The  global telecommunications industry and its associated networks are
undergoing preparations for massive changes in the next decade to provide 
faster and more reliable services, especially for  
video and data traffic.
These Integrated Services Digital Networks (ISDN) 
 will also depend upon the provision of many different
forms of service, including the ability to have more than one
destination in a connection {\em (multicast)}.
This paper presents the design and performance studies of a small-scale
communications switch which can provide such a multicast service. 
It has been found to be simple to implement and
offers a performance comparable with more complex designs.