300-070 · Question #182
An engineer configures a router with an ISDN PRI connection that only contains two dial peers as follows: dial-peer voice 10 pots destination-pattern 9T port 0/0/0:23 dial-peer voice 100 voip…
The correct answer is C. dial-peer voice 1 pots. The router has an outbound POTS dial-peer (10) matching '9T' on port 0/0/0:23 for PSTN egress, and a VoIP dial-peer (100) matching '45..' pointing to an IP destination. When an inbound PSTN call arrives for extension 4510, the router needs an inbound POTS dial peer to receive…
Question
An engineer configures a router with an ISDN PRI connection that only contains two dial peers as follows:
dial-peer voice 10 pots destination-pattern 9T port 0/0/0:23 dial-peer voice 100 voip destination-pattern 45.. session target ipv4:10.2.10.1 When an inbound call is placed from the PSTN to extension 4510, a dial tone is heard. Which additional dial peer is needed to allow the call to terminate directly to the internal number?
Options
- Adial-peer voice 1 pots
- Bdial-peer voice 1 pots
- Cdial-peer voice 1 pots
- Ddial-peer voice 1 pots
How the community answered
(50 responses)- A16% (8)
- B8% (4)
- C72% (36)
- D4% (2)
Explanation
The router has an outbound POTS dial-peer (10) matching '9T' on port 0/0/0:23 for PSTN egress, and a VoIP dial-peer (100) matching '45..' pointing to an IP destination. When an inbound PSTN call arrives for extension 4510, the router needs an inbound POTS dial peer to receive the call from the PRI and hand it off. Without a matching inbound dial peer, the router answers with dial tone (default behavior when no inbound dial peer matches). The correct missing dial peer (Option C) must be a POTS type with an 'incoming called-number' pattern that matches 4510, allowing the router to bridge the inbound PSTN call to the VoIP dial-peer 100 for delivery to 10.2.10.1.
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