I am pretty confident that this does not have to do with CallManager (6.1.4, MGCP PRI GWs with lots o' DIDs), but I am wondering if someone might help me put together a method for approaching the issue...<br><br>Sporadically, for what seems like about a minute at a time, some callers to our DIDs (mostly cellular callers) report getting a network message that the call cannot be completed, or for Verizon Wireless callers, "the Verizon Wireless customer you called is not available at this time." My personal experience is that I retry 2-4 times, and end up getting through. It doesn't happen often, but does seem to occur as things are starting to get busy on the trunks. That said, I never see blocking on the trunks when I monitor using RTMT, even though utilization is fairly high.<br>
<br>The DIDs are on a trunk group of 5 Verizon PRIs, and in 2008, were ported by Verizon to a different CO when headquarters moved a few miles down the road.<br><br>Any ideas for things I should look at/for? Should I be calling Verizon, or any of the cell carriers on which the issue was reported?<br>
<br>Thanks for any suggestions you might offer!<br clear="all"><br>-- <br>Dave Wolgast<br>Livonia, NY<br>