Marcham, P. <br/><br/>
Data transmission via PABXs 
P. Marcham 
 - Manchester  NCC  1984 
 - 66 p.  ill.  22cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems<br/>Telephone, Automatic<br/>Telephone--Private branch exchanges
<br/><br/><label>Dewey Class. No.: </label>001.64