Voice over IP Configuration Task List
To configure Voice over IP on the Cisco 3600 series, you need to complete the following tasks:
1Configure IP Networks for Real-Time Voice Traffic
Configure your IP network to support real-time voice traffic. Fine-tuning your network to adequately support VoIP involves a series of protocols and features geared toward Quality of Service (QoS). To configure your IP network for real-time voice traffic, you need to take into consideration the entire scope of your network, then select and configure the appropriate QoS tool or tools:
(a)Multilink PPP with Interleaving
(b)RTP Header Compression
(c)Custom Queuing
(d)Weighted Fair Queuing
Refer to “Configure IP Networks for Real-Time Voice Traffic” section for information about how to select and configure the appropriate QoS tools to optimize voice traffic on your network.
2Configure Frame Relay for Voice over IP
(Optional) If you plan to run Voice over IP over Frame Relay, you need to take certain factors into consideration when configuring Voice over IP for it to run smoothly over Frame Relay. For example, a public Frame Relay cloud provides no guarantees for QoS. Refer to the “Configure Frame Relay for Voice over IP” section for information about deploying Voice over IP over Frame Relay.
3Configure Number Expansion
Use the num-expcommand to configure number expansion if your telephone network is configured so that you can reach a destination by dialing only a portion (an extension number) of the full E.164 telephone number. Refer to the “Configure Number Expansion” section for information about number expansion.
4Configure Dial Peers
Use the dial-peer voice command to define dial peers and switch to the dial-peer configuration mode. Each dial peer defines the characteristics associated with a call leg. A call leg is a discrete segment of a call connection that lies between two points in the connection. An end-to-end call is comprised of four call legs, two from the perspective of the source access server, and two from the perspective of the destination access server. Dial peers are used to apply attributes to call legs and to identify call origin and destination. There are two different kinds of dial peers:
(a)POTS—Dial peer describing the characteristics of a traditional telephony network connection. POTS peers point to a particular voice port on a voice network device. To minimally configure a POTS dial peer, you need to configure the following two characteristics: associated telephone number and logical interface. Use the destination-patterncommand to associate a telephone number with a POTS peer. Use the port command to associate a specific logical interface with a POTS peers. In addition, you can specify direct inward dialing for a POTS peer by using the direct-inward-dialcommand.
