Integrated services digital network (ISDN)  [videorecording] 

 - Piscataway, N.J. :  Bell Communications Research,  1992 
 - 1 videocassette (VHS) (28 min.) :  sd., col. ;  1/2 in. + 1 viewer's guide 
 - New transport technology series [videorecording] .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Integrated services digital networks