User's Manual

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Configuration Overview – p. 24

For the ipLease DHCP Server tool, the CM.SRC file is an ASCII text file that may

be edited using any text editor (such as Notepad). This document describes the

configuration process using the ipLease tool. The changes are similar for other

DHCP servers. Note that if another operating system, such as the Windows

200x Server, is used a DHCP server is often included. Check with your Vyyo

representative to make sure the DHCP server is compatible.

NOTE: Before the modem can acquire an IP address, the

WMTS must be configured with its own IP address This

procedure is described later in this document in the

section entitled Setting the WMTS IP Address. The

WMTS IP address is specified in a different configuration

file (regtree.rtr) which may be edited using the

XmtsConfigurationFileEditor tool.

After the modem successfully receives its IP address it contacts the TOD server

to establish the time of day. Next, it contacts the TFTP server to download the

modem configuration file, which specifies the final DOCSIS parameters for the

modem. This file is also referred to as the modem “boot” file. All further

communication done by the modem uses the parameters specified in this file.

This file may cause the modem to change frequencies or reboot in order to reset

some of its configuration parameters. The modem will acquire this file every time

it is reset or restarted. Configuration changes to the modem configuration file

(profile) will be done from the Operation center with out the need to visit the

modem remote location for any setup change; These changes may include

encryption, QoS., IP filters, downstream channel parameters. etc….

NOTE: the modem configuration file is modified using the

CMconfigFileEditor tool..

During the final phase of the DOCIS registration process, the modem sends a

registration message to the WMTS confirming that the configuration file was

received. The WMTS retrieves a copy of the configuration file from the

configuration file server TFTP root repository directory. The WMTS then

compares the file from the server with the data from the modem to ensure that

the modem will only use services for which it was authorized. The modem is then

finally allowed to transmit real user data into the network, but only after the

modem’s configuration file values are crosschecked by the WMTS.

At this point, a data only modem will be successfully connected to the system.

2.5 E1/T1 Layer

After IP connectivity is established, E1 or T1 connectivity may be established.

Note that in addition to installing an E1/T1 card into the WMTS chassis, E1 and

T1 each require that different firmware be loaded into both the WMTS and the

modem.

The E1/T1 configuration will require appropriate changes to the modem

configuration file in addition to setting those configuration parameters used for a