ASAP Purchasing is a leading supplier of Cortelco obsolete computer hardware parts and networking components. We specialize in providing immediate quotes for Cortelco part number C56P, Entry Level (2 Sip) 4 Dss With Display .. Our sales team is dedicated to fulfilling your order requirements for Cortelco C56P and will contact you shortly with a response after receiving your quote request. We are available 24/7 to assist with all your parts requirements, including targeted pricing and order-fulfillment date.