Held, Gilbert. , <br/><br/>
Digital networking and T-carrier multiplexing / 
Gilbert Held. 
<br/><br/><label>ISBN: </label>0471928003 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems.<br/>Computer networks.<br/>Multiplexing.
<br/><br/><label>LC Class. No.: </label>TK5105   / .H44 1990