In the Houston TX area and world wide The Grandstream UCM series phone system has been an industry disrupter since they first day of release. Houston Business Phone Systems have been right there since day one leading the charge selling and servicing the UCM series PBX Phone Systems. With feature such as PMS integrations, hotel module, voice to email and much more this is a small business phone system fit for any businesses needs. Give us a call now in Houston TX for a business phone system consultation..