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RFC 5853 is requirements, not a protocol

RFC 5853 collects requirements from SBC deployments. It does not define an SBC wire protocol.

Learn in 5 minutes

  1. Classify RFC 5853 as informational
  2. Name functions operators ask an SBC to perform
  3. Keep those functions separate from SIP methods

Visual

Requirements do not change the ladder · study drawing · cyphermonkeylabs.com AliceSBCBob INVITE 100 INVITE 180 180 200 200 ACK

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RFC 5853 describes deployments. SIP, SDP, and RTP keep their own specifications.

Worked example

Find the protocol Play the ladder. Which start line is an SBC-specific method?

  1. Play the eight hops.
  2. Read each request start line.
  3. List the methods you actually see.

Fault

A trace review rejects a healthy call because no SBC method is present.

The start line is a normal INVITE.

Quiz

RFC 5853 is


Which statement matches the status of an SBC specification?


Call-capacity numbers for an SBC belong in


Topology hiding is best classified as


An OPTIONS keepalive uses


Media transcoding capacity should be taken from


Ecosystem

Glossary, sister systems, and the integration seam for this room.

Workforce management WFM forecasts volume and builds schedules. It consumes contact-center events. It does not parse Via headers. When a forecast is wrong, the SIP symptom is usually queue delay and 480 or carrier congestion, not a broken dialog ID.

Glossary · Ecosystem map · Ports · Troubleshooting

Sources and go deeper