Dupaco Community Credit Union serves the employees of the Dubuque Packing company. Dupaco's credit union's growing number of branch offices demanded a more feature-rich call routing system - one that could also be modified quickly and easily. In addition, the PBX's desktop management and reporting capabilities were difficult to use. Dupaco decided to use CUIC in conjunction with its existing PBX. It also made this decision to take advantage of CUIC's session initiation protocol (SIP) support. SIP is an emerging standard for IP telephony designed as a simpler, more open and flexible alternative to its predecessor, H.323 - still used today by the majority of voice over IP (VoIP) vendors.
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