2. Copy the /usr/share/modems/modem_f.cfg file to a new file with a different name(for example modem_fx.cfg).3. In the new file (modem_fx.cfg), change the line Send "ATE0T\r" to Send"ATcccE0T\r" where ccc is the added command as specified your modem manual,as follows:Change the third line of each of the following stanzas:v condoutv condinv ripo4. Save the changes.IBM 7852-400 DIP Switch SettingsIf you are using a 7852-400 modem to enable service processor communications, theDIP (dual inline package) switches must be set according to the following table.Switch Position Function1 Up Force DTR2 Up Flow Control &E43 Down Result Codes Enabled4 Down Modem Emulation Disabled5 Up Auto Answer Enabled6 Up Maximum Throughput Enabled7 Up RTS Normal Functions8 Down Enable Command Mode9 Down Remote Digital Loopback Test Enabled10 Up Dial-Up Line Enabled11 *Up AT Responses Enabled (Extended Responses Disabled)12 *Down Asynchronous Operation13 Up 28.8KB Line Speed14 Up15 Up CD and DSR Normal Functions16 Up 2-Wire Leased Line Enabled* Only switches 11 and 12 are changed from the factory default settings.Xon/Xoff ModemsSome early modems assume software flow control (Xon/Xoff) between the computerand the modem. Modems with this design send extra characters during and after thetransmitted data. The service processor cannot accept these extra characters. If yourconfiguration includes such a modem, your functional results may be unpredictable.The sample modem configuration files included in this package do not support thesemodems, so custom configuration files are necessary. The Anchor Automation 2400E isan example of such a modem.Iif you experience unexplainable performance problems that may be due to Xon/Xoffcharacters, it is recommended that you upgrade your modem.296 Service Guide
