March 2000 PBL 386 30/2 Subscriber Line Interface Circuit Description The PBL 386 30/2 Subscriber Line Interface Circuit (SLIC) is a 90 V bipolar integrated circuit for use in Digital Loop Carrier, FITL and other telecommunications equipment.
The PBL 386 30/2 has been optimized for low total line interface cost and a high degree of flexibility in different applications.
The PBL 386 30/2 emulates resistive loop feed, programmable between 2x50 Ω and 2x900 Ω, with short loop current limiting adjustable to max 45 mA.
In the current limited region the loop feed is nearly constant current with a slight slope corresponding to 2x30kΩ.
A second lower battery voltage may be connected to the device to...

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