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704-939-B10-001 Rev. A5 (06/2019)
2.0 Overview
2.1 System Diagram
Fig. 2-1, Representative System Arrangement
• All power supply data is stored in the power supply Inverter Module’s class information base (CIB) tables in
the power supply. This data is accessible directly via the power supply’s LCD Display (see the power supply’s
technical manual for details). The CIB tables are the source of the transponder’s data.
• The DM3X Transponder contains both SCTE-HMS Management Information Base (MIBs) and the proprietary
Alpha MIB tables. The SCTE-HMS MIBs are industry standard MIB tables that store power supply, battery and
generator data from the CIB tables (See Section 6.0, Data Management). The Alpha MIB contains all the data of
the SCTE-HMS MIBs plus additional power supply settings and values as well as the transponder’s configuration
values.
• A fixed or stationary external generator or additional power supplies may be connected through the COM
(AlphaBus) port permitting monitoring locally through the Ethernet connector or remotely via the Web page or
SNMP-based Network Management System.
• Power supply and transponder parameters can be monitored and set locally using a personal computer and a
standard Ethernet cable.
• The transponder transmits data via its cable modem directly over the Coax or Hybrid Fiber Coax network.
• The Cable Modem Termination System (CMTS) is the bridge between the cable network and the TCP/IP network.
The transponder’s cable modem communicates over the HFC network to the CMTS.
• The Dynamic Host Control Protocol (DHCP) server needs to be provisioned with the transponder’s cable modem
CM MAC address and the MAC address needs to be assigned a DOCSIS Configuration File.
• The DOCSIS Configuration File and firmware files should be available in the Root Directory of the Trivial File
Transfer Protocol (TFTP) Server.
• The Time of Day (TOD) Server provides the cable modem with the current date and time.
• A Network Management System (NMS) or MIB Browser allows remote monitoring, control, and configuration of
the transponder, power supply, and connected device parameters. Alarms and traps can be set and monitored.
• The power supply and generator data may be accessed remotely through the transponder’s Web page by placing
its IP address into a standard Web browser.
• The following ports of the Transmission Control Protocol/Internet Protocol network must be opened: 161=SNMP,
162=SNMP, Traps, 69=TFTP, 80=HTTP, 37=TOD.
Coax/HFC Network
CMTS
DHCP Server
Local Computer
External Generator
Power Supply
DM3X Transponder
TFTP Server
TOD Server
Web Browser
TCP/IP Network
SNMP-based Network Management System
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