Patton SmartNode 4112

[fojin]

I have a Patton SmartNode 4112 FXO and a Patton SmartNode 4112 FXS.

I configured both units to connect an analog phone line over my local network. I had no problem with this whatsoever. I plugged a line from our Avaya Partner system into the FXO port on the FXO unit and then plugged a regular old telephone into the FXS port on the FXS unit.

It worked correctly - Calls to the extension rang on the other end, when the phone was lifted the call was connected and both parties could hear eachother.

Next, I wanted to move the setup over the internet rather than over the LAN. I changed the settings to reflect the public IP addressed and forwarded the ports on my router as described by the user manual.

I forwarded ports 4864 through 5375 to the respective local IP addresses on both routers.

Now, when a call is placed, the VOIP connection light on both units illuminates and the analog phone rings. It seems that things are working correctly.

When you lift the receiver, there is no call. It's just a hollow sound. No dial tone, no call, nothing.

Does anyone have any idea what could be wrong? Since the setup worked on the LAN, I'm thinking that I may have to open some other ports that weren't mentioned in the manual.... Is there anything I'm missing?

Thanks!

 

[mforrence]

You could use Wireshark and determine the ports in use. Or maybe capture packets on the router.

 

[fojin]

Thanks for the suggestion... If I use Wireshark, how canit be set up to monitor that kind of traffic. So far I have only been able to see connections to and from my workstation as opposed to the communication between these devices.

 

[mforrence]

Insert your own switch between one of the Patton devices and network - with a port configured for mirror. Use laptop with Wireshark on the mirror port.

 

[intrigrant]

The Pattons can sniffer themselves, the output comes in the Wireshark format so you can load it into wireshark and see what happens.
I think you have either a Firewall problem or a enabled "SIP enhancement" or whatever those router cowboys name the feature enabled.

 

[fojin]

Thanks to you both for your help and suggestions!

The problem is solved so I figured I'd come back and post the solution in case anyone runs across it in the future.

The two units worked perfectly when they were on the same local network but once I separated them, they would make the initial connection but the call wouldn't go through.

I had each unit's public IP address entered in the settings of the other unit and ports forwarded correctly.

When the receiver was lifted or a call was placed to the remote extension, the units would find eachother and their "VOIP Link" light would come on.

Using the log files from my router I saw that after that initial connection, the remote unit was then trying to connect to the local IP address of the remote unit. The units were connecting and then instructing eachother to use their local IP addresses for the next step.

There is a setting marked "Detect NAT address" in the "Telephony / SIP / Gateway GWSIP" menu.

Checked the box, problem solved.

Now I can go to bed happy tonight.