4
40-400-00010, Rev. B
1. Connectors and Lights
The front panel of the TLS-3A has two telephone line jacks, with a
green status indicator light for each line, and a green Power indicator
light. The power input connector is on the rear panel.
Status Lights
When a telephone (or other device) connected to one of the Line
connectors is off-hook, the corresponding Line indicator lights. The Line
light dims (not totally dark) when the TLS-3A decodes valid DTMF from
the off-hook device. If the off-hook device sends rotary dialing signals,
the line indicator will flicker on and off during dialing.
When the TLS-3A sends a ringing signal to a telephone attached to one
of the Line connectors, the corresponding Line indicator flickers on and
off rapidly.
The green Power indicator alternates between full and half brightness
when the TLS-3A is operating. If the Power indicator is dark, no power
is connected to the TLS-3A. If it lights, but does not flicker, the TLS-3A’s
internal processor is not working properly.
Line Jacks
Two Line connectors (RJ-11 modular telephone jacks) are located on
the front panel. These connectors mate with the plugs on standard
modular telephone cords.
Power Connector
The power connector requires a 24-volt DC power source. A 120 VAC
24-volt DC power pack is supplied with the TLS-3A. Do not use the
TLS-3A with a power pack that supplies a different voltage.
Figure 1
TLS-3A Front and Rear Panels
