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From: kthompso@entec.wichita.ncr.com (Ken Thompson)
Newsgroups: comp.dcom.telecom
Subject: 7400 Series "Voice Terminals"
Message-ID: <16009@accuvax.nwu.edu>
Date: 11 Jan 91 20:55:23 GMT
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X-Telecom-Digest: Volume 11, Issue 28, Message 12 of 12


A technical question for the net:

My current phoneset(2500) will soon be replaced by a digital unit
(7401).  There is curiousity about the 7400 series receivers.  Is the
speaker low impedance just as in the 2500?  The transmiter cannot be
carbon type.  It is too small.  Is it a simple mike or an electret
(sp?)  that requires a small, current limited bias voltage to operate
properly?
 

Ken Thompson     N0ITL     NCR Corp.  3718 N. Rock Road            
Wichita,Ks. 67226  (316) 636-8783   Ken.Thompson@wichita.ncr.com