This part is a kind of semiconductor called JA7052.

Function of this product has ADSL LINE TRANSFORMER.

Manufacturers : JQL

Image and pinout :

Some of the text within the PDF file :

ADSL LINE TRANSFORMER P/N: JA7052 DATA SHEET A. General Specifications 1.ADSL line Transformer For BROADCOM Project (CPE SMD EP13) B. Electrical Specifications@25°C(Operating Temperature:-40℃~85℃) OCL: (16-9)Tie11+14: 400uH±5% @10KHz 100mV LL: (1-4) Tie2+3,5+6+7+8,16+11+14+9: 20uH Max @100KHz 100mV LL: (5-8)Tie6+7,1+2+3+4,16+11+14+9: 3uH Max @100KHz 100mV CWW: (1-16)Tie1+2+3+4,9+11+14+16 : 15pF Max @100KHz 100mV CWW: (5-16)Tie5+6+7+8,9+11+14+16 : 20pF Max @100KHz 100mV CWW: (1-5)Tie5+6+7+8,1+2+3+4: 40pF Max @100KHz 100mV DCR : (16-9)Tie11+14: 0.6 Ω Max (1-4)Tie2+3: 1.1 Ω Max (5-8)Tie7+6: 0.4 Ω Max T/R : (16-9:5-8)tie11+14,7+6: 4.25:1±5% (16-9:1-4) tie11+14,3+2: 1:1±5% HIPOT: PRI-SEC 1500Vrms 1mA 60Sec C. Schematic & Mechanical :. 13.0TYP 11.9 1 [ ... ]

JA7052 PDF Datasheet Download