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Site Manager WAN Line Services Parameters

117345-B Rev. 00

A-17

Parameter: Loopback Configuration

Path: HSSI Connector > Edit Line > Edit HSSI Parameters

Default: No_Loopback

Options: No_Loopback

Local_Digital

Local_Line

Remote_Line

Function: Sets the DTE loopback mode over normal full-duplex operation. DTE loopback

is a diagnostic test that causes the DTE to transmit a signal to the DCE. The

DTE then waits for the DCE to return the signal. The DCE provides the transmit

and receive clock signals.

Instructions: Click on Values and select one of the following DTE loopback settings:

• No_Loopback -- Prevents the DTE from sending loopback signals to the

DCE.

• Local_Digital (Loop A) -- Allows the DTE to check the DTE/DCE interface.

In a Loop A test, the DTE transmission is returned to the DTE on the received

local DCE data circuit. The CA LED (DCE Ready) must be on.

• Local_Line (Loop B) -- Allows the DTE to check the DTE/DCE interface and

the transmit and receive sections of the local DCE. In a Loop B test, the output

of the transmit section of the DCE is returned to the receive section of the

DCE. The CA LED (DCE Ready) must be on.

• Remote_Line (Loop C) -- Allows the DTE to check the functions of the

transmission path to the remote DCE interface.

MIB Object ID: 1.3.6.1.4.1.18.3.4.7.1.67

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