<div dir="ltr"><div class="gmail_quote">On Tue, Jul 19, 2011 at 3:46 PM, Matthew J. Roth <span dir="ltr"><<a href="mailto:mroth@imminc.com">mroth@imminc.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="font-family: Times New Roman; font-size: 12pt; color: rgb(0, 0, 0);">Michael,<br><br>Here are the differences between the systems that I determined from the two SIP traces:<br><br>* Working system: no NAT, phone codec: G.729, Asterisk codec: G.729<br>
* Non-working system: NAT, phone codec: G.729, Asterisk codec: A-law<br></div></div></blockquote><div><br>True. In the working system, LAN calls are also using G.729, while in the non-working system, LAN calls are in G.711 (supported but not prioritized by the phones) and only the SIP trunk to the ITSP is set to G.729. <br>
</div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div style="font-family: Times New Roman; font-size: 12pt; color: rgb(0, 0, 0);">
<br>Does the conversation have two-way audio prior to the hold? If it doesn't, your problem may be caused by NAT and/or codec transcoding.</div></div></blockquote><div>Thr call is fine prior to the HOLD. <br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="font-family: Times New Roman; font-size: 12pt; color: rgb(0, 0, 0);">NAT is notorious for causing one-way audio and transcoding G.729 requires a commercial license from Digium.<br></div></div></blockquote>
<div>G.729 licenses have been purchased from Digium and installed. We tested with NAT set to "no" and "yes" and neither settings mattered.<br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div><div style="font-family: Times New Roman; font-size: 12pt; color: rgb(0, 0, 0);"><br>After those two possible causes are ruled out, the only other thing that I can think of is a missing format translation path for the music-on-hold files. Does the AsteriskNOW system have modules loaded for both formats?</div>
</div></blockquote><div>It should. How do we check this? <br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div><div style="font-family: Times New Roman; font-size: 12pt; color: rgb(0, 0, 0);">
I don't use either format, but I believe the required modules are "format_g729.so" and "format_pcm.so".<br></div></div></blockquote><div>Thanks. <br></div></div></div>