We are a Shoretel dealer, it has some short cummings. The Mitel Voip system is much more powerful, it will and can do anything.
The shoretel in my opinion is a basic VOIP system.
The main problem of shoretel is, it is only as reliable as the windows operating system it is running on. suseptable to virus's and everything a windows based product can get.
Mitel is linux based, very stable.
The shortel teleworker phones work like ****.
Mitels, with no VPN they sound awesome.
Mitel is more expesive to maintain because of the complexity.
Shortel is very easy to maintain and IT guys will love it, If you want a basic VOIP system and you want to maintain it yourself. I think it is a good choice.
This is the only advantage of the shoretel system over another product
Editted for language content.
