Check the Microswitch Setting on the Modem
Check the microswitch settings on the modem. The settings should be set as follows:
Switch
Position
Function
1
Up
Force DTR
2
Up
Flow Control &E4
3
Down
Result Codes Enabled
4
Up
Modem Emulation Disabled
5
*Down
Auto Answer Enabled
6
Up
Maximum Throughput Enabled
7
Up
RTS Normal Functions
8
Down
Enable Command Mode
9
Down
Remote Digital Loopback Test Enabled
10
Up
Dial-Up Line Enabled
11
Down
AT Responses Enabled (Extended
Responses Disabled)
12
*Down
Asynchronous Operation
13
UP
28.8KB Line Speed
14
Up
15
Up
CD and DSR Normal Functions
16
Up
2-Wire Leased Line Enabled
Note:
* Only switches 5 and 12 are changed from the factory default settings.
Appendix E. Install a HMC
591
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