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The 965DSP will count and display the number of 
near-end and far-end errors. 
“Near-end” errors are the errors detected at the 
965DSP. “Far-end” errors are errors detected at an 
ISDN line card. (The far-end count is transmitted to 
the 965DSP over the ISDN link.) 
The screen displays the elapsed time since the start of 
the ISDN Error Test. Standard practice is to monitor 
the line for a fixed period of time (for example, 5 or 
15 minutes) and count the number of errors. 
Near-end and far-end errors are “blocks” of bit 
errors. If there are no block errors in a given period 
of time, this insures there will be no bit errors in the 
same period. 
The 965DSP will automatically stop counting errors 
after 15 minutes. 
The word “Link” will be displayed as long as the 
965DSP is linked to the ISDN line. If the link is lost, 
the screen will display “Link Lost.”  
Press the [Enter] key to start the test again. 
ISDN Error Test (supported countries only)
The 965DSP can perform a  near-end and far-end 
block error test after linking to an active ISDN line. 
 
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Note:  This function is suppressed in countries 
where ISDN interoperability with the 965DSP 
Block Error Test has not been verified.