Longitudinal balance of POTS splitter : The balance is greater than 58 dB for frequency between 200 Hz - 1 kHz with a straight line-level decreasing to 53 dB at 3 kHz.
Metering Pulse : The metering pulse after passing through DSLAM is available at the interface with frequency 16 KHz ± 1%. The distortion is not more than 10% and the level is minimum 500 mV rms ± 10%. The interface will work independent of polarity reversal.
Connectors PSTN Line : The PSTN line is the PIJF cable with 0.5 copper pairs.
Isolation : Isolation resistance between tip, ring and between earth = 10 Mega-ohms. Isolation resistance with line port = 10 Mega-ohms.
ADSL-band Return Loss : The return loss caused by loading the low-pass filter in the band from 25 kHz to 1104 kHz against the reference impedance of 100 ohms is greater than 14dB.
Unbalance about earth : : 25Hz-50 Hz > 40 db terminated with 600hms.50Hz- 600 Hz > 46 db terminated with 600 Ohms.600Hz-3400Hz > 52db terminated with 600ohms.
The ringing voltage : Generated / detected at the subscriber unit is at least 40 V rms with frequency as 25 +/ - 3Hz. The Ringing voltage is generated by the DSLAM is 75V rms with frequency as 25 + / - 3Hz
Insertion Loss : The tele-port to Line port insertion loss is < 1 db at 1 KHz for 600 Ohms.
Loop Current : The maximum loop current drawn from exchange is less than 60 mA.
Longitudinal balance : The longitudinal balance at ATU-C and ATU-R is greater than 40 dB over the 5 kHz to 1104 kHz frequency range.•DC characteristics