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Home Products DSL ADSL Splitters CPE ADSL Splitter for ADSL over ISDN

CPE ADSL Splitter for ADSL over ISDN

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ALS-10-EU/ISDN CPE ADSL Splitter for ADSL over ISDN

CPE ADSL Splitter for ADSL over ISDN

The ALS-10-EU/ISDN is a low-cost, compact, low pass filter designed for ISDN-BA with 2B1Q or 4B3T baseband line codes coinciding with ADSL signals. It integrates a low pass filters that block the high frequency energy from reaching the ISDN-BA device and provides isolation from impedance effects of the ISDN-BA device on the ADSL modem. Because the ISDN splitter connects directly to the subscriber loop media, it must also provide some protection for externally induced line hits or faults which could damage to any attached equipment or endanger humans interacting with the installed equipment. The circuit protection will be provided mostly by standard central office line protection means and additional protection measures built into splitter to protect against line overstress which could damage the splitter itself. The electrical and transmission specifications are based on ETSI TS 101 952-1-3 V1.1.1 for ISDN-BA requirements.


  • Compact size
  • Consists exclusively of all passive elements
  • Designed for implementation of ADSL/VDSL CPE application
  • Handles all ISDN loop current from 0 ~ 60mA
  • If the power of ATU-R fails, telephone service on the ADSL line will operate normally
  • Provides excellent isolation between DSL and ISDN
  • The ISDN splitter and Low-pass filter provide RJ-11 connectors for ATU-R/VTU-R and ISDN interfaces


Standard: ETSI TS 101-952-1-3 V.1.1.1; Annex E.2 of ITU-T G.992.1
Impedance: 135 / 150 ohms
Isolation: Wire A to B: 5.0M ohms
Insertion loss:

1 ~ 40KHz : 0.8dB
40 ~ 80KHz : 2dB
1 ~ 60KHz: 1.2dB
60 ~ 80KHz: 2dB

Insertion loss in ADSL band: 150 ~ 1104KHz: 65dB
Insertion loss between ADSL port to line port: 120 ~ 170KHz : 2dB; 170 ~ 1104KHz: 1dB
Return loss at ISDN:

1 ~ 40KHz : 16dB
40 ~ 80KHz: 14dB
1 ~ 60KHz : 16dB
60 ~ 80KHz: 14dB

Unbalance to earth: 300 ~ 30KHz: 40dB; 30 ~ 1104KHz: 46dB; 1104KHz ~ 3MHz:40dB
Delay Distortion: 300 ~ 80KHz: 20us
DC Resistance: 12.5 ohms
Dimensions: 86 x 56 x 26mm (D x W x H)
Weight: 70g
Temperature: -10~70°C (Operating) ,-15~80°C (Storage)
Humidity: 10~90% non-condensing