Pub. 42004-735L2D
M
ODEL
LE300
S
ERIES
W
ALL
-M
OUNT
P
AGE
/P
ARTY
®
L
INE
E
XTENDERS
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Table 23. LVDS “OUT” Setting on Main PCBA
SW3-4
Enable/Disable LVDS “OUT” Port
Open*
LVDS “out” is disabled.
Closed
LVDS “out” is enabled.
N
OTES
:
1. Changes to this parameter take effect without cycling power.
2. *Indicates default position.
NOTE
Do not connect LVDS “in” to LVDS “out” on the same Model LE300. Doing so
creates a feedback path that usually results in (extremely loud) oscillations on the page line, all party lines,
and possibly the contact outputs.
LVDS Port Indicators
Each LVDS port has two LEDs. The green LED is ON when the LE300 detects a signal connection from
the other LE300 connected to that port. The yellow/orange LED is ON when the LE300 detects page line
data (SmartSeries FSK or 50 kHz VLC) on the LVDS port.
Typical Data Link Settings
The following section shows the most common line extender connection schemes and the expected T1/E1
and LVDS data line parameters for each. Consult the applicable tables above to determine the correct
switch settings. Consult GAI-Tronics for technical support of connection schemes not shown in this
manual.
Point-to-Point Page/Party
®
System Connection
Figure 8. Point-to-Point Page/Party® System Connection
Table 24. Point-to-Point Page/Party® System Connection Table
Parameter Switch
Configuration
Description
T1 Line Length
SW2
Determined by installation distance between LE300s.
T1/E1 Clock Source
SW3-1
SW3-2
Unit A is the master clock source:
SW3-1 (open) SW3-2 (open)
Unit B is the slave and uses the T1/E1 clock from Unit A:
SW3-1 (closed) SW3-2 (closed)
LVDS Clock Source
SW3-3
SW3-4
Not used – disable both LVDS “in” and “LVDS out”:
SW3-3 (open) SW3-4 (open)