SAGEM 3P@C
Analysis and troubleshooting:
Step 1 The 0km test is done on the central office distribution frame, and this Modem can be normally synchronized. So, the Modem should be of no problem.
Step 2 In testing the telephone, calls can be normally made. There should be no problem to the splitter, and it is installed in the proper position.
Step 3 The environment for installing Modem indoors should excluded with
Step 4 In checking the house line, it is found that it is the parallel and aged seriously. And after the further investigation, the house parallel is found to be the common wires with a length of 80m or so. The line is exposed under the sun, and the junctions of the connector are not so firm. It is the result of unreliable house lines after analysis. The high frequency attenuation of the parallel is great and the connection quality is also poor, which leads the ADSL signal not to be normally borne.
Step 5 Change the house line into the copper twisted pair of 0.4mm, and everything becomes normal after the remaking of connectors for each parts, and Modem can be synchronized and calls can be normally made. This problem is solved.
Summary
The problem of house line quality is one of the common faults of external line.
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| The synchronization of ADSL Modem should be achieved in the |
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| respect of Modem, backbone, house line, splitter, routing method |
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| and peripheral environment, and a correct conclusion can be |
| Note | |
| obtained with the above factors excluded. |
3P@C Installation Manual
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SAGEM SA