TLS-3B User’s Manual
40-400-00032, Rev. B
2
Figure 1. TLS Front and Rear Panels
Status Lights
When a telephone (or other device) connected to one of the Line connectors is off
hook, the corresponding Line indicator lights (see Table 1). The Line light dims (not
totally dark) when the TLS-3B 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.
Table 1. LED Indicators
Indicator State
Description
On
Line is off-hook.
Flashing (fast on/off)
Line is ringing.
Blinking (slow on/off)
Programming mode: Line is
selected for programming.
Half brightness
During dialing, indicates that a
valid DTMF digit is present.
Line 1/Line 2
Dim blinking between rings
Caller ID is being sent to the
called phone number.
Single blink
Setup 1
Power
Double blink
Setup 2
When the TLS-3B 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 (blink) when
the TLS-3B is operating. A single blink indicates Setup 1. A double blink indicates
Setup 2. For information about programming different setups, see “Programming the
TLS-3B” on page 8.
