Check the Microswitch Setting on the ModemCheck the microswitch settings on the modem. The settings should be set as follows:Switch Position Function1 Up Force DTR2 Up Flow Control &E43 Down Result Codes Enabled4 Up Modem Emulation Disabled5 *Down 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 Down AT Responses Enabled (ExtendedResponses Disabled)12 *Down Asynchronous Operation13 UP 28.8KB Line Speed14 Up15 Up CD and DSR Normal Functions16 Up 2-Wire Leased Line EnabledNote: * Only switches 5 and 12 are changed from the factory default settings.Appendix E. Install a HMC 423