Robert Von Borstel <vonb@iitmax.iit.edu> (08/06/90)
I've looked at the "Hello Direct" catalog and it seems more
consumer-oriented, rather than technician-oriented. We would like to
get a good set of rj11 crimpers and related supplies. Is there a
telco supplier that someone can recommend that carries stuff like
this.
Also having a 1A2 multi-key phone set on my desk, I would really like
to add a speakerphone. A new one costs an exorbinent $$$$ amount of
money from Ill. Bell, so are there any used telco vendors that supply
said equipment that I can contact? We are a Centrex site served by
Ill. Bell, all of this equipment is analog.
And am I correct that even if I find said speakerphone, it's really
not a full duplex type? ie there's a split second where it switches
from send/receive. I know this is old stuff, maybe the new stuff
(merlin/digital) doesn't do it.
Robert Von Borstel / Illinois Institute of Technology - ACC
10 West 31st Street, Chicago, Il 60616 (312) 567-5962
INTERNET: vonb@iitmax.iit.edu BITNET: sysbvb@iitvax John Higdon <john@bovine.ati.com> (08/07/90)
Robert Von Borstel <vonb@iitmax.iit.edu> writes: > And am I correct that even if I find said speakerphone, it's really > not a full duplex type? ie there's a split second where it switches > from send/receive. I know this is old stuff, maybe the new stuff > (merlin/digital) doesn't do it. While there exist full duplex speakerphones (I have one at the office), they are very uncommon and really don't work as well as the standard switched gain variety. The reason for this is a law of physics. Even if the unit has remarkably good trans-hybrid loss, there exists a feedback path from the speaker to the microphone. What happens on my unit is if there is any abrupt change on the line, such as a call-wait or the caller hanging up, there is an ear-shattering howl. The switched gain speakerphones do not have this problem at all and are totally non-critical concerning speaker placement. The better systems of this type switch directions almost instantaneously and are easy to talk over (my Panasonic phones seem fine). The worst ones chop off words, or become confused and prevent one party from hearing the other at all. Buying a speakerphone is a lot like buying a car. You really should test drive it before you buy it. John Higdon | P. O. Box 7648 | +1 408 723 1395 john@bovine.ati.com | San Jose, CA 95150 | M o o !