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VoIP Dial Plan Design: Components and Configuration

This article explains the elements of a VoIP dial plan design, including dial plan components, dial peer types, and VoIP configuration commands. It also provides an exercise for configuring the East router.

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VoIP Dial Plan Design: Components and Configuration

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  1. Describe the elements of a VoIP Dial Plan Design

  2. Dial-Plan Components Fundamental VoIP network must have the following features: • Local dial-peers to map phone numbers to a physical port • Network dial-peers to map phone numbers to an IP address • The ability to strip and add digits • Number expansion

  3. Dial Peer Types • POTS or Local Dial Peers - means that the dial peer associates a physical voice port with a local telephone device. • VoIP Dial Peers – On a packet voice network, these dial-peers point to specific devices

  4. Module Objective 5 Configure Voice Interface Cards (VICs) to place VoIP Calls

  5. A Voice Interface Card (VIC)

  6. Various VIC Configurations

  7. Voice Port Numbering Cisco  IOS configuration commands identify voice ports in the form router-slot/voice-slot/VIC-port You can use the show voice port command to show the port numbers of the interface installed on your router.

  8. VoIP Configuration Scenario

  9. Some VoIP Configuration Commands • dial-peer voice • destination-pattern • port • session target

  10. Step1 – Local Dial Peers • To route a received voice call to the right destination, the router needs to know which telephone number belongs to each voice port • If a call comes in for (408) 555-3737, the router needs to know that this telephone is connected to voice port 2/0/0 • To hold this information, Cisco  IOS software uses objects called dial peers

  11. Step2 – Network (VoIP) Dial-Peers • To route a call to the destination telephone over an IP network Commands used: • destination-pattern • session target

  12. Example – West Router POTS Dial Peer config • West(config)# dial-peer voice 401 pots • West(config-dial-peer)# destination-pattern 14085553737 • West(config-dial-peer)# port 2/0/0 • West(config-dial-peer)# exit • West(config)# dial-peer voice 402 pots • West(config-dial-peer)# destination-pattern 14085554141 • West(config-dial-peer)# port 2/0/1 • West(config-dial-peer)# exit

  13. West Router VoIP Dial-Peer • West(config)# dial-peer voice 501 voip • West(config-dial-peer)# destination-pattern 1919958.... • West(config-dial-peer)# session target ipv4:192.168.11.3

  14. Exercise • Write down the config for East router

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