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ARCXTEND USER MANUAL – R1.4, ISSUE 4
Copyright 2005 Arcwave, Inc. 22
DHCP Server Setup
The Hub’s ECM requires an IP address and its own unique configuration file. In order for the ECM
to be assigned an IP address and be loaded with the proper configuration file the following actions
are required:
Set up a DHCP pool on your server for the ARCXtend ECMs to ensure that the ECM is properly
configured and addressed.
ECM Configuration File
The ECM has its own DOCSIS standard format configuration file, ecm.cfg, which is pre-loaded at
the factory and loaded on the ECM. A copy is also included on the documentation CD and
downloadable from the customer support page of the www.arcwave.com
web site. The
configuration file should be edited be prior to installation to confirm with cable network specific
settings.
The configuration file for the ARCXtend ECM contains the following information:
• Downstream channel parameters (optional)
• UCD which specifies the upstream channel parameters (optional)
• Authentication parameters (optional)
• Registration parameters (mandatory)
• ECM firmware upgrade file name (optional)
The Hub ECM and attached wireless subscriber cable modem must be assigned to the same
upstream frequency and must not
be part of an upstream group supporting multiple upstream
channels.
TCP/IP Port Filtering
TCP/IP port filtering is the practice of selectively enabling or disabling Transmission Control
Protocol (TCP) ports and User Datagram Protocol (UDP) ports on computers or network devices.
The following ports must be open for SNMP, HTTP, and TFTP applications to be performed on the
Hub:
• Port 161/162 for SNMP
• Port 80 for HTTP
• Port 69 for TFTP
Hub Electrical Interface
The Hub is connected to the cable plant using a power-passing tap spliced in at the desired location
on the cable plant.
AC Powering and Surge Protection
In strand mount applications, the Hub is powered through the input RF port. The Hub is capable of
60 VAC or 90 VAC powering power. The internal power supply provides a regulated 24 VDC output