High Speed Broadband is Essential
As with hosted systems, the broadband connection to the customer site needs to have sufficient bandwidth to handle the calls.
This can limit the number of phones that be deployed to a site; especially if the customer is making the voice traffic share the broadband service with other Internet traffic ñ this is an ìOver the Topî (OTT) type solution.
The main drawback with cloud based telephony is that the number of features provided is generally far lower than that provided by hosted or on-premises systems.
The reason for this is that cloud based systems must cater for a large number of customers and supporting customised features is difficult to implement and manage in that situation.