Cisco Systems 3600 Configure Codec and VAD for Dial Peers, Configure Codec for a VoIP Dial Peer

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Optimize Dial Peer and Network Interface Configurations

To generate an SNMP trap message if the reserved QoS is less than the configured value for a selected VoIP peer, use the following commands, beginning in global configuration mode:

Step

Command

Purpose

1

dial-peer voice number voip

Enter the dial-peer configuration mode to

 

 

configure a VoIP peer.

 

 

 

2

acc-qos [best-effort controlled-load

Specify the QoS value below which an SNMP

 

guaranteed-delay]

trap will be generated.

 

 

 

Note RSVP reservations are only one-way. If you configure RSVP, the VoIP dial peers on both ends of the connection must be configured for RSVP.

Configure CODEC and VAD for Dial Peers

Coder-decoder (CODEC) and voice activity detection (VAD) for a dial peer determine how much bandwidth the voice session uses. CODEC typically is used to transform analog signals into a digital bit stream and digital signals back into analog signals—in this case, it specifies the voice coder rate of speech for a dial peer. VAD is used to disable the transmission of silence packets.

Configure CODEC for a VoIP Dial Peer

To specify a voice coder rate for a selected VoIP peer, use the following commands beginning in global configuration mode:

Step

Command

Purpose

1

dial-peer voice number voip

Enter the dial-peer configuration mode to

 

 

configure a VoIP peer.

 

 

 

2

codec [g711alaw g711ulaw g729r8]

Specify the desired voice coder rate of speech.

 

 

 

The default for the codec command is g729r8; normally the default configuration for this command is the most desirable. If, however, you are operating on a high bandwidth network and voice quality is of the highest importance, you should configure the codec command for g711alaw or ulaw. Using this value will result in better voice quality, but it will also require higher bandwidth requirements for voice.

For example, to specify a CODEC rate of G.711a-law for VoIP dial peer 108, enter the following:

dial-peer voice 108 voip destination-pattern +14085551234 codec g711alaw

session target ipv4:10.0.0.8

VC-34Voice, Video, and Home Applications Configuration Guide

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Contents Configuring Voice over IP for the Cisco 3600 Series How Voice over IP Processes a Telephone CallList of Terms Prerequisite Tasks Voice over IP Configuration Task List Configure IP Networks for Real-Time Voice Traffic VC-18Voice, Video, and Home Applications Configuration Guide Configure Multilink PPP with Interleaving Step Command PurposeConfigure RTP Header Compression Multilink PPP Configuration ExampleRTP Header Compression Configuration Example Enable RTP Header Compression on a Serial InterfaceChange the Number of Header Compression Connections Configure Custom Queuing Configure Frame Relay for Voice over IPConfigure Weighted Fair Queuing Frame Relay for Voice over IP Configuration Example Configure Number Expansion Create a Number Expansion TableConfigure Number Expansion Shows the number expansion table for this scenarioConfigure Dial Peers Inbound versus Outbound Dial PeersInbound versus Outbound Dial Peers Create a Peer Configuration Table CodecOutbound Dialing on Pots Peers Configure Pots PeersDirect Inward Dial for Pots Peers Incoming and Outgoing Pots Call Legs Configure VoIP Peers Troubleshooting Tips Optimize Dial Peer and Network Interface ConfigurationsConfigure IP Precedence for Dial Peers Validation TipsConfigure Rsvp for Dial Peers Configure Codec and VAD for Dial Peers Configure Codec for a VoIP Dial PeerConfigure Voice over IP using a Trunk Connection Configure VAD for a VoIP Dial PeerVC-36Voice, Video, and Home Applications Configuration Guide Configure Voice over IP for Microsoft NetMeeting Configure a Trunk ConnectionVoice over IP Configuration Examples FXS-to-FXS Connection Using RsvpConfiguration for Router RLB-1 FXS-to-FXS Connection ExampleVC-40Voice, Video, and Home Applications Configuration Guide Configuration for Router RLB-w Configuration for Router R12-eConfiguration for Router RLB-2 Configuration for Router SJ Linking PBX Users with E&M Trunk LinesConfiguration for Router SLC Pstn Gateway Access Using FXO Connection Pstn Gateway Access Using FXO Connection ExamplePstn Gateway Access Using FXO Connection Plar Mode Pstn Gateway Access Using FXO Connection Plar ModeConfiguring Voice over IP for the Cisco 3600 Series VC-47 VC-48Voice, Video, and Home Applications Configuration Guide
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3600 specifications

Cisco Systems 3600 is a high-performance modular router series designed for small to medium-sized enterprises and branch offices. Launched in the late 1990s, it has been widely recognized for its flexibility, scalability, and reliability. The series is part of Cisco's extensive networking portfolio and has played a vital role in delivering various services and applications while enhancing operational efficiency.

One of the main features of the Cisco 3600 series is its modular architecture, allowing organizations to customize the router according to their specific needs. The system supports various interface modules that can accommodate different types of connections, including serial, Ethernet, and DSL, which helps in building versatile network solutions. The modularity not only increases the router’s lifespan by enabling upgrades as technology changes but also supports future expansion as the organization grows.

The Cisco 3600 series routers utilize advanced routing protocols, such as RIP, OSPF, EIGRP, BGP, and IS-IS, to ensure efficient data transmission and optimal network performance. This capability allows the routers to adapt to varying traffic demands and complexities, thereby optimizing bandwidth utilization and reducing latency in communications. With extensive memory options, including Flash and DRAM, the 3600 series can handle robust data processing and support intricate routing environments.

Security is another critical feature of the Cisco 3600 series. It includes support for VPNs, firewalls, and other security protocols, providing a secure environment for data transfer. The implementation of features like Access Control Lists (ACLs) and Intrusion Detection Systems (IDS) enhances the overall security posture, making it suitable for organizations looking to protect their sensitive information.

In terms of scalability, Cisco 3600 routers can easily accommodate increased workloads and network growth. This is done through the provision of additional modules and cards to increase capacity and performance. The series can also support multiple WAN connections, enabling seamless integration with various telecommunication services.

Additionally, the Cisco 3600 series is designed for ease of management. Utilizing Cisco's IOS software, network administrators can manage and configure the routers efficiently, thanks to a user-friendly interface and extensive command capabilities. This makes troubleshooting simpler and ensures network availability remains high.

In conclusion, Cisco Systems 3600 series routers combine robust performance, security features, and scalability, making them an invaluable asset for businesses looking to maintain a reliable and efficient networking solution.