well, ...,we did not choose SIP because our customers are located behind NAT router (using private IP's) and those routers<br>are not managed by them but by the ISP so it is very difficult to establish full duplex phone calls because
<br>you can not initiate voice over ip session from the internet (outside) to LAN side (inside) with private IP's. We could not establish <br>2-way phone calls, I mean, the conversation is listened in 1-way only. As I mentioned before, we can not configure PAT into the NAT router neither
<br>because is handled by the ISP and the passwords are unknown ....<br>That's why we decided to use IAX instead of SIP, I mean, IAX is more robust than SIP when the NAT router is 3th-party managed and<br>the PAT feature is not enable.
<br>On the other and we tested IAX over dialup links and it worked fine....<br>Those are the reasons we choose IAX as "acess protocol" to our SIP/H323 Network. You know, the access networks of the customers are different completely: Private IP Address over DSL lines (NAT Router), Public IP Address over DSL lines, Corporate Networks over dedicated Links (Public
<br>and IP Addresses), Dialup links, ...... <br>Any comment would be welcomed,<br>thanks a lot<br><br>Levy.-<br><br>
<div><span class="gmail_quote">2007/3/24, A. Levy <<a href="mailto:ardielle@gmail.com">ardielle@gmail.com</a>>:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>Hello.</div>
<div> </div>
<div>I have a TE405P Digium Card (4 E1's) with ISDN protocol and I need to find out if there is any limitation about DSP capabilities, I mean, I am not sure how many phone calls my Digium card supports, simultaneously. The calling flow goes from IAX <-> ISDN.
<br> </div>
<div>I am running this card into CPU like this:</div>
<div>- Micro PIV 3.0 </div>
<div>- 1Gbyte Memory</div>
<div> </div>
<div> </div>
<div>Thanks.</div><span class="sg">
<div> </div>
<div>Levy.-<br> </div></span></blockquote></div><br>