eNET SPLITTER

                    

The eNET splitter separats base-band POTS or ISDN signals from high-pass ADSL signals, thusterminating copper  telephone lines and distributimg POTS/ISDN and ADSL signals.

 

 

 

 

 

 

 

 

This system uses passive ISDN splitter which conforms with ETR 080 ANNEX B (2B1Q line code), as well as with the parameters defined in ETSI TS 101 952-1-3 (2002-05) and TS 101 952-1-4 (2002-11).   

 

Figure 1: Terminating impedances

 

 

 

 

 

 

 

 

Figure 2: Circuit diagram of Zsl(600) and Zadsl-i

 

 

 

 

 

 

 

Table 1: Electrical characteristics of the splitter  


Splitter parameter

Electrical requirements

Range

Values for combinated splitter

Frequency range

LPF bandwith

DC to 80 kHz

HPF bandwith

120 kHz – 2208 kHz

DC requirements

DC series resistance between the A-wire and B- wire at the POTS/ISDN (LINE) port with Line (POTS/ISDN) port shorted

< 12.5 Ω

DC resistance between A-wire and B-wire terminal of the splitter

> 5 MΩ

Terminating impedances

ZADSL = ZADSL-I (does not include the blocking capacitors, CB)

41.8 nF + (100 Ω || 82 uH) + 41.8 nF

ZISDN

135 Ω

ZPOTS

600 Ω

Zline

600 Ω, Zsl(600) acc. to ETSI TS 101 952-1-1 (only for return loss measurements, 135 Ω, 100 Ω)

CB = blocking capacitor

27 nF

Low Pass Filter Passband Loss Requirements between POTS/ISDN port and Line port

Insertion Loss

200 Hz - 3600 Hz

< 1 dB (600 Ω)

Insertion Loss

1 kHz - 40 kHz

< 0.8 dB (135 Ω)

Insertion Loss

40 kHz - 80 kHz

< 2 dB (135 Ω)

Low Pass Filter Stopband Requirements between POTS/ISDN port and Line port

Isolation Loss

150 kHz - 1104 kHz

> 65 dB (100 Ω)

Isolation Loss

1104kHz - 2208 kHz

> 55 dB (100 Ω)

Return Loss requirements for Low Pass Filter on the POTS/ISDN port

Return Loss

300 Hz - 3400 Hz

According to ETSI TS 101-952-1-4 (2002-11) 6.4.1 point, Fig. 9. Zref = Zsl(600) = Zline

Return Loss

1 kHz - 40 kHz

> 16 dB (135 Ω)

Return Loss

40 kHz - 80 kHz

> 14 dB (135 Ω)

Unbalance about earth for Low Pass Filter on the POTS/ISDN port and Line port

Longitudinal Conversion Loss (LCL)

50 Hz – 600 Hz

> 40 dB (600 Ω)

Longitudinal Conversion Loss (LCL)

600 Hz – 3400 Hz

> 46 dB (600 Ω)

Longitudinal Conversion Loss (LCL)

3400 Hz - 4000 Hz

> 40 dB (600 Ω)

Longitudinal Conversion Loss (LCL)

4 kHz - 30 kHz

> 40 dB (135 Ω)

Longitudinal Conversion Loss (LCL)

30 kHz – 1104 kHz

> 50 dB (135 Ω)

Longitudinal Conversion Loss (LCL)

1104 kHz - 5 MHz

> 30 dB (135 Ω)

Delay Distortion for Low Pass Filter between POTS/ISDN port and Line port

Delay Distortion

200 Hz - 600 Hz

< 250 μs (600 Ω)

Delay Distortion

600 Hz – 3200 Hz

< 200 μs (600 Ω)

Delay Distortion

3200 Hz - 4000 Hz

< 250 μs (600 Ω)

High Pass Filter Passband Loss Requirements between ADSL port and Line port

Insertion Loss

120 kHz - 170 kHz

< 3 dB (100 Ω)

Insertion Loss

170 kHz - 1104 kHz

< 1 dB (100 Ω)

          

 

 

 

 

 

 

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
       
 
Address. Hrvatske Mornarice 1F 21000 Split Croatia | Phone. +385 21 32 36 70 | Fax. +385 21 32 36 72