Digium, Inc.
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Chapter 3: Telephone System Configuration
Advanced Analog Options
There are also some advanced settings which are applied to your analog
hardware. Specify them as needed, or accept the default values.
Opermode - Setting operation mode, or Opermode, sets the On Hook
Speed, Ringer Impedance, Ringer Threshold, Current limiting, Tip/
Ring voltage adjustment, Minimum Operational Loop current, and and
AC Impedance selection as predefined for each countries analog line
characteristics. Select the country in which your Asterisk Appliance
50 is operating.
A-law Override - Set the audio compression scheme. The setting you
choose is dependent on the country of operation. Ulaw is used in the
United States and Canada. A-law is used in most other countries. If
possible confirm the scheme which will be best for operation of your
Asterisk Appliance 50.
FXS Honor Mode - This setting lets you choose whether you apply
the opermode setting to your FXO modules only, or to both FXS and
FXO modules.
Boostringer - Set the voltage used for ringing an analog phone. Nor-
mal will set ring voltage to a normal level, or Peak will set the voltage
to 89v.
Fast Ringer - The fast ringer tone can be set to normal, or to a 25hz
tone.
Lowpower - The low power setting can be set to normal, or to a Fast
Ringer peak of 50v.
Ring Detect - Users who are experiencing trouble detecting Caller ID
from Analog service providers or whose lines exhibit a polarity rever-
sal before Caller ID is transmitted from the provider should select Full
Wave. Otherwise, choose Standard.
