Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC
 ·North State Commun..
| reply to tschmidt
Re: [Info] ONT interfering with SIP?
said by tschmidt  :SIP is just for setup and teardown. Actual stream is direct. Since you are having other steaming problems perhaps there is really nothing wrong with VoIP but a more general streaming problem. Is this Verizon FIOS? If so may be better to have mods move it to FIOS forum. /tom Unfortunately not. It's a regional ILEC called North State Communications. It's all BPON gear though, so it's very similar to FiOS.
And you're right, it seems like an RTP problem to me now. I've been able to finagle and cajole SIP to work on their 212.x subnet (but I still can't get it to work on the 74.x network at all), but no RTP packets pass.
This is really frustrating. They tried to brush me off yesterday and say, "Well, if you have internet access there's nothing else we can do." Argh! |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
1 edit | Plot thickens.
I took the cover off the ONT to get the model number (ZNID-GPON-4213-EL) and noticed a few things.
1) It's a GPON ONT.
2) It (get this) supports VoIP and BOTH VoIP "off-hook" LEDs are illuminated green.
3) It has SIP/RTP ALGs (Application Layer Gateways) built-in
Here is the ONT: »www.zhone.com/products/ZNID-GPON/
That thing has to have some type of SIP/RTP ALG enabled that shouldn't be.
(Edit)
Success! I pushed and pushed and finally spoke to a network engineer. He knew exactly what I was referring to and hinted that the ZNIDs do have VoIP issues (he asked specifically if I was using Vonage) and said the ALGs are probably at fault. He's going to send a tech out so he can work directly with the tech on-site.
Man I hope this is it. |
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tschmidt
Premium,MVM
join:2000-11-12
Milford, NH
 ·Hollis Hosting
·Verizon Online DSL
·Fairpoint Communic..
| GPON does a lot of neat stuff compared to APON/BPON. Besides raw increase in speed does away with ATM. Data sheet is interesting in that it looks like POTS emulation is being done as VoIP. With BPON POTS was carried by reserved ATM virtual circuit - similar to having Telco install Remote Terminal.
My guess is that NAT is active in one-to-one mode as opposed to typical residential one-to-many. So effect is to modify port addresses (NAPT) not IP address to "sneak" in VoIP, and perhaps other stuff, without "consuming" another public IP.
quote:
NAT
- NAT-NAPT
- Application Level Gateway (ALGs) modules
- Port triggering
- STUN pass through
Voice Support
- SIP
- SIP PLAR
- Codec Support: G.711, G.723, G.726, G.729
- T.38 support for fax
- VAD, Silence suppression, comfort noise
generation
- Major CLASS features supported
- RTP/RTCP
- SDP
- RTP payload for DTMF digits
- 5 REN per port
- VoIP QoS:
-Layer 3 QoS: control ToS and DSCP for VoIP
- RTP:
- Prioritization of voice over data
»www.zhone.com/products/ZNID-GPON···GPON.pdf
Should be an interesting troubleshooting session.
/tom |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
| said by tschmidt :Should be an interesting troubleshooting session. /tom That's definitely one way of putting it! Although I'd probably choose a different adjective. 
You know, when the guy originally replaced my ONT he kept picking up my IP phone to see if it was working. That confused me and I had to tell him 2 or 3 times that it wasn't their phone. I didn't think anything about it at the time, but I bet he enabled VoIP stuff thinking my VoIP phone was provided by them. When he finally understood he said, "Oh, we don't provide you phone service?"
I bet he didn't turn off the VoIP stuff he enabled because I was running my VoIP phone across a backup Road Runner connection that I installed right before he fixed my North State connection. I bet he thought it was running across the North State connection and everything was fine ...
Cool info about BPON vs. GPON too. I didn't know there was such drastic differences; I just assumed GPON had a higher node speed. |
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