This part is a kind of semiconductor called AS2534EP.

Function of this product has Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping.

Manufacturers : austriamicrosystems AG

Image and pinout :

Some of the text within the PDF file :

Data Sheet AS2533...6 ® Austria Mikro Systeme International AG Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping General Description The AS253x is a CMOS integrated circuit that contains all the functions needed to form a high performance electronic telephone. The device incorporates LD/MF repertory dialling, melody generation, ring frequency discrimination and a high quality line/speech circuit. A RAM is on chip for a 31 digit last number redial and memories (not AS2534) each containing up to 21 digits/ data. The sliding cursor procedure makes the LNR function easy to use under various PABX systems. Also centrex keys (not AS2535) are provided. The device incorporate a volume control for the earpiece. The volume can be controlled by the VOL key (+ 5.4 dB) or by the [ ... ]

AS2534EP PDF Datasheet Download