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The T-51A is a three line,
telephone line switch. This unit allows up to three standard telephone company lines
(more lines when used in tandem with other T-51A's) to use a single Telecommunication
Device. The T-51A has three RJ-13 telephone cables that you can connect to either,
three single line, RJ-11 telephone lines, or to three RJ-13 telephone lines as used on 1A2
or COMKEY Telephone Systems (in these cases, the T-51A will provide lamp control to
indicate when it is on line). When a call rings into any of the three lines, the
T-51A routes that line to the Telecommunication Device. As soon as the
Telecommunication Device answers the call, the T-51A will place a "BUSY" across
the other two lines (BUSY OUT can be disabled if desired). |
 
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Any other customers that call in, while
the Telecommunication Device is in use, will get a "BUSY" signal; this helps
assure your customers that their call is important because they don't just get a
ring-no-answer. As soon as the Telecommunication Device is finished, the T-51A will
remove the "BUSY" condition from the other lines and then wait for the next
call. Whenever you need to place an outgoing call, the T-51A will automatically
connect you to Line 1. Typical applications include connection to an after-hours
order processing device, Voice Message system or a fax machine.
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