Micro Annex XL async port parameters with USR Sportster modem

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I have an old Xylogics Micro Annex XL sitting around and decided that
I would like to use it to add some RS232 devices to  my home network.
The first project that I decided to tackle was to hook up my USR
Sportster modem to spit out CallerID information.  In the past (when
PCs had serial ports) I used this modem for the same purpose and it
worked great.  In conjunction with the Annex, however, I am running
into some difficulties.

I have set up an Annex port (#2) in slave/hardwired mode, 9600 8N1.  I
am able to telnet to socket 5002 on the Annex and issue "AT" commands
to the modem and receive proper responses eg. "OK" from the modem.
However, with my telnet session open I am not seeing any result codes
from the modem: specifically "RING" and the CallerID data when a phone
call comes in.  If I unplug the modem from the Annex and connect it to
an ADM5 serial terminal (9600 8N1, FDX) the result codes are
displayed.  CTS & DTR lights on the modem show high both when the
telnet session is open through the Annex and when the modem is
connected to the ADM5.

It appears that something in the Annex port parameters is preventing
the modem from sending out the result codes when a phone call comes
in.  My guess it that it is a result of some sort of flow control
setting, but I am not sure which one.  If anyone has any experience
with this type of problem, I would appreciate a suggestion.


Following is a partial display of my port 2 settings:

Port 2:

            Port Generic Parameters

                mode: slave                        location:
                type: hardwired                    term_var:
              prompt: ""                              speed:
           data_bits: 8                           stop_bits:
              parity: none                max_session_count:
     allow_broadcast: N                 broadcast_direction:
         imask_7bits: N                          cli_imask7:
   ps_history_buffer: 0                              banner:

            Flow Control and Signal Parameters

       control_lines: none               input_flow_control:
    input_start_char: ^Q                    input_stop_char:
 output_flow_control: none                output_start_char:
    output_stop_char: ^S                  input_buffer_size:
 bidirectional_modem: N                  ixany_flow_control:
            need_dsr: N

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