Setup
Installation
1 Provide Power
The ADDCOM A10L may be operated from a variety of power sources:
• Internal batteries
• External DC Plug-Pack
• Telephone handset power (Carbon-microphone phones only)
INTERNAL BATTERY OPERATION
Open the battery compartment and insert two alkaline AA batteries. Check the battery polarity
carefully during installation!
You can check that your batteries are fresh and correctly inserted, because the MUTE LED will light
brightly when you press the MUTE button. New alkaline AA batteries will typically provide several
months’ operation, even with heavy use.
When the batteries are exhausted, the MUTE LED will become dim. Remove exhausted batteries to
avoid battery leaks!
WARNING: Disconnect the A10L from the telephone at the Telephone socket before replacing the
batteries, for protection from potentially hazardous voltages on the telephone circuits.
EXTERNAL DC PLUG-PACK OPERATION
Use only the ADDCOM plug-pack designed for the A10L.
Connect the DC plug-pack’s output to the DC 9V socket.
Batteries are not required when the A10L is operated from a plug-pack.
TELEPHONE HANDSET “CARBON MICROPHONE” POWER
Some telephones will supply sufficient power through their handset connection to operate the
A10L.
If you find that your amplifier operates correctly with the “A-B” switch in position “B” (while
performing the adjustments in Section 3), then you will not require batteries or the plug-pack.
The telephone will provide power to your amplifier.
