ATIS, SIP Forum Unveil Code 603+ Standard

ATIS and the Session Initiation Protocol Forum released SIP code 603+ Thursday as a new standard for call blocking notifications (see 2206030050). It "balances the need to provide legitimate callers with a mechanism to seek redress if they have been inappropriately blocked against the desire to limit feedback to malicious callers," said ATIS CEO Susan Miller. SIP code 603+ is "the best, shortest and least-costly path to implementation and success," SIP Forum Board Chairman Richard Shockey. The new standard, which was approved Aug. 16, is "primarily developed for, and to be adopted by, US voice service providers," said a report by the groups.