3Com 5101M-MGT installation and operation guide Modem Use, Auto-answer on first ring

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 compatible.

2.Any baud rate in the range (300, 1200, 2400, 9600) may be used. Higher rates are preferred.

3.The modem must be placed in Dumb/Auto Answer mode. 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 not 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 the modem into dumb mode (command recognition disabled).

RS-232 Cable Specs and Modem Use B - 3