Redmill, Felix, <br/><br/>
SPC digital telephone exchanger / 
F. J. Redmill and A. R. Valdar. 
 - London :  Peter Peregrinus,  1990. 
 - 497 pages :  illustration, ;  24 cm. 
<br/><br/><label>ISBN: </label>0863411479 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital telephone systems<br/>Telephone switching systems, Electronic