Shenzhen customer sim6320c module off-line analysis report

Shenzhen customer sim6320c module off-line analysis report

1 Problem Description

sim6320c module on the wince+ Beijing Telecom 3G card device , dial-up Internet, idle minutes, dial-up automatic disconnection problem. but with Shenzhen and Shanghai Telecom 3G card will not automatically disconnect.

2 Cause Analysis

Detailed Analysis log is as follows:

(1) PPP dial succeeds, gets to IP 10.32.42.195:

Where the first 13:57:19.4 module (DTE) initiates a dial-up request and finally dials successfully

Figure 1

(2) After the successful dialing, a few ping packets, the last ping packet time is 13:59:02.2, the following ICMP packet;

At 14:09:09.3, the remote (DCE) initiates the termination request and finally disconnects the PPP connection

Figure 2

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Shenzhen customer sim6320c module off-line analysis report