I was wondering if anyone can help me. We (my company) are having a problem with sending calls to multiple Cisco ATA 186s behind a NAT. We get one way audio.....we have a company in Iraq that is part business, but also a relief organization. We need someone to help us get these calls working, so that a doctor from Boston can call into a hospital in Baghdad and work with the doctors there (for example). We have VoIP and networking people working on it, but there is a problem with the port assignments (not sure of more detail yet).
This is something we will pay for, just that we can't find the correct person. Does anyone know someone that has the experience w/ ATAs to help us?
Thanks Chris
_______________________________ Chris Mulhern Director, Business Development TigrisNet www.tigrisnet.net http://www.tigrisnet.net/ +1 (310) 827-7600 +1 (310) 617-3563 (Cell) +1 (888) 265-5046 (Fax) _______________________________
At 09:06 PM 12/21/2003, Chris Mulhern wrote:
I was wondering if anyone can help me. We (my company) are having a problem with sending calls to multiple Cisco ATA 186s behind a NAT. We get one way audio.....we have a company in Iraq that is part business, but also a relief organization. We need someone to help us get these calls working, so that a doctor from Boston can call into a hospital in Baghdad and work with the doctors there (for example). We have VoIP and networking people working on it, but there is a problem with the port assignments (not sure of more detail yet).
Well, ATAs don't have very good NAT traversal properties -- modern phones support STUN. Since there are NATs which are hard-to-traverse even for STUN-capable phones, you also need to solve such cases on the SER part. Getting over NATs is generaly a tricky manner for which you need a solid strategy. Let me know if you still need help on this.
-jiri
On Sun, 4 Jan 2004, Jiri Kuthan wrote:
At 09:06 PM 12/21/2003, Chris Mulhern wrote:
I was wondering if anyone can help me. We (my company) are having a problem with sending calls to multiple Cisco ATA 186s behind a NAT. We get one way audio.....we have a company in Iraq that is part business, but also a relief organization. We need someone to help us get these calls working, so that a doctor from Boston can call into a hospital in Baghdad and work with the doctors there (for example). We have VoIP and networking people working on it, but there is a problem with the port assignments (not sure of more detail yet).
Well, ATAs don't have very good NAT traversal properties -- modern phones support STUN. Since there are NATs which are hard-to-traverse even for STUN-capable phones, you also need to solve such cases on the SER part. Getting over NATs is generaly a tricky manner for which you need a solid strategy. Let me know if you still need help on this.
Version 3.0 of ATA software has STUN support and some other new features.
Saludos JesusR.
------------------------------- Jesus Rodriguez VozTelecom Sistemas, S.L. jesusr@voztele.com http://www.voztele.com Tel. 902360305 -------------------------------
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Chris Mulhern -
Jesus Rodriguez -
Jiri Kuthan