Specifications

DeviceMaster Installation and Configuration Guide: 2000506 Rev. B Troubleshooting and Technical Support - 97
Troubleshooting and Technical Support
This section contains troubleshooting information for your DeviceMaster. You should
review the following subsections before calling Technical Support because they will
request that you perform many of the procedures or verifications before they will be able
to help you diagnose a problem.
• Troubleshooting Checklist
on Page 97
• General Troubleshooting on Page 99
• Daisy-Chaining DeviceMaster 2E/4/8/16-Port Units on Page 101
If you cannot diagnose the problem, you can contact Technical Support on Page 102.
Troubleshooting Checklist
The following checklist may help you diagnose your problem:
• Verify that you are using the correct types of cables on the correct connectors and that
all cables are connected securely.
Note: Most customer problems reported to Comtrol Technical Support are eventually
traced to cabling or network problems.
• Isolate the DeviceMaster from the network by connecting the device directly to a NIC
in a host system.
• Verify that the Ethernet hub and any other network devices between the system and
the DeviceMaster are powered up and operating.
• Reset the power on the DeviceMaster and watch the PWR or Status light activity.
Model Connected to
Ethernet
Cable
Connector Name
1-Port
Ethernet hub or
NIC
Standard 10/100 ETHERNET
1-Port Embedded
Ethernet hub or
NIC
Standard
RJ45 port (not
labeled)
2-Port - 1E
Ethernet hub or
NIC
Standard 10/100
2-Port - 2E (dual
Ethernet ports)
NIC or Ethernet
hub
Standard 10/100 - E1/E2
4/8-Port
NIC Standard DOWN
Ethernet hub Standard UP
16-Port (external
power supply)
NIC Standard DOWN
Ethernet hub Standard UP
16/32-Port (internal
power supply)
Ethernet hub or
NIC
Standard 10/100 NETWORK
PWR or Status LED Description
5 sec. off, 3 flashes, 5 sec. off, 3 flashes ... Redboot
™ checksum failure.
5 sec. off, 4 flashes, 5 sec. off, 4 flashes ... SREC load failure.