Digital Modem Installation Guide

82 Appendix
CTA 500 dm On Line Guide P0873832 Issue 05
CTA 500 dm LED
The status LED is on the back of the CTA 500dm. It provides
information about the current state of the CTA 500dm and the
B-channels based on its ßashing pattern.
The following table shows the LED ßashing patterns and
CTA 500dm states.
LED Pattern CTA 500 dm State B-channel State
continuous on Idle both idle
single blink on Active one channel active
double blink on Active both channels active
single blink off off-line (error or powering up) not available
fast blink waiting for file download (refer to
“Installing CTA 500dm and
Norstar TAPI Service Provider
software” on page 12)
not available
slow blink out-of-sync (network not available)
(refer to “Power problem?” on
page 71)
not available