Cisco Model D-PCG1000 PowerKEY CAS Gateway Maintenance Manual
GQAM GbE Output Does Not Show a Link LED
4019476 Rev B
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GQAM GbE Output Does Not Show a Link LED
Introduction
If the Link LED on the front panel of the GQAM modulator is not illuminated, use
these procedures to troubleshoot the configuration.
these procedures to troubleshoot the configuration.
Note: These procedures normally only need to be completed during installation. If
you continue to have issues with the Link LED, contact Cisco Services.
you continue to have issues with the Link LED, contact Cisco Services.
The gigabit Ethernet port on a GQAM is designed to use interface modules. The
interface modules allow the GQAMs to operate with copper or fiber connections.
There are two types of interface modules for the GQAM:
interface modules allow the GQAMs to operate with copper or fiber connections.
There are two types of interface modules for the GQAM:
Gigabit Interface Converter (GBIC) module
Dual Small Form-Factor Pluggable (SFP) module
The GQAMs use the interface modules to communicate with devices in the network.
The interface module uses the auto negotiate setting to automatically determine the
optimal link rate and duplex mode for the port to operate correctly. The auto
negotiate setting must be configured on both the GQAM and the device it is
connected to in the network. If only one device is configured for the auto negotiate
setting, then there is no link between the devices and the port does not operate
correctly. The operator can manually configure the auto negotiate setting on the
GQAM or the connected device by using one of the following settings:
The interface module uses the auto negotiate setting to automatically determine the
optimal link rate and duplex mode for the port to operate correctly. The auto
negotiate setting must be configured on both the GQAM and the device it is
connected to in the network. If only one device is configured for the auto negotiate
setting, then there is no link between the devices and the port does not operate
correctly. The operator can manually configure the auto negotiate setting on the
GQAM or the connected device by using one of the following settings:
0 — Off
1 — On
2 — Query (Auto)
GQAMs are currently being shipped from the factory with the auto negotiate setting
configured at 2 for all ports. This setting is commonly used for most interface
modules. However, there are module manufacturers that require the auto negotiate
setting to be either 0 or 1 to operate correctly. This section provides instructions to
manually configure the auto negotiate setting.
configured at 2 for all ports. This setting is commonly used for most interface
modules. However, there are module manufacturers that require the auto negotiate
setting to be either 0 or 1 to operate correctly. This section provides instructions to
manually configure the auto negotiate setting.
Configure Auto Negotiate Setting
We recommend that you complete the following procedure to change the auto
negotiate setting. As you begin this procedure, a computer or terminal server is
required to be connected to the craft port of the GQAM.
negotiate setting. As you begin this procedure, a computer or terminal server is
required to be connected to the craft port of the GQAM.
Important: This procedure assumes that the GQAM is powered on. If you do not see
a command prompt, press the Enter key until the prompt displays on the screen.
a command prompt, press the Enter key until the prompt displays on the screen.