Which statement about dial-peer matching is true?

Which statement about dial-peer matching is true?

• A. It negotiates the codec between endpoints.
• B. It determines the next hop for a call based on dialed digits and patterns.
• C. It sets the time zone for the call routing.
• D. It stores call detail records after the call.

Answer: (B)

Dial-peer matching is how a gateway decides where to send a call by mapping the number dialed to a specific next hop. When a call is originated or terminated on a gateway, the system compares the dialed digits against each configured dial peer’s destination-pattern. It uses the longest-match rule to choose the best-fitting dial peer, then uses that dial peer’s session target to forward the call to the next hop and apply the associated signaling and media settings. This is the mechanism that directs calls through trunks, gateways, or SIP endpoints. The other ideas aren’t what dial-peer matching does. Codec negotiation happens as part of the call setup (SDP exchange) and is not the primary function of selecting a dial peer. Time zone isn’t a dial-peer consideration, and call detail records are handled by separate call-logging processes, not by the matching logic.

Dial-peer matching is how a gateway decides where to send a call by mapping the number dialed to a specific next hop. When a call is originated or terminated on a gateway, the system compares the dialed digits against each configured dial peer’s destination-pattern. It uses the longest-match rule to choose the best-fitting dial peer, then uses that dial peer’s session target to forward the call to the next hop and apply the associated signaling and media settings. This is the mechanism that directs calls through trunks, gateways, or SIP endpoints.

The other ideas aren’t what dial-peer matching does. Codec negotiation happens as part of the call setup (SDP exchange) and is not the primary function of selecting a dial peer. Time zone isn’t a dial-peer consideration, and call detail records are handled by separate call-logging processes, not by the matching logic.