SAGEM 3P@C

judged basing on the length of loop. The value for commissioning the ADSL service line is lower than 170nF.

„View the value of C a-gnd and C b-gnd, requiring the difference between these two should be less than 5%, the consistency between the C a-gnd and C b-gnd values reflects the quality of the parameters for Line A and B -ground balance. If these two values are greatly different, the connection rate and stability of ADSL would be affected.

„R a-b insulation resistance should be more than 200kΩ in normal condition, if less than this value, the subscriber line may suspend other devices, such as charge register, IP dialer and inquiry station dialing limiter.

Note

Before commissioning, the parameters of subscriber lines should be tested to ensure the commissioning of the ADSL service.

1.1.1.62Connection, Testing and Commissioning of User End Devices

1) Connection splitter

The ADSL service is the traditional voice and data services run on a twisted pair, requiring the installation of splitter at the user end to separate voice from data. The correct installation of ADSL splitters is a key step in the process of ADSL service commissioning.

The house line should be first connected into the Line port of the ADSL splitter, and all the audio devices should be connected to the Phone port of the splitter and ADSL Modem to the Modem port.

The practice of connecting to any voice devices before the Line port of the splitter should be prohibited, or else, Modem cannot work

Note normally.

The method for correctly connecting the splitter is shown in the figure below:

Figure 12-4 Connection of splitters

External line

Fax machine

Splitter

Telephone

Extension

Computer

Note

Some Modems are in-built with splitters, and the connection of the ports can be done as shown in the figure above.

3P@C Installation Manual

Page 12-9

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