Counterpath X-Lite is free SIP based softphone that is pretty popular. The X-Lite is a stripped down version of the premium SIP solutions offered by the same company. X-Lite is available for GNU/Linux as well but only as a 32bit binary. Recently one of our customers walked in with X-Lite software and a 64bit Arch Linux installation requesting us to set up the 32bit X-Lite soft phone on the 64bit machine. The following steps describe how we did it on Arch Linux. It should work fine on any other 64bit GNU/Linux distributions with minor variations.