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Chapter 2: Installation September 25, 2006
2-8 LTPE-UM-3159-02
Step Action
1 Connect the shelf modem to the PC and verify that it is in working condition as described in the preceding
section, “Management Station External Modem.”
2 Use a communications program to send the following initialization string to the modem:
AT&F
This string resets the modem to its original factory configuration and clears any previous programming
that can conflict with the communication between the modem and the EMU.
3 Send the following configuration string to the modem:
ATE0Q1S0=1&K0Y0&W0
This string configures the modem to operate properly with the EMU. The commands in this configuration
string are as follows:
AT The command prefix indicating an AT command
E0 Do not echo input characters
Q1 Do not return result codes
S0=1 Answer the phone after the first ring
&K0 Disable flow control
Y0 Use profile 0 as the power-up configuration
&W0 Store current configuration as profile 0
Note: The shelf modem does not respond with an "OK" when you enter the above string. This
string disables all response codes and echo capability in the modem. The response codes
are not used by the EMU.
When the modem is properly configured, the Auto Answer (AA) lamp on the modem panel
lights, indicating that the modem is waiting for the phone to ring to answer an incoming call
from the management station PC.