8-6 EIA RS-232 Cabling
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The modems used for switched RS-232 networking may be one of the following modems that can run
Microcom Networking Protocol (19.2 MNP) or non-MNP modes. The non-MNP modes will have a fixed
rate of 9600 bps. To confirm a modem version, connect a 9600 bps terminal to the modem and enter one of
the Hayes commands listed below (the result is listed below the command in each case).
• For an AT&T 2296A, enter the following:
— ATI0 ATI0 RETURN
ID:961
— ATI1 ATI1 RETURN
version:243
— ATI2 ATI2 RETURN
checksum:OK
All 2296A modems must have at least a 140C memory module.
• For an AT&T Paradyne 3820, enter the following:
— ATI0 ATI0 RETURN
ID:144
— ATI1 ATI1 RETURN
version:212
— ATI2 ATI2 RETURN
checksum:OK
• For an AT&T Paradyne DM424, enter the following:
— ATI0 ATI0 RETURN
ID:960
— ATI1 ATI1 RETURN
version:0626/0403
— ATI2 ATI2 RETURN
checksum:0454
• For a MICROCOM QX 3296/C, enter the following:
— ATI0 ATI0 RETURN
ID:960
— ATI1 ATI1 RETURN
version:010f1
— ATI2 ATI2 RETURN
checksum:OK
