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There are two methods supported by the IMG 2020 to interwork Called Party Number digits between SIP & SS7. One method labeled Enbloc requires that all the Destination address information be included in the IAM or INVITE. The other method is Overlap. The IMG 2020 supports both Overlap Sending and Overlap Receiving. In these methods, the destination address is contained in the IAM message as well as the subsequent SAM sequence of messages. The IMG 2020 creates a series of INVITES. Each invite contains one or more destination address digits. The received digits are buffered until the configured minimum number of digits is received at which point the outgoing call is made with the destination address Enbloc. Refer to the Overlap Signaling (Receiving) topic.
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