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Overview/Description
To integrate VoIP networks into existing voice networks, you must have the skills and knowledge to implement call routing and design an appropriate numbering plan. A scalable numbering plan establishes the baseline for a comprehensive, scalable, and logical dial plan. This course describes call routing principles, discusses attributes of numbering plans for voice networks, addresses the challenges of designing these plans, and identifies the methods of implementing numbering plans. A dial plan is the central part of any telephony solution and defines how calls are routed...
Overview/Description
This course describes how to configure the Skinny Client Control Protocol (SCCP) and Session Initiation Protocol (SIP) endpoints in the Cisco Unified Communications Manager Express. The SCCP endpoints are defined as the Ethernet phones (ephones) and have SCCP directory numbers (ephone-dns) associated with them. The SIP endpoints are defined as voice register pools and have SIP directory numbers (voice register directory numbers) associated with them. This course discusses the various types of directory numbers available for Cisco Unified IP phones using either SCCP or SIP...
Overview/Description
Cisco Unified Communications Manager Express provides call processing for Cisco Unified IP phones for small-office or branch-office environments. It enables the large portfolio of Cisco integrated services routers to deliver unified communications features that are commonly used by business users to meet the voice and video communications requirements of the small or medium-sized office. Cisco Unified Communications Manager Express allows the deployment of a cost-effective, highly-reliable communications system using a single device with Cisco IOS Software. This course...
Overview/Description
Queuing algorithms are one of the primary ways to manage congestion in a network. Network devices manage an overflow of arriving traffic by using a queuing algorithm to sort traffic and determine a method of prioritizing the traffic onto an output link. Traffic policing controls the maximum rate of traffic that is sent or received on an interface. Traffic policing is used on interfaces at the network edge to limit traffic into or out of the network. Traffic shaping controls outgoing traffic on an interface to match the transmission rate to the speed of the remote end,...
Overview/Description
Gatekeepers play a major part in medium and large H.323 VoIP network solutions. Gatekeepers allow for dial-plan scalability and reduce the need to manage global dial plans locally. This course describes the functions of a gatekeeper and explains how to configure gatekeepers to interoperate with gateways. It also gives an overview of the Cisco Unified Border Element and describes how to implement a Cisco Unified Border Element within an enterprise network. A Cisco Unified Border Element has the ability to interconnect voice and VoIP networks, offering protocol interworking...
Overview/Description
Cisco voice gateway relays high quality voice and fax traffic across an IP network. This course describes the operational modes of a voice gateway and how it fits in the Cisco Unified Communications architecture. It explains the voice gateway functions in each Cisco Unified Communications deployment model and the call legs that are associated with each operational mode. A primary function of the Cisco Unified Communications gateways is to route calls. The process of call routing includes the processing of incoming and outgoing call legs. This course also describes how...
Overview/Description
Path selection is one of the most important aspects of a well-designed VoIP system. High availability is desirable so that there is usually more than one path for a call to take to its final destination. Multiple paths provide several benefits, including redundancy in case of a link failure or insufficient resources on that link and a reduction in toll costs of a call. This course introduces the path selection strategies and methods to implement them. Calling privileges on Cisco IOS gateways are dial plan components that define the types of calls that a phone, or group...
Overview/Description
IP networks must provide a number of services to adequately support voice transmission using VoIP. These services include security, predictability, measurability, and some level of delivery guarantee. Network administrators and architects achieve this service level by managing delay, delay variation (jitter), bandwidth provisioning, and packet loss parameters with quality of service (QoS) techniques. This course introduces the concept of a converged network, identifies four problems that could lead to poor quality of service, and describes solutions to those problems. It...
Overview/Description
Session Initiation Protocol (SIP) is one of the most important voice signaling protocols within service provider VoIP networks and is supported by most IP telephony system vendors. As such, it is an ideal protocol for interconnecting different VoIP systems and networks. An understanding of the features and functions of SIP components, and the relationships that the components establish with each other, is important in implementing a scalable, resilient, and secure SIP environment. This course describes how to configure SIP. It explores the features and functions of the...
Overview/Description
H.323 gateways are among the most common Cisco IOS voice gateways within Cisco Unified Communications Manager environments. H.323 gateways are the endpoints on a LAN that provide real-time, two-way communications between H.323 terminals on the LAN and other ITU-T terminals on the network. H.323 gateways can also communicate with other H.323 gateways. Gateways enable H.323 terminals to communicate with terminals that are not H.323 terminals by converting protocols. Gateways are the point where a circuit-switched call is encoded and repackaged into IP packets. Because...
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