Blonder tongue CMTS Edge Series Manual de usuario

CMTS Edge Series

Universal Quick Start Guide

May 2022

Version: Draft

CMTS Edge Series Universal Quick Start Guide

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Overview

This guide will help you configure a Blonder Tongue CMTS Edge 16/32/32P or the CMTS Edge MAX to

enable cable modems (CMs) to work with these CMTS’s on a “6-foot cable plant”in a lab setting. Before

moving your CMTS to a production setting you should review the RF power and attenuation

requirements for your environment to ensure that the correct signal power is sent to and from your RF

network. For more information, detailed explanations, and alternate setup options, please refer to the

CMTS Command Reference Guide.

Section 1 –Accessing the CMTS

The control port is a special management interface used for

configuration purposes. The default IP address of the Control Port

of the CMTS is 192.168.0.10.

1. Set your computer to 192.168.0.5 as shown in

Figure 1b.

2. Connect a computer to the Control Port of the

CMTS as shown in Figure 1a.

** For Reference: The default emergency recovery address of the

SFP+/10Gbe port of the CMTS is 192.168.168.100/24. To access the CMTS through this port, set your

computer to an IP address in that subnet, such as 192.168.168.105/24. Note: this IP address is not

changeable, so you must avoid using this IP address range for the user-configurable Uplink port IP

address in a production setting to prevent IP networking conflicts that result in networking failures.

3. Open a web browser on the PC and enter 192.168.0.10 in the address bar. The CMTS GUI appears

with a login screen, as shown in Figure 2.

5. Enter the username and password “admin / admin” and hit the LOGIN button to access the CMTS.

Figure 1b –Network Configuration on PC

IP = 192.168.0.5

CMTS

Control Port

IP = 192.168.0.10

Figure 1a –Diagram of Control Port Connection

Ethernet Cable

Figure 2 –Login Screen

Username = admin (case sensitive)

Password = admin (case sensitive)

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The Basic Menu, a simplified GUI, will appear (Figure 3).

6. Click on the Advanced Menu button at the bottom of the screen, below the menu options. The

Advanced Menu, with Device Snapshot will appear (Figure 4), with a vertical menu on the left side of the

screen.

Section 2 –Setting up CMTS Internet Connections

1. Select Network Config from the left menu tree (Figure 5),

under the Network Management Folder

2. Set the Outband IP Address for administrative access (Control Port IP

Address), if changing from the default IP address (Figure 6).

NOTE: You will have to login again with the new IP address if you change

the Outband IP Address, and are connected to the Control Port of the CMTS.

Ensure your computer is in the same IP range as the new IP address.

Figure 3 –Basic Menu Screen

Figure 4 –Advanced Menu Screen

Figure 5

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3. Set the Network IP Address for the SFP+/10Gbe port on the CMTS (Figure 6). If this is a lab

environment with no uplink connection for Internet access yet, this address is still necessary for

the Local Provisioning setup in the next section. When CMTS is being setup for a live

environment, this will be the address of the CMTS on the data network, and the Gateway

Address should be the address of the router connected to the CMTS uplink port.

Note: If you put a Gateway address in that is unreachable, once the Submit button is

pressed the CMTS will display an error message. Accept the error message and continue

setting up the CMTS.

Section 3 –Setup DHCP and TFTP Services for CMs

The CMTS can provide DHCP and TFTP server services internally, to provide DHCP IP Addresses and CM

config files to the CMs.

Global DHCP enables the CMTS to send DHCP addresses to CMs. The CPE Switch option enables the

CMTS to send DHCP addresses to CPEs from the same IP pool as the cable modems. For lab testing with

CMs and no CPEs, only Global DHCP needs to be ON. If you are testing with CPEs, both Global DHCP and

CPE Switch needs to be ON.

Note: It is not recommended to enable DHCP support for CPE in a production setting because

end users could gain access to the cable modem management network, which introduces a

significant security risk! Use an external DHCP server for CPE devices.

Figure 6 –Network Config

Clicking the Submit button will apply changes to the Running Configuration.

The Save Config button on the top right must be clicked to save changes to

non-volatile memory for the Startup Configuration.

If the Save Config button is not clicked, and the CMTS is power cycled or loses

power, the unit will revert to previous settings when it is powered back on.

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1. On the left menu, under the Network Management folder, click Local-Provision Management.

This opens a new tab for setting up the DHCP address pool and uploading a CM config file to be

sent to the CMs. (Figure 7)

2. Set Global DHCP to ON for cable modems.

3. Click SUBMIT button (to save to Running Configuration) –Accept confirmation screen

4. Click Save Config button (to save to Startup Configuration) –Accept confirmation screen

5. Click the Load CM Config button to open a dialog box for uploading pre-configured DOCSIS CM

configuration files to the CMTS. CM Profile allows selection of cm.cfg (for 2.0 CMs) or cm30.cfg

(for DOCSIS 3.0 CMs).

NOTE: CMTS does not ship with a default CM configuration file installed.

Figure 7 –Local-Provision Management

Figure 8 –Load CM Config Dialog Box

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6. If running 2.0, 3.0 and 3.1 modems, load a config file in each relative area. In most applications,

the same config file can be loaded into both sections. The CMTS will change the name of the

config file internally from your file name to “cm.cfg”and “cm30.cfg” respectively when

uploaded to the CMTS. DOCSIS 3.1 modems will also use the cm3.0.cfg file.

7. Select File / Browse button is used to select the pre-configured CM configuration file from your

computer to upload to the CMTS.

8. Load button is used once the CM config file is selected, to upload the file to the CMTS. You will

need to load each config file (cm.cfg and cm30.cfg) separately.

9. Go to the Local-Provision IPV4 Address Pool Config sub-tab in the Local-Provision Management

tab. (Figure 9)

10. Enable 3.0CM Profiles should be on if using 3.0 CMs as well as 2.0 CMs. If your CMTS has a

DOCSIS 3.1 option, do NOT enable that checkbox, as DOCSIS 3.1 modems will use the same file

as the DOCSIS 3.0 modems.

11. DHCP Lease Time is user configurable. You may choose to set the time to 1 hour for testing, as

the default is 10 days.

12. DNS Server IP Addresses are necessary when connected to the Internet to resolve domain

names but only for CPE devices when they are being provisioned during testing. 8.8.8.8 and

8.8.4.4 are Google public DNS servers that may be used.

13. DHCP Address Pool is the address range the CMTS will supply to the CMs (and CPEs, if setup for

that). This range must include the Uplink IP Address (SFP+/10Gbe –set in Section 2) for the CM

to be accessible for network management .

14. Default Route Is the IP Address of the Uplink Gateway (entered on Network Config tab in

Section 2)

Device Configuration should have the Network IP Address (From Network Config tab, Section 2) on both

the Server Host IP and TFTP Server Address.

15. Click the SUBMIT button to save the Running Configuration –accept confirmation screen

16. Click the Save Config button to save to the Startup Configuration –accept confirmation screen

Figure 9 –Local-Provision IPV4 Address Pool Config

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Section 4 –RF Setup –Setting US and DS channels in the CMTS

1. Select US Channels Configuration from the RF Configuration menu option on the left menu (see

Figure 10). The US channels available is shown in the right-side window. Double-clicking on any

value in a column/row intersection allows editing the value for that channel (row).

2. Select suitable center frequencies (Central Freq) for your US channels, bandwidth (Freq Width)

of your channels, Modulation mode (Modulate Template), Channel Mode, and Rx Level.

**NOTE: Freq Width, Modulate Template, Channel Mode and Rx Level will be the same for all

channels. Only one line needs to be changed, and when another line is clicked, the entire

column will populate with the same value.

3. The Center Frequency and Frequency Width must be set so the channels do not overlap. A

center frequency of 15.4 MHz, and Frequency Width of 3.2 MHz, means the channel will occupy

the spectrum from 13.8 –17.0 MHz.

4. The Frequency Width and Modulate Template determine the total bandwidth (bitrate) capacity

of that upstream channel. For US channels, a QPSK channel at 2.56 Mbaud will provide ~5.12

Mbps throughput.

5. In most cases, for best performance the Rx Level of the US channels should be 0 dBmV.

NOTE: Some cable systems may require a higher setting when the RF environment is “noisy” and

modems must be told to transmit at a higher power level.

6. When making changes, a red triangle will appear on all values that have not been saved. Once

SUBMIT button has been pressed, these will disappear. Click SUBMIT button and accept the

confirmation screen.

Figure 10 –US Channel Configuration

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7. Click Save Config button and accept confirmation screen.

8. To turn on US channels, click the boxes on the left side of the US Channels frame, then click

“Open Channel” on the top menu bar (green check mark). In the above example, there are 4 US

channels open. Accept the Confirmation Screen.

For DS Channels, click the DS Channels Configuration menu item on the left menu. (Figure 11)

As with the US Channels, several columns will modify the whole column, once the first row is changed.

1. Set Mode first, ensuring “annex B” for United States channel plans.

2. Set Center Frequency of first DS Channel. Once set, click to another line; all other lines will follow

accordingly. Be sure to use the North American Cable Plan when selecting the center frequency. The

number of DS channels you can configure and activate is based on the number of channels your

CMTS is licensed to support.

3. Set Modulation to QAM256 for highest throughput.

4. Set Interleaver to (64,2) for a typical environment, or use 128/1 for a very clean, noise-free cable

plant.

5. Set Power to 40-45 dBmV.

6. Click SUBMIT button and accept the confirmation screen.

7. Click Save Config button and accept confirmation screen.

8. Open (activate) the DS channels you have configured by clicking the left box next to each channel

you want to enable. Ensure these channels are not overlapping with any other service on the RF

network.

Figure 11 –DS Channel Configuration

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Section 5 –Physical setup of RF Network for Lab Testing

1. CMTS US Port 4 to Low Freq. side of Diplexer

2. CMTS DS Port to High Freq. Side of Diplexer

3. Common Port of Diplexer to Distribution

4. 40 dB total Attenuation between CMTS and

CMs for testing (including attenuators, splitters

and taps)

5. If DMM-5500 Series CM is used, must be in

conjunction with LG 5500 STB.

BT CMTS Series Lab / Test Network

Diplexer

Attenuators

Splitter/Tap

Figure 12 –RF Test Network Setup

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1. Setup the RF Network as shown in Figure 12.

2. Ensure you are using a Diplexer appropriate for the frequencies set up in your CMTS.

a. Sub-split diplexer (shown above) uses 5-42 MHz low freq. / 54-1000 MHz high freq.

b. Mid-split diplexer uses 5-85 MHz / 108-1218 MHz

c. High-split diplexer uses 5-204 MHz / 258-1218 MHz

3. US Ports 3 and 4 of CMTS on the CMTS Edge 16 and CMTS Edge 32 models correspond to US

channels 1-12. Use port 3 or 4 to connect to the Low Frequency port of the Diplexer.

a. For the CMTS Edge MAX DOCSIS 3.1 CMTS additional US channels #15-#26 are available

and correspond to US Ports 1 and 2 in the event there is a need for a second upstream

service group.

4. The DS Port of CMTS goes to High Frequency side of the Diplexer.

5. There must be 40 dB of attenuation between the CMTS and CM for proper operation. This

includes attenuation created by splitters, taps, and any inline attenuators you install.

6. If testing to a single CM, you can use a single cable from the Diplexer Common port to the CM,

with 40 dB of total attenuation inline on the common port.

7. For multiple CMs under test, use splitters and/or taps as necessary and ensure to maintain 40

dB attenuation between CMTS and all CMs.

Section 6 –Verify CMs are Online in CMTS

In the left menu click CM List under the Terminal Device Management section. This will bring up a page

that shows all CMs and their provisioning status. Once a CM has completed its DOCSIS provisioning

steps with the CMTS, it will appear on this list and the Status will be w-online (wideband online). This

page does not auto refresh; there is a refresh button on the top menu bar to renew the data on the

Figure 13 –CM List

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