Hi, I have an odd issue in our office. Just confirmed today but, myself and staff have noticed that sporadically when I try to call a number via PSTN we will not hear any ringback or any audio once the call is connected. I tested this a couple of times to my cell phone. The call is made and I do not hear any call back, and my cell phone rings, I answer my cell phone but, neither I can hear my office phone nor can I hear anything on my cell phone.
This is sporadic, it will happen once and a few hours later after several successful calls it will happen again. We are also experiencing a similar issue when we transfer calls thourgh the PSTN. If I try to transfer a call to a cell phone the call seems to transfer but, the transferee never gets to the destination just seems to stay on hold. We have also noticed several times calls coming in our main DID and we hear nothing. It looks like this has been happening for several days however, its so sporadic its just now coming out.
I've read a couple of doc's about enabling IP routing, Binding the H.323 Signaling to a Specific IP Address, and other standard configuration issues however, this is not a new install we have had this router and config for about three years and nothing has changed at least within the last year.
I kinda think that maybe its a DSP issue but, I'm curious on other peopels thoughts. Here are the specs.
Cisco 2821 H323 Gateway with PRI running IOS c2800nm-ipvoicek9-mz.124-24.T2.bin.
Cisco Unified Communications Manager System version: 18.104.22.1680-13