Excalibur provides an end to end business consulting service that offers reliable insight, and expertise in communications and technology. With over 20 years’ experience, Excalibur is the trusted advisor to over 4,000 customers. Our dedicated account management and partnerships with industry leaders ensure that Excalibur is able to offer reliable and flexible business solutions; that provide significant cost savings and increased productivity while improving your customer experience capabilities. Excalibur. Understanding Your Business.