A customer requests to have the securitysystem monitored through the phone line
to a central office.
Which of the following types of interfaces should be used to connect the security system
to the plain old telephone system (POTS) phone line and give transmission priority to the
security system?
A.
RJ-11
B.
RJ-31X
C.
RS-232
D.
RS-422
Explanation:
The RJ-31X jack is designed to seize the line and made specifically for securtiy systems.
Not A: RJ-11 is not correct. It is a standard phoe jack and is not capable of
seizing the line.