Obi202 Direct IP (Peer to Peer) Dialing
N2VWZ:
Quote from: Felix on April 18, 2012, 01:07:51 pm
Quote from: N2VWZ on April 18, 2012, 08:13:49 am
The SPA2000 works because the EXT IP parameter programmed with the WAN IP address. The OBi100 has no EXT IP parameter for setting the WAN IP.
EXT IP in SPA devices serve very narrow purpose, according to Cisco's administration guide:
If the ITSP network does not provide a Session Border Controller functionality, and if other requirements are met, you can configure NAT mapping to ensure interoperability with the ITSP.
Requirements:
You must have an external (public) IP address that is static.The NAT mechanism used in the router must be symmetric. See “Determining the Router’s NAT Mechanism”The LAN switch must be configured to enable Spanning Tree Protocol and Port Fast on the ports to which the SPA devices are connected.Per docs, if you are using EXT IP, you should disable STUN and enable VIA, Which is completely counter-intuitive given that STUN fields are in the middle between VIA and EXT IP.
So, I doubt that EXT IP setting has any effect on your SPA2000. I had it myself, assuming - just like you - that it is needed for direct dialing. Then I figured out how to do it, and then removed EXT IP value (or rather, my dynamic IP changed, so the value was obviously incorrect - so I cleared it) and it continued working.
"If the ITSP network does not provide a Session Border Controller functionality" In my case, there is no ITSP - This is Peer to Peer Communications.
My circled in red settings are all set to NO. It would be nice not to have to deal with Ext IP every time my WAN address changes. I will play around with this tonight.
I don't understand what the VIA settings do - Are copies of the Cisco Administration Guide for the SPA-2000 available? Do you know if any firmware updates are available? I called Cisco / Linksys a few years ago and said nothing was available.
Jim
Felix:
Quote from: N2VWZ on April 18, 2012, 03:51:36 pm
My circled in red settings are all set to NO. It would be nice not to have to deal with Ext IP every time my WAN address changes. I will play around with this tonight.
I don't understand what the VIA settings do - Are copies of the Cisco Administration Guide for the SPA-2000. Do you know if any firmware updates are available? I called Cisco / Linksys a few years ago and said nothing was available.
Jim
That's my point exactly. My understanding is if VIA is set to no, then the value in EXT IP is ignored. As I said earlier, it's not very intuitive. Take a look at the admin guide here.
Firmware has been recently update as well. I just realized that my model is 3102 rather than 2102 (it doesn't change anything that I said... the only difference is PSTN line, of course). But firmware is different for different models. Start here.
NOTE: Obviously, I realize that it is OBiHAI forum, and I don't want to take the conversation into a discussion of competing products (even though, I am sure, SPA adapters are near and dear to OBiHai founder's heart). On any other day I'd suggest that we continue this conversation on DSL Reports. But, unfortunately, DSLR suffered a major outage yesterday. So, if moderators object - I understand.
N2VWZ:
Quote from: Felix on April 18, 2012, 04:42:39 pm
That's my point exactly. My understanding is if VIA is set to no, then the value in EXT IP is ignored. As I said earlier, it's not very intuitive. Take a look at the admin guide here.
Firmware has been recently update as well. I just realized that my model is 3102 rather than 2102 (it doesn't change anything that I said... the only difference is PSTN line, of course). But firmware is different for different models. Start here.
NOTE: Obviously, I realize that it is OBiHAI forum, and I don't want to take the conversation into a discussion of competing products (even though, I am sure, SPA adapters are near and dear to OBiHai founder's heart). On any other day I'd suggest that we continue this conversation on DSL Reports. But, unfortunately, DSLR suffered a major outage yesterday. So, if moderators object - I understand.
Felix,
I ran some tests last night. I set the VIA parameters to Yes and deleted the Ext IP entry. With this configuration I was able to ring phones in both directions, but no voice connection could be established in either direction.
This was expected because the SPA2000 behind a NAT has no knowledge of the WAN IP address and cannot properly format the SIP packets.
We're not completely off topic since we are trying to replace a Sipura product that is no longer available with a new Obihai product. This is a discussion of compatibility issues.
There's not presently any support for Ext IP in any of the Obihai products. I'd like to see this feature added, or preferably, support for Ext URL instead of Ext IP. Ext URL would handle dynamically changing IP addresses and provide a simple solution to NAT transversal without resorting to a third party STUN server.
Felix:
Frankly, I have no idea what VIA does ???
All I am saying is that I assumed that EXT IP helps STUN to communicate WAN IP address, and I found out that STUN doesn't need any help. So, I removed EXT IP and it had no bad effect. In fact, in the end I was able to direct connect (both connection and voice) by just forwarding SIP and RTP ports on the router.
I played with direct dialing a month ago, but now all my adapters are serving friends and family and are registered to VSP. And I have several VoIP devices at home - so I am very nervous to forward RTP ports to one of them. So, I don't have equipment to test at this time...
RonR:
Quote from: Felix on April 19, 2012, 10:00:45 am
And I have several VoIP devices at home - so I am very nervous to forward RTP ports to one of them. So, I don't have equipment to test at this time...
I have multiple devices on the same LAN. I give each of them their own unique block of RTP ports and forward each block to the appropriate device's LAN address. The prevents any accidental use of the same port by two devices at the same time and allows direct (SIP URI) communications to work with each device.
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