There are a lot of network/systems admins that have to put on the telecom admin hat as well. Either using Cisco Call Manager, Asterisk, other VOIP/digital/analog PBXs, digital/analog systems, wireless phones used in a PBX, voicemail systems, etc. The world is typically foreign to them overall, only over the last 5-10 years intermingling forcibly with the networking side, causing them to have to support it, especially in SMBs where the need for a full-time Telecom Admin isn't necessary.
However, there seems to be a lack of experts here on SF and there isn't a site dedicated to Telecom on StackExchange.
The ServerFault FAQ is defined as:
If your question is about…
Server and Business Workstation operating systems, hardware, software and virtualization Enterprise storage, backup, and disaster recovery Network routing, switches, and firewalls Operations, maintenance, and monitoring
I searched for "telecom" in SF Meta and SO Meta and didn't find much to go off of.
I did see a proposal on Area 51 for Telecom here: http://area51.stackexchange.com/proposals/40212/telecommunications
and I also saw someone proposing that the Telecom beta site be merged with the Networking Engineering beta site here: https://area51.meta.stackexchange.com/questions/9754/merge-with-network-engineering
The problem is that telecom, like a lot of technology fields, doesn't fit neatly into a single box...either Network Engineering or Server Administration. But giving it its own site clearly isn't getting anywhere on Area 51.
On Server fault there are example questions like:
etc...all valid questions with typically little to no answers or the OP coming back and answering based on other research.
It seems as though there isn't a good fit in general here on the SE sites for these questions according to the examples above. They aren't bad questions, they simply get passed over, probably because telecom admins aren't hanging out in SF.
SF at this point seems to still be the only choice, albeit lacking,to ask the questions, but are those of us that do have to support on-premise VOIP, PBXs, etc. forced to look elsewhere for our answers or is there a way to bring this knowledge and expertise into SF? Should the FAQs mention telecom administration anywhere in them? Would the # of telecom administration questions even warrant anyone caring or is it just a small percentage that those of us that do need that kind of support can simply look to the vendor or other online resources?