Your Tely system is interoperable with Easymeeting as long as the system you have supports SIP, some basic models only support Skype.
Models that support SIP:
Tely HD Pro
You can upgrade your TelyHD to the TelyHD Pro and add the functions of TelyHD Pro to a TelyHD Base edition. It is available through authorized resellers and on the Tely Labs website at http://www.tely.com/store-us/
If you are still unable to connect by dialing EasyConference@easymeeting.net, please check your firewall and network settings.