Similar to a Cisco system, but a lot easier to implement. That's a big key - you don't have to have a Cisco guy to maintain the system. A lot of it's the same functionality-wise, just easier access for everyday usage & management. If Cisco is Linux, then Shoretel is Mac. I mean, if you need to deploy like 50 phones with a mix of DID's & extension-only all of a sudden, you can easily do it in an afternoon. It's a cinch!
The core idea is IP phones, which can be hardware, software, or a mix of both. So you can have a desk phone. Or a software phone with a Bluetooth headset from your computer. Or an app on your smartphone. Or you can load the software on your computer and have it dial your desktop. Or forward to your 3G cell phone. Or use an iPhone or iPad on a desk phone dock. Basically just have access everywhere, in whatever way you want it. You can have a Wifi phone, or a DECT phone, or even an analog phone if the environment calls for something cheap & easily replaceable.
A lot of the functionality obviously overlaps Cisco & other PBX vendors, I just happen to like how easy it is to implement & maintain. The server software controls administration & voicemail storage, then you just drop a voice switch in for every X number of phones. Super easy to VPN phones into a HQ site from branch sites. They have IM software. You can plug it into stuff like Salesforce. All kinds of stuff. Basically, imagine if Skype made a PBX...the core IP communication kind of goes everywhere & spreads into smartphones, computers, and physical phones, rather than just an "IP phone + Server" plus some additional functionality. I still like Cisco for reliability, but other vendors like Shoretel have brought some serious game!
It's interesting how competitors are creeping up on the big names & how they're getting consolidated. Dell has had some interesting collaborations with Aruba, which offers some pretty nice wireless systems (
toast, anyone?). Extreme Networks acquired Enterasys, which makes pretty awesome networking gear. Logitech acquired Lifesize, which makes a pretty killer HD video conferencing system. Dell has actually been on fire lately...Sonicwall, Wyse, etc. I think they'll be a major player in coming years in all aspects of corporate IT. Anyway, enough about all that. There's some neat stuff out there