Sagem 4450E - Manual (Page 172)

SAGEM 3P@C
3P@C Installation Manual
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(3) The connectors of Line A and B have not wrapped properly with insulation tape, and frequent short-circuits
occur due to the external force.
(4) The splitter is not properly used, and its external interfaces are connected with telephone extensions, fax
machines, IP dialers and audio Modems in series and parallel.
(5) When the subscriber line exceeds 2.5km, the house line uses the too long parallels of aluminium or iron.
(6) The house line passes the radio sources that affect the ADSL service transmission.
2) Common faults in ADSL connection
The problem of the ADSL connection is reflected by users’ incapable of normally accessing the Internet. The
causes and handling mode for this problem boils down to the following aspects:
(1) The subscriber line failure: It is recommended to check short circuits or circuit break of the telephone set.
(2) Modem failure, the power-on/off is used to judge whether the Modem can be normally started.
(3) Check the Modem indicator, if the Link indicator is off, it indicates the broken connection of Modem.
(4) Check the correctness of the in-door splitter connection, and the addition of audio devices and telephone
extensions at the front interfaces of the splitter.
1.1.1.65 Case Analysis
1) Synchronization of subscriber ADSL Modem impossible
It is one of the common problems in the ADSL application, and there are many causes for this. Including:
„ Quality of ADSL Modem
„ Irrational wiring
„ Environmental factors
„ Line fault
„ Office equipment configuration
The faults are generally removed in the way of segmental test, and the test instruments are used if necessary.
Case Background
In the implementation of ADSL number allocation, the ADSL Modem of a subscriber cannot be synchronized all
along, but the same Modem can be normally synchronized in the 0-kilometer test. The home of the subscriber
should be 2.6km or so away from the office end equipment.
Fault symptom
Correctly connect the splitter, telephone sets and Modems, and the Modem cannot be synchronized.