Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 2 CANCEL Max-Forwards: 70 Reason: SIP;cause=487;text="Request terminated by user" Proxy-Require: buttons Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tr udp:189.25.204.17:22928: SIP/2.0 100 Trying Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-tnlw528ee5y9;rport=22928 From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 2 CANCEL Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx udp:75.149.181.121:3072: INVITE sip:9999@192.168.88.107:3072;line=ad4e2gld SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com> Call-ID: 19bbc33d@pbx CSeq: 16740 INVITE Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> Supported: 100rel, replaces, norefersub Allow-Events: refer Allow: INVITE, ACK, CANCEL, BYE, REFER, PRACK, INFO, UPDATE Accept: application/sdp User-Agent: snom-PBX/2011-4.2.1.4025 Alert-Info: <http://127.0.0.1/Bellcore-dr2> Content-Type: application/sdp Content-Length: 384 v=0 o=- 1241561074 1241561074 IN IP4 192.168.30.2 s=- c=IN IP4 192.168.30.2 t=0 0 m=audio 64382 RTP/AVP 0 8 9 18 2 3 101 a=rtpmap:0 pcmu/8000 a=rtpmap:8 pcma/8000 a=rtpmap:9 g722/8000 a=rtpmap:18 g729/8000 a=fmtp:18 annexb=no a=rtpmap:2 g726-32/8000 a=rtpmap:3 gsm/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=rtcp-xr:rcvr-rtt=all voip-metrics a=sendrecv [7] 2012/02/23 21:58:09: SIP Tx udp:189.25.204.17:22928: SIP/2.0 200 Ok Via: SIP/2.0/UDP 189.25.204.17:22928;branch=z9hG4bK-tnlw528ee5y9;rport=22928 From: "Jacobo " <sip:7788@192.168.30.2:5060>;tag=bpgfum53tr To: <sip:9999@192.168.30.2:5060;user=phone>;tag=49c5c1f64d Call-ID: 3c2677382783-7fnzl9w6qqo7 CSeq: 2 CANCEL Contact: <sip:7788@192.168.30.2:5060> User-Agent: snom-PBX/2011-4.2.1.4025 Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx tls:192.168.30.106:3117: SIP/2.0 487 Request Terminated From: <> To: <> Call-ID: CSeq: 0 Contact: <sip:7788@192.168.30.2:5061> Supported: 100rel, replaces, norefersub Allow-Events: refer Allow: INVITE, ACK, CANCEL, BYE, REFER, PRACK, INFO, UPDATE Accept: application/sdp User-Agent: snom-PBX/2011-4.2.1.4025 Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx udp:216.19.16.77:3072: CANCEL sip:9999@216.19.16.77:3072;line=msef87x4 SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com> Call-ID: 15293691@pbx CSeq: 17146 CANCEL Max-Forwards: 70 Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Tx udp:75.149.181.121:3072: CANCEL sip:9999@192.168.88.107:3072;line=ad4e2gld SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com> Call-ID: 19bbc33d@pbx CSeq: 16740 CANCEL Max-Forwards: 70 Content-Length: 0 [3] 2012/02/23 21:58:09: Could not connect to 74.208.67.196:8888 [1] 2012/02/23 21:58:09: Could not send via TCP: 36 bytes [7] 2012/02/23 21:58:09: SIP Rx udp:75.149.181.121:3072: SIP/2.0 180 Ringing Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16740 INVITE Contact: <sip:9999@192.168.88.107:3072;line=ad4e2gld>;reg-id=1 Require: 100rel RSeq: 1 Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE Allow-Events: talk, hold, refer, call-info Content-Length: 0 [5] 2012/02/23 21:58:09: Call 19bbc33d@pbx: Last request not finished [7] 2012/02/23 21:58:09: SIP Tx udp:75.149.181.121:3072: PRACK sip:9999@192.168.88.107:3072;line=ad4e2gld SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-80a284f90c91b350b17fa32bd6ed2db5;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16741 PRACK Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> RAck: 1 16740 INVITE Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Rx udp:75.149.181.121:3072: SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16740 CANCEL Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Rx udp:75.149.181.121:3072: SIP/2.0 487 Request Terminated Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16740 INVITE Contact: <sip:9999@192.168.88.107:3072;line=ad4e2gld>;reg-id=1 Content-Length: 0 [7] 2012/02/23 21:58:09: Call 19bbc33d@pbx: Clear last INVITE [7] 2012/02/23 21:58:09: SIP Tx udp:75.149.181.121:3072: ACK sip:9999@192.168.88.107:3072;line=ad4e2gld SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-64737b79c64e7dda8e1071014447f2da;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16740 ACK Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> Content-Length: 0 [5] 2012/02/23 21:58:09: INVITE Response 487 Request Terminated: Terminate 19bbc33d@pbx [7] 2012/02/23 21:58:09: SIP Rx udp:216.19.16.77:3072: SIP/2.0 100 Trying Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17146 INVITE Contact: <sip:9999@216.19.16.77:3072;line=msef87x4>;reg-id=1 Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Rx udp:216.19.16.77:3072: SIP/2.0 180 Ringing Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17146 INVITE Contact: <sip:9999@216.19.16.77:3072;line=msef87x4>;reg-id=1 Require: 100rel RSeq: 1 Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE Allow-Events: talk, hold, refer, call-info Content-Length: 0 [5] 2012/02/23 21:58:09: Call 15293691@pbx: Last request not finished [7] 2012/02/23 21:58:09: SIP Tx udp:216.19.16.77:3072: PRACK sip:9999@216.19.16.77:3072;line=msef87x4 SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-e37fd0d92c9114104c622a8936e89505;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17147 PRACK Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> RAck: 1 17146 INVITE Content-Length: 0 [7] 2012/02/23 21:58:09: SIP Rx udp:75.149.181.121:3072: SIP/2.0 481 Call Leg/Transaction Does Not Exist Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-80a284f90c91b350b17fa32bd6ed2db5;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=1112862256 To: "Nathan" <sip:9999@pbx.snom.com>;tag=l34qs3dgkb Call-ID: 19bbc33d@pbx CSeq: 16741 PRACK User-Agent: snom870/8.4.33 Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE Allow-Events: talk, hold, refer, call-info Supported: timer, 100rel, replaces, from-change Content-Length: 0 [3] 2012/02/23 21:58:09: Could not connect to 74.208.67.196:8888 [1] 2012/02/23 21:58:09: Could not send via TCP: 36 bytes [7] 2012/02/23 21:58:09: SIP Tr udp:216.19.16.77:3072: CANCEL sip:9999@216.19.16.77:3072;line=msef87x4 SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com> Call-ID: 15293691@pbx CSeq: 17146 CANCEL Max-Forwards: 70 Content-Length: 0 [7] 2012/02/23 21:58:10: SIP Rx udp:216.19.16.77:3072: SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17146 CANCEL Content-Length: 0 [7] 2012/02/23 21:58:10: SIP Rx udp:216.19.16.77:3072: SIP/2.0 487 Request Terminated Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17146 INVITE Contact: <sip:9999@216.19.16.77:3072;line=msef87x4>;reg-id=1 Content-Length: 0 [7] 2012/02/23 21:58:10: Call 15293691@pbx: Clear last INVITE [7] 2012/02/23 21:58:10: SIP Tx udp:216.19.16.77:3072: ACK sip:9999@216.19.16.77:3072;line=msef87x4 SIP/2.0 Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-1e9e57e84c9ce2bcdf8b6a220d2d25c0;rport From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17146 ACK Max-Forwards: 70 Contact: <sip:9999@192.168.30.2:5060;transport=udp> Content-Length: 0 [5] 2012/02/23 21:58:10: INVITE Response 487 Request Terminated: Terminate 15293691@pbx [3] 2012/02/23 21:58:10: Could not connect to 74.208.67.196:8888 [1] 2012/02/23 21:58:10: Could not send via TCP: 36 bytes [7] 2012/02/23 21:58:10: SIP Rx udp:216.19.16.77:3072: SIP/2.0 481 Call Leg/Transaction Does Not Exist Via: SIP/2.0/UDP 192.168.30.2:5060;branch=z9hG4bK-e37fd0d92c9114104c622a8936e89505;rport=5060 From: "Jacobo " <sip:7788@pbx.snom.com>;tag=514136832 To: "Nathan" <sip:9999@pbx.snom.com>;tag=dt3ujuapv2 Call-ID: 15293691@pbx CSeq: 17147 PRACK User-Agent: snom821/8.4.35 Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE Allow-Events: talk, hold, refer, call-info Supported: timer, 100rel, replaces, from-change Content-Length: 0 Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted February 24, 2012 Report Share Posted February 24, 2012 You are experiencing the famous "NAT" problem. In a nutshell, in VoIP you must make sure that the PBX runs on a "routable" IP address. Routable means routable for the registered phones and PSTN gateways, and also sometimes routable for service providers that dont have a session border controller. You can achieve the routable by running the PBX at least on one interface on a "public" IP; here you must make sure that the routing table is set up properly, sometimes the OS picks the private IP address as the "preferred" IP address which would cause problems then. Another way to get routable IP addresses is to use a VPN for the company. This also solves the problem as if everything would be in the LAN. Putting the PBX into a DMZ is possible, but very tricky because especially the RTP ports can be very hard to predict and TCP port forwarding also can be tricky. IPv6 offers very cheap routable IP addresses, but is as of today not widely available. One nice day when IPv6 is available, we can save a lot of time for things like this. Quote Link to comment Share on other sites More sharing options...
nathans Posted February 24, 2012 Author Report Share Posted February 24, 2012 Thanks. I also thought this was the problem. But you see, the PBX is indeed with a public and routable IP address with the correct port forwarding. I have about 5 extensions registering remotely to it and being able to make and received calls from It is only one remote extension that is showing this problems of not being able to make outgoing calls. Are you referring to the fact that this one extension needs something special besides being either on a DMZ or with the correct SIP and UDP ports forwarded? Quote Link to comment Share on other sites More sharing options...
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