This part is a kind of semiconductor called LAF0001.

Function of this product has Pots Splitter.

Manufacturers : Linkcom

Image and pinout :

Some of the text within the PDF file :

R LAF0001 POTS SPLITTER    !"                   !    DIMENSIONS [ m / m ] ADSL Splitter LINE ÁÂÃÄÅÆ Model: LAF0001 MODEM ÅÅÃÂÅÆÇÃ ÅÅÃÂÅÆÇÃ ÄÂÅÇÁÁÁ !ÂÃÄÈ ÅÅÃÂÅÆÇÃÆ"ÅÇ ÅÆÇÃ ÅÅÃÂÅÆÇÃÆ"ÅÇ ÅÆÇÃ ÆÃ" ÅÆÇÃÇ"" ÇÃ#ÆÅÂÆÃ$ÃÄ Ä ÅÂ ÃÇ"" ÅÆÉ% ÆÃ#ÅÇ# ÇÂÃÄ ÄÄÂ ÃÅÄ ÈÆÃ#ÄÉÄÆÅÈ ÈÆ"ÅÇ ÅÆÇÃ ÈÆ"ÅÇ ÅÆÇÃ PHONE ÁÂ ÁÂ ÁÂÃÄÅÆÇÃ ÉÇÃ ÆÃ Ç ÁÂÃ Ã ÄÂÅ ÁÂÃ Ã ÄÂÅ ÁÂÃ Ã ÄÂÅ ÅÈÉ ÉÆÃÃ Æ ÇÈ Æ ÇÈ Æ ÇÈ     ÁÂÃÄÅ [ ... ]

LAF0001 PDF Datasheet Download