<div>Dear All,</div>
<div> </div>
<div>Here is my lab environment:</div>
<div> </div>
<div> MGCP GW ===== PSTN<br> |<br> ---------------------------------------------------------<br> | | |<br> IP Phone CCM 4.x IP-IVR(DN:1234)
</div>
<div> </div>
<div>(ps. MGCP using T1 PRI to PSTN, CCM using SIP trunk to connect to IVR server)</div>
<div> </div>
<div> </div>
<div>When I use IP Phone to dial DN (1234), CCM will route the call to IP-IVR via SIP trunk, and then user can follow the voice prompt to enter password and outisde phone number. If the password authentication passed, the outside number will be forwarded to CCM and then routed to MGCP GW. The normal call process is working just fine.
</div>
<div> </div>
<div>Now we want to have another voice prompt when the calling number is busy, but it can't work as expected. When busy tone comes out, I see no signal passed back to CCM and IVR server. It will take about 1 - 2 mins and then IVR display message "486". Is the problem in GW or CCM? Is it possible that I can make the busy signal passed to CCM/IVR as soon as possible? Thanks a lot for your comment.
</div>
<div> </div>
<div>Regards,</div>
<div>Alan</div>