sl-modem-source 2.9.11~20110321-6 (amd64 binary) in ubuntu precise

 This package contains source code for the low-level drivers for the
 software modems produced by Smart Link Ltd. It supports PCI and USB models.
 .
 In addition to this package, you will need the package sl-modem-daemon
 which implements the application part of the driver.
 .
 Module packages can be built for the custom kernel package either by hand or
 using DKMS.