The blacklist represents itself a list or register of entities which are denied privileges, service, mobility, access and admission due to these or other reasons. This function blocks all connections from the subscribers who are in the list.
Cisco SPA525G is a high-tech IP-phone, designed to work in conjunction with five lines. This phone is equipped with a large color LCD display with a diagonal of 3.2 "and refers to telephones of business class. If your company is using all the advantages of modern IP-telephony, this device will be the best choice.