User's Manual Part 2

158 APCD-LM043-8.0 (DRAFT C)

9: Installing the EUM

Using the sample configuration shown in Figure 60, confirm the connection between the end-

user’s PC and the EUM as demonstrated below:

This is what successful ping from the end-user’s PC to the EUM looks like:

C:\>ping 172.16.6.1

Pinging 172.16.6.1 with 32 bytes of data:

Reply from 172.16.6.1: bytes=32 time<10ms TTL=64

Ping statistics for 172.16.6.1:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>

This is what an unsuccessful ping from the end-user’s PC to the EUM looks like:

C:\>ping 172.16.10.1

Pinging 172.16.10.1 with 32 bytes of data:

Request timed out.

Ping statistics for 172.16.10.1:

Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>

Testing the Data Link from the End-user’s PC to the Network

Once the connection from the PC to the EUM is confirmed, ping the EUM gateway address

from a PC DOS window. Ping with short packets first to confirm function, and then with long

packets (1472 byte packets) to confirm performance. Errors observed on pings with long

packets indicate a high error rate on the channel, caused by low signal levels or interference.

To Ping a CCU with the Maximum Packet Size

1. Open a DOS window.

2. At the command prompt, type

ping <aaa.bbb.ccc.ddd> -t -L 1472, where

<aaa.bbb.ccc.ddd> is the CCU radio IP address and press

Enter.

3. Press

Ctrl+c to end the test.

NOTE: If this test fails, but pinging the CCU with the default packet size

succeeds, then the connection is working but is not operating at

maximum capacity, possibly due to poor antenna placement or

orientation.