GAI-Tronics LE200, LE200-FSR, LE200-FLR Page/Party Line Extenders - Manual (Page 42)

Pub. 42004-701L2F
M ODEL LE200 S ERIES W ALL -M OUNT P AGE /P ARTY
®
L INE E XTENDERS P AGE 40 of 50
f:\standard ioms - current release\42004 instr. manuals\42004-701l2f.doc
04/09
Frequently Asked Questions
Q: Why does it take so long for the propagation of off-hook to on-hook transitions?
A: The line balance ac coupling capacitors take some time to charge. Also, the delay helps to prevent
audio from looking like an on-hook condition.
Q: Why does it take so long for the propagation of the page line ground fault transitions?
A: If the delay was not there, then page line audio might appear to be a ground fault.
Q: I am upgrading an LE100 to an LE200, and am using a CAT 3 cable connection. Do I need to replace
the CAT 3 cable with CAT 5 cable?
A: No.
Q: Why is shielded cable specified for the LVDS cable?
A: To improve the link’s noise immunity. Most likely, the clock signal that controls one of the LE200s
passes over the LVDS cable.
Q: Is the LE200 compatible with the public switched telephone network?
A: No.
Q: Does the LE200 have on-board primary protection for the T1/E1 cable?
A: No.
Q: Why is the LE200 not compatible with the public switched telephone network?
A: (1) It is not approved for such use. (2) At a minimum, it does not support the facility data link
transmission required for such use.
Q: What does LVDS stand for?
A: Low Voltage Differential Signaling
Q: Can I connect a Model LE200 to an LE100?
A: The T1 connection cannot be used to connect an LE200 to an LE100. However, an analog connection
can be used, i.e., an LE200 and an LE100 can both connect to the same system cable.
Q: Can I have Model LE100 and LE200 Line Extenders in the same system?
A.: Yes, but the LE100s must be connected to other LE100s and the LE200s must be connected to
LE200s.
Q: What happens if the line balance is not installed?
A: A loud oscillation is heard on the audio line.