What is the purpose of a transform in the Expressway server?

Question

Options

• AA transform has the function as a neighbor zone in the Expressway. It creates a connection
• BA transform changes the audio codec when the call goes through the Expressway.
• CA transform is used to route calls to a destination.
• DA transform changes an alias that matches certain criteria into another alias.

• A
  6% (2)
• C
  3% (1)
• D
  90% (28)

Explanation

A transform in Expressway is a pre-processing rule that rewrites or manipulates a dial string (alias or URI) before the search rules evaluate it for routing. When an alias matches a defined pattern (using regex), the transform replaces it with a new alias according to a replacement string. For example, a transform can rewrite '[email protected]' into '[email protected]' before routing logic runs. Transforms do not establish connections (that is a zone's role), do not change audio codecs (that is a transcoder's role), and are not routing decisions themselves-they simply mutate the alias so that a subsequent search rule can correctly route the rewritten alias.

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