Download Cisco Voice Gateways and Gatekeepers by David Mallory, Ken Salhoff, Visit Amazon's Denise Donohue PDF

By David Mallory, Ken Salhoff, Visit Amazon's Denise Donohue Page, search results, Learn about Author Central, Denise Donohue,

Cisco Voice Gateways and Gatekeepers offers specified suggestions to real-world difficulties encountered while enforcing a VoIP community. every one bankruptcy provides an outline of a expertise by way of an in depth situation and linked ideas. Emphasis is put on the authorized most sensible practices and customary matters encountered. it's going to in the beginning serve readers as a reference for complicated gateway and gatekeeper deployments and also will be a beneficial learn reduction for the Cisco Certifified Voice expert (CCVP) certification music. Cisco Voice Gateways and Gatekeepers is split into 5 sections. half one offers an advent to the jobs of either gateways and gatekeepers and contains suggestion on whilst to take advantage of each one. half makes a speciality of deploying gateways; operating with MGCP, H.323, and SIP; connecting to the PSTN, PBXs, and the IP WAN; configuring uncomplicated and complicated dial friends; and enforcing SRST. half 3 makes a speciality of deploying and configuring gatekeepers. half 4 discusses use of gateways and gatekeepers in a merchant atmosphere. half 5 addresses use of the Cisco device Command Language (TCL).

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S0 is the slot number that contains the voice module. • SU0 (for Subunit 0) is the slot within the network module that holds the voice interface card (VIC) or voice/WAN interface card (VWIC). • 1 is the number of the voice port on the VIC or VWIC. • VoiceGW is the hostname of the gateway. com where • S0 is the slot number that contains the voice module. • ds1 means that the trunk type is a DS-1. Other trunk type values include ds3, e1, and e3. • -0 is the port number within the slot. • 1 identifies ISDN B-channel number 1.

Added functionalities are described as packages. In Chapter 8, "Connecting to an IP WAN," the section on WAN security describes the Secure Real-Time Protocol (SRTP) package that you can use to encrypt voice traffic. Other packages include capabilities for Real-Time Protocol (RTP), trunks, dual tone multifrequency (DTMF) tones, and announcement servers. You can see the full list in the output of the global configuration command mgcp package-capability ?. When you are using an MGCP gateway, all the dial plan knowledge resides on the CallManager.

The EndpointConfiguration (EPCF) command instructs the gateway about configuration to be applied to the endpoint. The gateway initiates a RestartInProgress (RSIP) message to the CallManager when an endpoint or group of endpoints are going out of or coming into service, or when the gateway will restart. Three types of restarts exist: • Graceful The restart is delayed to allow any existing connections to finish their calls. • Forced This restart occurs immediately, and all connections are lost. • Restart The gateway itself is going to reboot.

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