Here, I found .debs, this could be easy(?) to integrate:

LTModem Drivers for Linux, "for so called Winmodems with Lucent Apollo (ISA) and Mars (PCI) chipsets. (...) The core communications code of these kits is the property of Agere Systems, Inc. (formerly known as Microelectronics Group of Lucent Technologies). The driver was developed and is maintained by Soumyendu Sarkar at Agere Systems" http://www.physcip.uni-stuttgart.de/heby/ltmodem/