Hi,
I work for Talkswitch. So perhaps a bit biased but,
Depends on the model of ShoreTel phone I would be able to tell you how they work with Talkswitch. Generally speaking Talkswitch is a fully analog system and will work with any analog phone.
As for support... Just cause we are in Canada, there isnt much difference... except temperature
Support Hours of Operation:
Monday to Friday, 9:00 am to 5:00 pm EST
Available at 1 866 393 9960... Email is also available for not so urgent requests.