ADSL Lite is proposed as a lower speed version of ADSL that will eliminate the need for telecom to install and maintain a premises based POTS splitter. Recent field trials of DSL Lite equipment jointly carried out by a group of manufacturers and a North America network operator has proved the technology, achieving maximum data rate for distance up t0 15000 feet, It was found necessary to include one or more low pass filters in series with the POTS terminals in order to reliably achieve maximum data rates. For POTS voice band service , the low pass filter provide protection from ADSL signal which may impact through non-line or other effects remote devices(handset, fax, voice band modem etc)and central office operation . For ADSL signal , it also provide protection from the high frequency transient and impedance effect that occur during POTS operation(ringing transients , on-hook, off-hook transient and so on).
| Parameter | Symbol | Limits | Unit |
| Collector-to-base voltage | VCBO | 300 | V |
| Collector-to-emitter voltage | VCEO | 300 | V |
| Emitter-to-base voltage | VEBO | 5 | V |
| Collector current | lc | 100 | mA |
| Collector dissipation | Pc | 200 | mW |
| Junction temperature | Tj | 150 | oC |
| Storage temperature | Tstg | -55+150 | oC |
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There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potenti- ometer pins provided that VCC is always more positive than or equal to VH and VL, i.e., VCC > VH,VL. The VCC ramp rate spec is always in effect.
