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Configuring WAN Line Services

7-42

117345-B Rev. 00

Table 7-4. Send Commands for MCE1 and MCT1 Port Tests

Send Command Function

Reset BERT Counters Resets all counters to 0

Insert 1 Error Inserts a single (nonrepeating) error into the bit stream

Insert 1 Error/1K Inserts a deliberate error into every thousandth position in the

bit stream

Insert 1 Error/1M Inserts a deliberate error into every millionth position in the bit

stream

Disable Insert Error Stops the insertion of deliberate errors into the bit stream

Note:

FDL loopback command options apply only when the MCT1 line type

is configured as ESF for testing. For more information about FDL loopback

codes, see ANSI T1.408 ISDN Primary Rate - Customer Installation Metallic

Interfaces Layer 1 Specification.

Table 7-5. Send Commands for MCT1 Port Loopback

Send Command Function

Loop Up Sends a loop-up code to the remote end to initiate line

loopback. After a minimum of 4.5 seconds, the port loops

receive data back onto the T1 transmit path at the T1 interface.

The line type setting determines the coding scheme.

Loop Down Sends a loop-down code to the remote end to stop the line

loopback condition

FDL Payload Loop Sends a loop-up code to the remote end to initiate payload

loopback

FDL Disable Payload Sends a loop-down code to the remote end to stop the payload

loopback

FDL Line Loop CI Sends a Customer Installation (CI) loopback message

FDL Line Loop IA Sends a CI loopback message, indicating that it originates from

the CSU

FDL Line Loop IB Sends a CI loopback message, indicating that it originates from

the DSU

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