To enable incoming calls to intra-office users are routed through a SIP trunk, which of the following parameters must be set on the U1900 series unified gateway? (Multiple Choice)

Question

Options

• AOffice route and office route selection code of the SIP trunk
• BOutgoing call prefix
• CPeer IP address and port number of the SIP trunk
• DIntra-office call prefix

• A
  100% (15)

Explanation

All four options are required because each addresses a distinct layer of SIP trunk call routing on the U1900: Option A (office route and selection code) defines which trunk path to use and how it's identified; Option B (outgoing call prefix) tells the gateway how to format and strip digits when sending calls out over the SIP trunk; Option C (peer IP address and port) establishes the physical SIP signaling connection to the remote endpoint; and Option D (intra-office call prefix) identifies which dialed numbers should be treated as internal extensions, ensuring the gateway knows to route those calls through the trunk rather than elsewhere.

Since every option is correct, there are no distractors - this is a "select all that apply" question where omitting any parameter would leave the configuration incomplete and calls would fail or misroute.

Memory tip: Think of it as four layers - Identity (A: route name/code), Formatting (B: outgoing prefix), Transport (C: IP/port), Classification (D: intra-office prefix). A SIP trunk needs all four: where to go, how to dial, how to connect, and what counts as internal.

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