Sonicwall NSA 2400 VPN with VOIP NEC SV8100 and DT700 IP Phone

Hello, I have an Sonicwall NSA 2400 and a NEC SV8100 Phone system in my office.  On the remote site I have a sonicwall tz100 and an NEC DT700.  The VPN is configured and on.  I can ping anything from one side to an other.  I can open up shared folders from either side no problems.  The NEC DT700 does not connect to the SV8100 (SIP Server Not Found).  If I bring the phone back to the main office it connects with no problems, two way traffic and everything.  I guess I'm missing a rule and have been doing research for 2 days now.  Thank you for any sugestions.
Edgardo VazquezIT TechAsked:
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Are you using TCP or UDP?   Have you looked in your sonicwall logs to see if something like application control or intrusion prevention isnt blocking the traffic?  Just as a test turn those both off on each firewall.

I have a SIP trunk from an Avaya to a ShoreTel running over a NSA2400 and TZ210 VPN and it works fine.  I do not recall having to do anything special, but I had already made changes to the application control and intrusion prevention settings way before attempting this.

Unfortunately, I am not familiar with a NEC system, but the Avaya has Monitor and system status which allows you to see what traffic is coming and going.    You can alway setup wireshark at both sites to see what traffic is comnig and going.
Do you have anything checked on your VoIP --> settings page on the sonicwalls?  All my check boxes are cleared.

What version of sonicwall are you running?
Edgardo VazquezIT TechAuthor Commented:
Sorry guys, had to switch it to site to site VPNs to correct the issues.  Sonicwall could not even figure it out.  VPN's are running well.  Thanks

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Edgardo VazquezIT TechAuthor Commented:
Would had preffered not using VPN's but the job was rushed

What do you mean you had to switch to site to site?  In your initial question you led us to believe that you already had that configured by stating, " The VPN is configured and on"

We cannot help those who:
1. Post inaccurate or misleading questions to start
2. Do not reply to any of the questions we ask.  
Edgardo VazquezIT TechAuthor Commented:
Sorry I thought I was answering another question I had posted before about doing NAT transversal.  The resolve of the VPN setup was the phone vendor had to turn off NAT transversal on the SV8100.  Apologies I did not mean to mis lead.  Tell you what, in reguards to this question there is the occassional choppy voice I assume when traffice is high.  How can I setup some guarentee bandwith from the main site which has a 30mb fiber to the off site cable connections (Sonic wall NSA2400 to Sonicwall TZ100).
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