Guiding principle for cooperation with customers in Premium Plus standard is the highest quality of service. The offer provides CLI, roaming, the ability to send faxes, and the best parameters of ASR and ACD. It guarantees total elimination of FAS. Customer has choice offered by 4carriers PREMIUM PLUS contact technology (TDM, IP network through best telecom operators. Offer is realized in cooperation with the individually-selected partners, directed primarily towards carriers cooperating with corporate customers and mobile network operators.