Alpha Telecom UTA120, User Manual

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Chapter 1: Introduction
UTA120 User’s Guide
3
7. Insert the other end of the AC/DC power adapter into the wall socket.
8. Check the Termination resistance setting. You may need to adjust the termination
resistor if your UTA120 is connected to any other ISDN terminal equipment,
especially ISDN phones. Position DIP switches 7 and 8 on the rear panel to set
the termination resistance. Refer to Table 1.1 for the appropriate DIP Switch
settings. In most cases, the default setting is 100
Ω
.
9. Please check the LED (Light Emitting Diode) indicators when you turn the power
switch ON. All the LEDs should flash in a preset sequence for a few seconds. If
nothing is plugged into the UTA120 then the LED indicators will stop flashing and
only the green Power LED and the red Line LED will be lit. If everything is
connected, the Line LED will turn green. For a complete description of the States
of the LED indicators, see Table 1.2.
Bit 1 Remote Configuration ON: enable OFF: disable
Bit 2 Local Loopback ON: enable OFF: disable
Bit 3 Reserved
Bit 4 Reserved
Bit 5 Reserved
Bit 6 Forced Software
Download
ON: enable OFF: disable
Bit7
Bit8
S/T Termination
Resistor Selector
Bit 7&8 ON:
100
Ω
Bit 7&8 OFF: None
Table 1.1: Dip Switch Settings
GREEN RED YELLOW FLASHING SOLID
Power
ON
Line U-Interface activated U-Interface
deactivated
TEL1 Active In Progress Connected
TEL2
Active In Progress Connected
Data
1 B channel
Connection
2 B channel
Connection
DTE
connecting
DTE
connected
TD
Transmitting data
RD Receiving data
DTR
Data terminal ready
TEST
ON
Table 1.2: States of the LED Indicators