You should not have problems, all the vendors designs their products following the ITU, ETSI, ANSI standards, is important to have clear idea of what kind of standar you have to use to accomplish your needs, a good example is the one sid by VERMA, other example is for example in México where per regulatory ISUP is mandatory tehrefore all the vendors has to fine their ITU standard to cover regulatory issues, finally there are many kind of switches, carriers but not problems working among them.