1.2.2.2 ADSL/ADSL2+ connection over PSTN (DSL connector)
The Teldat C1+LS router has a DSL connector in order to connect to an ADSL/ASDL2+ network over PSTN. This is
a female RJ11 connector with 4 wires. The central pair is used for data transmission/reception.
For connection, you can use the telephone cable with male RJ11connectors that are provided with the device.
Fig. 6:
DSL Connector (ADSL and ADSL2+)
The splitter
The Full Rate ADSL (ITU G.dmt or G.922.1) operating mode uses a higher transmission capacity that does not allow
the use of telephones directly connected to the same line. It is, therefore, necessary to use a mechanism known as
“splitter” to part the band frequencies for voice telephony from those used by the ADSL connection to transmit data.
This way, interferences between the telephone service and the ADSL service are avoided.
A typical installation with a splitter is shown in Figure 7.
Fig. 7:
ADSL installation with a splitter
The micro-filters
The G. Lite (ITU G.922.2) operating mode uses reduced transmission power, allowing the use of telephones directly
connected to the same line by means of a device known as a “micro-filter”. This device stops the ADSL signal from
reaching the telephone and prevents any undesired signal generated by the telephone from interfering with the ADSL
signal.
A typical installation with a splitter is shown in Figure 8.
Teldat S.A.
1 Installing the Router
Teldat C1+LS Router
5
