Outside clients with 3CX & Linksys SPA 3102

[optix]

Hi all,

I have a following setup:

Internet line coming to Cisco router (public, static IP)
3CX box behind NAT (IP - 10.10.10.202), tcp ports 5060, 5090; udp ports 5060,9000-9015 forwarded to the machine. Current ver 6.1.0
Linksys SPA 3102 voice gateway (IP - 10.10.10.137 connected to WAN port) with an outside POTS line connected

I've tried all possible combinations that I could think of in order to get outside clients (also behind NAT) to make calls but without much success. Registration passes with STUN enabled on the phones, but in best case when making call only one side can be heard.

I could go on about the things I've tried, but before I go into that, I'm just wondering if this can be generally achieved?
Unfortunately I cannot assign public address to any of the machines, but I can forward any port. Local calls to outside POTS network and vice versa works fine.

If this can be done, can some one point me to the correct configuration, or to the nature of problem?
Greatly appreciated!

 

[discovery1]

Is there any reason you are not using the latest version of 3CX?
Can you give us the make and model of the phones you are using externally?

Have you tried using the 3CX VOIP client to test with as well?

Can you set the server logging to verbose and make some calls and post the results here so we can have a look at the call progress?

 

[optix]

There is, I wasn't able to get some of the features I needed to work on version 7. Irrelevant to this issue. But while version 7 was installed, it still wasn't working.

Outside clients are Nokia E51's, using default SIP client (with advanced SIP VoIP settings - to enable STUN).
I have tried with 3CX VoIP client, but it only works in tunnel mode.

I'm pasting the current log file, when outside client registers and tries to make a call.
I'll reboot in verbose mode in a minute.

21:35:43.939  	MediaServerReporting::RTPReceiver  	[MS105000] C:29.1: No RTP packets were received:remoteAddr=212.200.240.5:49152,extAddr=89.216.209.3:9006,localAddr=89.216.209.3:9006
21:35:28.423 	ExtnCfg::updateContact 	[CM504002]: Ext.103: a contact is unregistered. Contact(s): []
21:35:11.735 	Call::Terminate 	[CM503008]: Call(29): Call is terminated
21:35:11.735 	Call::Terminate 	[CM503008]: Call(29): Call is terminated
21:35:11.735 	Call::Terminate 	[CM503008]: Call(29): Call is terminated
21:35:11.735 	InviteADS::onAckNotReceived 	[CM503019]: Call(29): ACK is not received
21:34:39.689 	CallCtrl::onLegConnected 	[CM503007]: Call(29): Device joined: sip:[email protected]:5061
21:34:39.689 	CallCtrl::onLegConnected 	[CM503007]: Call(29): Device joined: sip:[email protected]:1070;transport=UDP
21:34:39.673 	Line::printEndpointInfo 	[CM505002]: Gateway:[Telekom] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Linksys/SPA3102-5.1.7(GW)] Transport: [sip:10.10.10.202:5060]
21:34:39.673 	CallCtrl::onAnsweredCall 	[CM503002]: Call(29): Alerting sip:[email protected]:5061
21:34:39.579 	CallCtrl::onSelectRouteReq 	[CM503004]: Call(29): Calling: PSTNline:3060606@(Ln.10000@Telekom)@[Dev:sip:[email protected]:5061]
21:34:39.579 	CallCtrl::onSelectRouteReq 	[CM503010]: Making route(s) to [sip:[email protected];user=phone]
21:34:39.579 	Extension::printEndpointInfo 	[CM505001]: Ext.103: Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Nokia RM-244 200.34.36] Transport: [sip:10.10.10.202:5060]
21:34:39.579 	CallCtrl::onIncomingCall 	[CM503001]: Call(29): Incoming call from Ext.103 to [sip:[email protected];user=phone]
21:34:17.579 	ExtnCfg::updateContact 	[CM504001]: Ext.103: new contact is registered. Contact(s): [sip:[email protected]:1070;transport=UDP/103]

Here it is in verbose

21:46:32.562	Call::Terminate	[CM503008]: Call(2): Call is terminated
21:46:32.562	Call::Terminate	[CM503008]: Call(2): Call is terminated
21:46:32.562	Call::Terminate	[CM503008]: Call(2): Call is terminated
21:46:32.562	InviteADS::onAckNotReceived	[CM503019]: Call(2): ACK is not received
21:46:00.453	CallCtrl::onLegConnected	[CM503007]: Call(2): Device joined: sip:[email protected]:5061
21:46:00.453	CallCtrl::onLegConnected	[CM503007]: Call(2): Device joined: sip:[email protected]:1027;transport=UDP
21:46:00.453	MediaServerReporting::SetRemoteParty	[MS210003] C:2.1:Answer provided. Connection(transcoding mode):89.216.209.3:9002(9003)
21:46:00.437	MediaServerReporting::SetRemoteParty	[MS210001] C:2.2:Answer received. RTP connection: 10.10.10.137:16414(16415)
21:46:00.421	Line::printEndpointInfo	[CM505002]: Gateway:[Telekom] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Linksys/SPA3102-5.1.7(GW)] Transport: [sip:10.10.10.202:5060]
21:46:00.421	CallLeg::setRemoteSdp	Remote SDP is set for legC:2.2
21:46:00.421	CallCtrl::onAnsweredCall	[CM503002]: Call(2): Alerting sip:[email protected]:5061
21:46:00.296	MediaServerReporting::SetRemoteParty	[MS210002] C:2.2:Offer provided. Connection(transcoding mode): 10.10.10.202:7000(7001)
21:46:00.265	CallCtrl::onSelectRouteReq	[CM503004]: Call(2): Calling: PSTNline:3060606@(Ln.10000@Telekom)@[Dev:sip:[email protected]:5061]
21:46:00.250	CallCtrl::onSelectRouteReq	[CM503010]: Making route(s) to [sip:[email protected];user=phone]
21:46:00.250	MediaServerReporting::SetRemoteParty	[MS210000] C:2.1:Offer received. RTP connection: 212.200.240.5:49152(49153)
21:46:00.250	CallLeg::setRemoteSdp	Remote SDP is set for legC:2.1
21:46:00.250	Extension::printEndpointInfo	[CM505001]: Ext.103: Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Nokia RM-244 200.34.36] Transport: [sip:10.10.10.202:5060]
21:46:00.250	CallCtrl::onIncomingCall	[CM503001]: Call(2): Incoming call from Ext.103 to [sip:[email protected];user=phone]
21:46:00.046	CallLeg::onNewCall	[CM500002]: Info on incoming INVITE:
INVITE sip:[email protected];user=phone SIP/2.0
Via: SIP/2.0/UDP 212.200.240.5:1030;branch=z9hG4bKein7glk8vvoq7nufa581fij;rport=1028
Max-Forwards: 70
Route: [sip:optix.dyndns.org;lr;transport=UDP]
Contact: [sip:[email protected]:1027;transport=UDP]
To: [sip:[email protected];user=phone]
From: [sip:[email protected]];tag=lrf52k53nhhc732d069i
Call-ID: dw5hk3GroId5Vg6j9UJHOmc0-JknuF
CSeq: 903 INVITE
Expires: 120
Accept: application/sdp
Allow: INVITE, ACK, BYE, CANCEL, REFER, NOTIFY, OPTIONS, PRACK
Proxy-Authorization: Digest realm="3CXPhoneSystem",nonce="12876785159:7167c575f5f543fcf729f243fda62569",algorithm=MD5,username="103",uri="sip:[email protected];user=phone",response="1635a582a8f5c67b1d356c1b39d786d4"
Supported: 100rel, sec-agree
User-Agent: Nokia RM-244 200.34.36
Privacy: none
P-Preferred-Identity: sip:[email protected]
Content-Length: 0

21:45:48.843	ExtnCfg::updateContact	[CM504001]: Ext.103: new contact is registered. Contact(s): [sip:[email protected]:1027;transport=UDP/103]

 

[discovery1]

So for clarification - you are using Nokia E51's remotely to make calls through 3CX and out through a Linksys SPA3102 via it's PSTN line?
I also see that you are using dynamic DNS for the remote ends - ext 103 is the remote extension?

I take it you have followed the setup for the E65 as the E51's aren't supported
http: //www.3cx.com/sip-phones/nokia-e65/ - NO LONGER AVAILABLE

And set up the SPA3102 as per the guide
http: //www.3cx.com/voip-gateways/linksys-3102/ - NO LONGER AVAILABLE

Can an extension on the same LAN as 3CX make a call through the SPA3102?
Can you check the firmware version in the SPA3102 to see if it is the same or newer than the version in the guide?

This is the problem

21:35:11.735 InviteADS:nAckNotReceived [CM503019]: Call(29): ACK is not received
21:34:39.689 CallCtrl:nLegConnected [CM503007]: Call(29): Device joined: sip:[email protected]:5061
21:34:39.689 CallCtrl:nLegConnected [CM503007]: Call(29): Device joined: sip:[email protected]:1070;transport=UDP
21:34:39.673 Line:rintEndpointInfo [CM505002]: Gateway:[Telekom] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [Linksys/SPA3102-5.1.7(GW)] Transport: [sip:10.10.10.202:5060]
21:34:39.673 CallCtrl:nAnsweredCall [CM503002]: Call(29): Alerting sip:[email protected]:5061
21:34:39.579 CallCtrl:nSelectRouteReq [CM503004]: Call(29): Calling: PSTNline:3060606@(Ln.10000@Telekom)@[Dev:sip:[email protected]:5061]
21:34:39.579 CallCtrl:nSelectRouteReq [CM503010]: Making route(s) to [sip:[email protected];user=phone]

Here is some documentation on how to analyse a SIP call setup which may help - the section you want is halfway down the page
http: //wiki.3cx.com/Home/technical-documentation-dash/analyzing-call-setup - NO LONGER AVAILABLE

 

[optix]

Thanks for replying.

So for clarification - you are using Nokia E51's remotely to make calls through 3CX and out through a Linksys SPA3102 via it's PSTN line?
I also see that you are using dynamic DNS for the remote ends - ext 103 is the remote extension?

All correct.
Dynamic DNS is just resolving to my IP 89.216.209.3 I've set up Local SIP domain on 3CX to be that domain. However, I've tried with plain IP address (both local and public) with same result on making calls from outside.
What would be the correct setting here, considering that machine is behind NAT?

I take it you have followed the setup for the E65 as the E51's aren't supported
http: //www.3cx.com/sip-phones/nokia-e65/ - NO LONGER AVAILABLE

Yes. Almost same settings are used when device is in the same LAN (only difference is the IP address) and they work.

And set up the SPA3102 as per the guide
http: //www.3cx.com/voip-gateways/linksys-3102/ - NO LONGER AVAILABLE

Yes.

Can an extension on the same LAN as 3CX make a call through the SPA3102?
Can you check the firmware version in the SPA3102 to see if it is the same or newer than the version in the guide?

Yes, all is working fine when clients are in the same LAN.
Firmware is the same.


Has anyone successfully configured this to work?

 

[discovery1]

Yes. Almost same settings are used when device is in the same LAN (only difference is the IP address) and they work.

How do the E51's connect to 3CX when they are in the same LAN, Wireless?
If it works using wireless then it could be either a firewall issue at the remote end or possibly a latency issue across the mobile phone network.

Has anyone successfully configured this to work?

As far as i know you are the first person to try this configuration. Packet loss and jitter across a 3G mobile network would possibly render the whole thing unworkable and cause the issues you are seeing. I did try doing this a couple of years ago from the mobile phone (E65) to a 3CX extension on the LAN and the quality was very average. Can you successfully call from a remote E51 to an extension on the LAN and get good call quality?

Try enabling "PBX delivers Audio" for the remote extensions.

 

[optix]

How do the E51's connect to 3CX when they are in the same LAN, Wireless?
If it works using wireless then it could be either a firewall issue at the remote end or possibly a latency issue across the mobile phone network.

Yes, WiFi. They also use WiFi when outside, I don't use GSM/UMTS network for this.
There's also no firewall anywhere, except for NAT.

Can you successfully call from a remote E51 to an extension on the LAN and get good call quality?

I can, apart from some small delay, overall quality is very acceptable.
I have a feeling that problem lies somewhere on the SPA3102 device, but I don't see any logically related setting.

Try enabling "PBX delivers Audio" for the remote extensions.

Will do.

^ I just checked, option was enabled for that extension (103).

 

[discovery1]

Check the 3102 settings in the Voice > PSTN Line section - make sure the preferred codec is something like 711u and the option "use pref codec only" is set to no

Obviously the "VOIP to PSTN" section needs to be enabled