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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
(continued)
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