Agere Systems L56xAF (Apollo)

Chipset data:

Agere Systems formerly Lucent Technologies, datasheet
ISA bus controllerless (HCF) modem
Linux support
Agere/Lucent has not released an official Linux driver for the Apollo chipsets.
However, they do supply proprietary code in kit form to the volunteer developers.

Volunteer "Linmodem" project: LTModem Drivers for Linux
  L56DAS  = DSP1643 (BQFP) + CSP1034AH (MQFP) + T7525  (Desktop)
  L56DASI = DSP1644        + CSP1034AH (MQFP) + T7525  (Desktop)
  L56LAS  = DSP1643 (TQFP) + CSP1034AH (TQFP) + T7525  (Laptop)
  L56LASI = DSP1644        + CSP1034AH (TQFP) + T7525  (Laptop)
  L56xAFI = DSP1644        + CSP1034AH        + T7525  ("Apollo-IV")
  L56xAF  = DSP1643        + CSP1034AH        + T7525 [+optional PNP1A]

  1034AH   Line Codec                      44-pin MQFP or  48-pin TQFP
  1643     Apollo Data/Fax/TAM/FDSP       132-pin BQFP or 128-pin TQFP
  1644     Apollo Data/Fax/TAM/FSDP/PnP   144-pin TQFP
  PNP1A                                   100-pin MQFP
  T7525    Audio Codec                     28-pin SOJ [SSOP]
  TFQP=Thin Quad Flat Package
1643 DSP package 1034AH codec package 1034AH-J codec package
Rob Clark