Siemens A53457 Installation & Maintenance page 121

If the serial interface is configured properly and the serial baud rate is correct, use a protocol
analyzer to confirm the serial ATCS device is sending ATCS messages to the WAG.
If the serial ATCS device is sending messages, the messages may be the problem. The WAG
does not add the device to the route table if the ATCS message is badly formatted, has a bad
address, or the CRC is invalid.
If faulty messages are the problem, check the serial interface configuration to see if the ATCS
device sending in the frames needs to be fixed.
If the ATCS messages being received are valid, the route table expiration timer may be too
short. Increase the route expiry timer value.
3. If the device is on the Ethernet IP interface, the device may not appear in the WAG route table
because of an incorrectly configured IP address or subnet mask. The user should verify that
the Ethernet interface is linked by observing that the LED located on the J2 connector is lit.
Refer to the following for LED information:
Link LED (Top of J2)
Color
Off
Amber
Green
The configurable network subnet mask bits and the IP address of all devices
should be checked. See Section 2 for information on configuration of the IP
network mask.
Verify that all devices that network with WAG are configured with the same subnet mask as
WAG. The WAG will discard any message from a network device whose subnet mask is
different.
Another cause can be routers, bridges, hubs, firewalls, or other IP devices between the WAG
and the ATCS device that is not appearing. Any one of these devices can be blocking the
communication path between the two end devices. If this is the case, remove all devices
between the ATCS device and the WAG to simplify the path and to confirm that the devices
can communicate successfully. Then install normal devices on the path until the failure is
isolated. At that point, reconfigure the router, bridge, or other device causing the problem.
Another cause is a duplicated IP address. If the configured IP address of the WAG or the ATCS
device is already being used, the devices will have problems communicating.
Document No.: COM-00-05-16
Version: C.1
Meaning
No Link
10 Mbps
100 Mbps
4-3
Activity LED (Bottom of J2)
Color
Off
Amber
Green
NOTE
June 2006, Revised June 2014
TROUBLESHOOTING
Meaning
No activity
Half-Duplex
Full-Duplex