Now we are seeing "no channels available" when trying to make outgoing calls - not all the time, just some of the time.

Kirk, this intermittent problem is most likely NOT a Samsung issue.  I can understand the reluctance to replace such a large system but you really need to be considering just that!  Samsung has been out of the key system business for 3 years now, which makes dealers harder to find. History shows the systems with the larges amount of phones usually experiences premature power supply failures leaving you with a completely failed system. If you can't get someone on site now, think of what that may be like! I know you are a CPA and most likely have this investment spread out for tax purposes.  You should (in my opinion) talk with Ken (hitechcomm)   about what he can do for you.

I don't have a Samsung Tech in my network of resources at the moment and I realize I am beyond my abilities to troubleshoot this problem. If you know of anyone who is a Samsung Tech and would be willing to consult on this case, please let me know.

If you let me know which of your locations is having the issue, I may be able to get you on site help

Thanks for the reply. Now we are seeing "no channels available" when trying to make outgoing calls - not all the time, just some of the time.  Our ISP is monitoring the PRI line incoming and have fixed a couple of different issues they saw with their lines.  I don't have a Samsung Tech in my network of resources at the moment and I realize I am beyond my abilities to troubleshoot this problem. If you know of anyone who is a Samsung Tech and would be willing to consult on this case, please let me know.  Otherwise I will continue with my plan to replace this current system with one that is easier to support. Thanks again.   

I use the free version of Dropbox.  Still not secure, but it's super easy.

As you all know, I'm a phone man, not a CG, so bear with me.  I needed to send a large program file to a coworker who was in the field.  I tried to send it from my Outlook account to his and it got rejected due to size.  It was 41Mb, even zipped.  He suggested that I use a pretty cool utility that allows file sizes up to 2 Gig using their free version, or they have a paid version that lets you send much more.

You enter your e-mail address and theirs, then attach the file to their form.  It sends them a link that is marked as from you which allows them to download it without issues.

The service is www.WeTransfer.com . I'm sure that many of you are already aware of these types of services.  I am posting this for maybe that occasional person like me who may come here seeking help.

"Plug-Out" is what you get when trying to reach a station which is part of the system but the hardware is not seen.  You have too many variables to try to determine this here. The Samsung tech would need to know the entire configuration of the OS7400 as well as the network switches you are using and if you are using POE or wall warts for the IP phones.