Sagem 4450E - Manual (Page 181)

SAGEM 3P@C
3P@C Installation Manual
Page 12-24 Reproduction and communication in any form prohibited without the written permission of
SAGEM SA
Case Background
As shown in the figure below, the uplink interface of 3P@C 4450E is connected to PC2, while the downlink
interface is connected to a Modem and to PC1. The network adapter of PC1 is a 10M network adapter, set as
10M/Full; PC2 network adapter is in the auto-negotiation mode, set as Auto detect.
Figure 12-8 Networking diagram
Fault symptom
In application, it is found that the rate is very low upon transmitting files with FTP between PC2 and PC1; check
the status of Modem, and the duplex status of Modem is negotiated to 10M/Half.
Analysis and troubleshooting:
Step 1 It can be judged that the cause for low rate is the different duplex
modes at the two ends of the line.
Step 2 Configure the duplex modes of Modem and PC1 network adapter as
the same, that is 10M/Full or 10M/Half.
Step 3 Transmit via FTP, and the rate becomes higher. This problem is
solved.