Glossary

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Term	Use it this way
CSS	An ordered list of partitions. Line CSS is consulted before device CSS.
Partition	A bucket of patterns. Order inside the CSS decides which bucket is searched first.
Dial-peer 0	No inbound peer you configured matched.
Early offer	SDP in the INVITE.
Delayed offer	SDP in the 200, answer in the ACK.
B2BUA	Two legs. CUBE is one. Read both.
ELIN	The callback number that should return to the site that dialed emergency services.
Call type	In UCCE, the object the dialed number selects and the bucket CUIC reports.
EF / 46	The DSCP commonly used for voice RTP. A queue still has to honor it.
SIPREC	RFC 7866 recording session from an SBC to a recorder.