61200305L1-1 ATLAS 550 User Manual E-1Appendix E TroubleshootingModules seated improperly, module failureRemove all modules and cycle power to the unit. If self test still fails, callTechnical Support and report the results. If the self test now passes, re-insertmodules one at a time, running the self test after installing each module.When an installed module causes the self test to fail, note it and report re-sults to Technical Support (see last page of this manual).Selected Timing Source is not present or clock is out of toler-ance• Verify that system timing is correctly configured for the desired clock.• Verify that the interface cable to clock source is present.• Temporarily configure the system to operate off of internal timing. Ver-ify that the system can lock to this clock.Max Telnet sessions set to 0, IP address of ATLAS 550 does notmatch remote host IP address• Verify that the Ethernet connection is in place, check IP addresses pro-grammed in ATLAS 550 and in the Telnet client, verify that session time-out value is not set too low.• Verify the link is up via the Ethernet LED.Power-up Self Test FailsSystem Timing Source Unlocked(Displayed on Terminal Interface, “System Status”)Cannot establish Telnet session with ATLAS 550
