Do Telco can provide OTT service? Most of them can’t. Not
because they technically not capable, even their capability block them to
deliver OTT service. Why is that ?
This is the answer, summary of the article from wikipedia
The term OTT or "over-the-top" refers to the
delivery of content or services over an infrastructure that is not under the
administrative control of the content or service provider. Originally it
referred to the delivery of audio and video content, but more recently the
definition has been extended to include any service or content and in a more
general sense means any service available on the Internet.
Recently, over-the-top is wrongly used in the telecom world
to describe any unmanaged service delivered over IP. If an operator offers an
IP service (say IPTV), and that service is delivered over the operator's
infrastructure (whether mobile, fixed, or otherwise), it is not OTT. If that
same operator, after building a content/service model, extends the service to
any IP end point on another operator's network, then it becomes OTT. Whether
the operator decides to use QoS for the service is irrelevant in the definition
of OTT. In other words, an operator offering a service to its own subscribers is
never OTT; rather if quality and bandwidth are enforced, it is a managed telco
service, and if not, it is an unmanaged telco service. Only if it is extended
beyond the boundaries of that telco's infrastructure is it ever correctly
referred to as OTT.