ZyXEL Communications MSC1000G Series, Руководство пользователя

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Chapter 6 Diagnostic Screens
Management Switch Card User’s Guide
171
6.7 CFM Loopback Screen
Click Diagnostic > CFM Loopback in the navigation panel to display this screen. Use this screen
to perform a loopback connectivity test on a link.
Type This field applies when you select the Ring Voltage , Pulse and DTMF Digit , or All MLT
tests.
If you selected All tests, use 0 to perform all tests or 1 to test AC voltage, DC voltage,
isolation resistance, and capacitance.
If you selected the Ring Voltage test, use 0 to have the system automatically start and
stop ringing or use 1 to manually start the ringing and 2 to manually stop the ringing.
If you selected the Pulse and DTMF Digit test, use 0 for automatic testing or 1 for
manual testing. With 1 , use the Count field to specify how many manual inputs are
required to finish the test.
Count When performing the Pulse and DTMF Digit test with Type set to 1 (manual testing),
select the number of manual inputs required to finish the test.
All Perform all the MLT tests.
AC Voltage Test the line’s AC voltage.
DC Voltage Test the line’s DC voltage.
Load
Resistance
Test the line’s load resistance.
Isolation
Resistance
Test the line’s isolation resistance.
Capacitor Test the line’s capacitance.
Ring Voltage Test the line’s ring voltage.
Metering
Voltage
Test the line’s metering voltage.
REN Value Test the line’s ringer equivalent number.
Draw and
Break Dial
Tone
Test the elapsed time between a line going off-hook and the dial tone beginning.
Pulse and
DTMF Digit
Detect and measure pulse digits and DTMF digits on the line.
Receiver Off-
Hook
Test whether the line is off-hook, on-hook, short, or open.
Table 68
MLT
LABEL DESCRIPTION