16
BT-CMTS Series
Setup Guide
Section 9 - Modem Connection Steps
When hooking up a modem for the first time pay close attention to the front panel LEDs of the cable modem; each step must
be completed before moving on to the next
Basic modem connection steps:
Modem attempts to RF lock to the Downstream (DS) carrier (blinking LED)
Modem RF locks to the Downstream (DS) carrier (solid LED)
Modem attempts to RF lock to the Upstream (US) carrier (blinking LED)
Modem RF locks to the Upstream (US) carrier (solid LED)
Communication with CMTS
• DHCP request of IP address
•
Receives a provisioning/configuration file from TFTP server
Channel bonds
The following image (Figure 9a) is an example of a typical layout of indicator LEDs:
1
2
3
4
5
6
Figure 9a - Cable Modem LED (example)
INDICATOR
STATUS
DESCRIPTION
DS
Green-Blinking
Searching for DS frequency
Green-Solid
DS locked 1 channel
US
Green-Blinking
Searching for US frequency
Green-Solid
US locked 1 channel
DS_L
Green-Solid
Locked channel bonded
US_L
Green-Solid
Locked channel bonded
STATUS
Green-Blinking
CM is registering with CMTS
Green-Solid
Ready for data transfer
LINK
Green-Blinking
Transmitting/receiving data
Green-Solid
Valid Ethernet link
Figure 9b - LED Indicator Description Table
