9.0 Start Up and Verification, continued
89
704-939-B10-001 Rev. A5 (06/2019)
9.5 Dual IP Mode
9.5.1 Overview
The DM3X Transponder can operate in either Single (default) or Dual IP mode. In Single IP mode, data from both the
cable modem and power supply are accessed and managed through the modem’s IP address on the secure private
modem network. In Dual IP mode, the Communications Module acts like a CPE device to the cable modem and registers
a second IP address on the public CPE network.
The following table lists some of the common characteristics of the DM3X Single IP and Dual IP configurations:
Table 9-3, Single IP Mode vs. Dual IP Mode
Single IP Mode vs. Dual IP Mode
Single IP
Dual IP
Network
All data from both the cable modem and
power supply are accessed and managed
through the modem’s IP address on the
secure private modem network.
The Communications Module acts like a CPE
device to the cable modem and registers a
second IP address on the public CPE network.
Data Access
The Network Management System requires
access to the same private modem network.
Dual IP mode allows the power supply data
to be accessed and managed from anywhere
within the public (CPE) network.
Security
Communication with the Communications
Module is limited to the private LAN network
and is very secure.
Since the Communications Module is a CPE
on the public network, access may be less
secure.
IP Addresses
Where the IP address pool is limited, there is
no need to issue the Communications Module
a CPE IP address. Only one (1) IP Address is
required for the cable modem of the DM3.
The CPE requires its own IP address, which
may be in short supply. A total of two (2) IP
addresses are required, one for the cable
modem and one for the Communications
Module.
Data Management
Access to the Communications Module is
limited to the private LAN network making
data management less versatile, especially for
field personnel.
The Communications Module is accessible
on the public (CPE) network. This makes data
management more versatile for field personnel.
Cable Modem
Communications Module (CPE)
MIB Tables
DM
One CM IP address, CM and Communications Module
data; accessible on the private (LAN) network.
One CPE IP address, Communications
Module data only; accessible on the public
(CPE) network.
One CM IP address only accessible on the private (LAN)
network with access to both CM and Communications
Module data.
Cable Modem
Communications Module
MIB Tables
DM
Fig. 9-6, Simplified Block Diagram Single IP Mode
Fig. 9-7, Simplified Block Diagram Dual IP Mode
