RS-232 Cable Specs and Modem Use B - 3
Modem Use
The Ethernet Management Module enables you to use a dial-in modem.
The requirements are as follows:
1. The modem must be 100% Hayes compatib le.
2. Any baud rate in the rang e (300, 1200, 2400, 9600) may be used.
Higher rates are preferred.
3. The modem must be placed in Dumb/Auto Answer mod e. This is
accomplished by entering the following commands from a terminal
directly connected to the modem:
at& [ENTER] . . Restore factory defaults
at&d0 [ENTER] . Ignore changes in DTR status
ats0=1 [ENTER] . Auto-answer on first ring
ats0? [ENTER] . . Verify auto-answer (should return 001)
atq1 [ENTER] . . Does no t return result codes
at&W [ENTER] . . Save this configuration
at&Y[ENTER] . . Define this configuration as default
Note: * If you issue the SET TERMINAL HANGUP ENABLE
command for modem use, you must change the DTR
parameter as defined below to ensure proper modem
operation.
*) at&d2 [ENTER] . Indicates hangup and assumes command
.........state when an On to Off transition of
.........DTR occurs
If necessary, follow the commands in your modem user manual to place t he
modem into dumb mode (command recognition disabled).