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MX2800 M13 Multiplexer User Manual
Configuration, Section 3
61200290L1-1G
    3-15
Figure 3-11.  Line Identification Menu
XCV Threshold
This value sets a limit on excessive code violations (ECVs) accepted by the unit over an individual T1/E1 
line before it switches controller cards. If set to 
Disabled
, code violations will not cause the unit to switch 
controller cards. The threshold limits are described in 
.
Table 3-2.  XCV Threshold Limits for T1/E1
Setting
The unit switches controller cards if...
1E
-3
More than one out of every 1,000 bits received on a T1/E1 line contains a code violation
1E
-4
More than one out of every 10,000 bits received on a T1/E1 line contains a code violation
1E
-5
More than one out of every 100,000 bits received on a T1/E1 line contains a code violation
1E
-6
More than one out of every 1,000,000 bits received on a T1/E1 line contains a code violation