Connect Modem to Telephone Network
Issue 10 June 2005 147
External Modem Option Settings
The U.S. Robotics Sportster Model USR 33.6 EXT external modem is the recommended
external modem. A locally obtained, type-approved external modem may be used. Contact your
Avaya Inc. representative for information.
To set the options on the external modem:
1. If a non-U.S Robotics Model 839 modem is installed, refer to the setup instructions provided
with that modem. Refer to Table 29: Modem Fields
on page 148 while setting up the
modem. Go to Step 4 to complete the modem administration.
2. If no modem is installed, skip to step 5. If a U.S Robotics Model 839 modem is installed,
perform the following.
3. Use Table 28
to set the 8 option switches on the U.S. Robotics modem
4. Type change system-parameters maintenance and press Enter. Scroll to page 3 of the
form.
Table 28: U.S. Robotics Model 839 External Modem Dip Switch Settings
Dip
Switch
Setting Description
1 UP
DOWN
Data Terminal Ready normal
Data Terminal Ready override
2 UP
DOWN
Verbal result codes
Numeric result codes
3UP
DOWN
Suppress result codes
Display result codes
4 UP
DOWN
Echo offline commands
No echo, offline commands
5 UP
DOWN
Auto answer on first ring or higher if specified in NVRAM
Auto answer off
6 UP
DOWN
Carrier detect normal
Carrier detect override
7 UP
DOWN
Load NVRAM defaults
Load factory defaults
8UP
DOWN
Dumb mode
Smart mode
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