Comtech EF Data DMD-2050E - Manual (Page 51)

DMD2050E Universal Satellite Modem Theory of Operation
MN-DMD2050E Revision 2 3–9
3.2.8 Ethernet M&C Port
This port is dedicated for Ethernet Communications supporting SNMP, FTP and Web Browser.
The port is configured for 10 Base-T communications protocols. The Ethernet M&C Interface
requires a standard RJ45 Male connector.
See also:
Appendix D, Web Interface Setup Guide
Appendix F, TCP/IP Ethernet Setup
3.2.9 Modem Monitor Status
The modems M&C system is connected to most of the circuitry on any board contained in the
chassis. These connections provide status on the working condition of the circuitry as well as
providing the data required for the various measurements the modem provides. The M&C
processes this information and generates status indications as well as alarms when necessary.
Detailed status information is available via the modems various user interfaces (front panel,
remote and terminal). A summary of this information can be connected to external equipment,
switches or alarms via the open collector and/or form-C fault connections
Form-C Contacts:
The UIM provides three Form-C Relays under processor control that appear at J15.
Mod Fault: De-energized when any transmit side fault is detected.
Demod Fault: De-energized when any receive side fault is detected.
Common Fault: De-energized when any fault that is not explicitly a Tx or Rx Fault
such as an M&C or Power Supply Fault.
Open Collector Faults:
The UIM provides two Open Collector Faults that appear at Pins 18 & 21 on J19.
Mod Fault: Will sink up to 20 ma (maximum) until a transmit or common fault
is detected. Will not sink current if a fault is detected.
Demod Fault: Will sink up to 20 ma (maximum) until a receive or common fault
is detected. Will not sink current if a fault is detected.
The open collector faults are intended for use in redundancy switch applications in order to
provide quick status indications.