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300-820 · Question #183

In Cisco Expressway, which information from an incoming search request does the pre-search transform configuration allow to be modified?

The correct answer is B. called address. Pre-search transforms in Cisco Expressway allow the destination address (called address) of an incoming search request to be modified before the search is performed.

Initial Expressway Configurations

Question

In Cisco Expressway, which information from an incoming search request does the pre-search transform configuration allow to be modified?

Options

  • Acalling party
  • Bcalled address
  • CSource IP address
  • DCLID

How the community answered

(37 responses)
  • A
    3% (1)
  • B
    86% (32)
  • C
    8% (3)
  • D
    3% (1)

Why each option

Pre-search transforms in Cisco Expressway allow the destination address (called address) of an incoming search request to be modified before the search is performed.

Acalling party

The calling party identity is not modified by pre-search transforms; transforms specifically target the destination (called) address, not the source.

Bcalled addressCorrect

Pre-search transforms operate on the alias or URI in the called address field of a search request, allowing Expressway to rewrite the destination before any zone search or dial plan lookup begins. This enables number normalization, domain replacement, or prefix stripping before routing decisions are made.

CSource IP address

Source IP address is a network-layer attribute that is not accessible or modifiable by Expressway dial plan transforms.

DCLID

CLID (Calling Line Identification) is a telephony presentation attribute handled separately from dial plan transforms and is not within the scope of pre-search transform configuration.

Concept tested: Expressway pre-search transform modifying called address

Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/admin_guide/X14-3/exwy_b_cisco-expressway-administrator-guide/exwy_m_dial-plan-overview.html

Topics

#Cisco Expressway#Pre-search transform#Called address#SIP/H.323 routing

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