Comtech EF Data SNM-1000 - Manual (Page 39)

SNM-1000 Node Control Modem Revision 3
Installation MN/SNM1000.IOM
2–7
2.3.3 User Port
The User Port provides for serial communications with the modem to allow configuration
of setup parameters and user requests for traffic channel assignments. The interface is
provided on a 9-pin MINI-DIN female connector (DCE) located on the rear panel of the
SNM-1000. Refer to the following listing for User Port specifications.
Connector Type 9-pin MINI-DIN
Signal Type EIA-232
Rate 19.2 kbit/s, 8 bits-no parity-1stop
Note: Refer to Appendix A for a description of the software communications parameters
and for detailed message format information.
Pinout and signal levels are described in Table 2-3.
Table 2-3. SNM-1000 User Port Pinout and Signals
Signal Function Name Pin # I/O Signal Level
Receiver Ready RR 1 O EIA-232
Receive Data RD 2 O EIA-232
Send Data SD 3 I EIA-232
Terminal Ready TR 4 I EIA-232
Signal Ground SG 5
Data Mode DM 6 O EIA-232
Request to Send RS 7 I EIA-232
Clear to Send CS 8 O EIA-232
Incoming Call IC 9 O EIA-232