[otrs] OTRS and CRM Software ?

Hi Anyone know if i can use OTRS with CRM Software (SugarCRM or VTiger) ? Actually, i use a old version of SugarCRM and OTRS version 1.1.3 (old too..) but with no link from SugarCRM to OTRS (all ticket are added manually to SugarCRM). Now we want update all and want see if we can use automatiquely OTRS into a CRM Software (we can change SugarCRM to VTiger ..) Thanks for your help