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,

ISBN-10: 158705258X

ISBN-13: 9781587052583

Cisco Voice Gateways and Gatekeepers presents precise strategies to real-world difficulties encountered while imposing a VoIP community. each one bankruptcy provides an outline of a know-how via an in depth state of affairs and linked recommendations. Emphasis is put on the authorized most sensible practices and customary concerns encountered. it is going to first and foremost serve readers as a reference for advanced gateway and gatekeeper deployments and also will be a beneficial learn relief for the Cisco Certifified Voice specialist (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 comprises recommendation on while to take advantage of every 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 simple and complex 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 surroundings. half 5 addresses use of the Cisco device Command Language (TCL). This publication is usually prompt self-study education for the CCVP GWGK examination.

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The following line shows out-of-band DTMF relay: mgcp dtmf-relay voip codec all mode out-of-band You must also configure the CallManager to support the type of DTMF relay you choose. 54 Part II: Gateways Part II: Gateways 55 Securing MGCP Gateways An MGCP gateway is part of your IP network and should conform to your company security policy with user control and authentication, access control lists, and physical security applied to it. A voice gateway functioning as a WAN gateway can provide additional network protection with features such as IOS firewall or IPS, depending on your company policy.

If you will use the router in SRST mode, you might need other configurations to emulate CallManager capabilities. Chapter 13, "SRST and MGCP Gateway Fallback," details these. 46 Part II: Gateways Part II: Gateways 47 Implementing MGCP Gateways Basic implementation of an MGCP gateway involves enabling MGCP on the gateway, telling the gateway how to find the CallManagers, and then adding the gateway and its endpoints to the CallManager configuration. You have a choice of doing all of configuration manually or downloading a good part of it from CallManager.

QSIG functionality When connecting to a PBX using QSIG, MGCP BRI/PRI Backhaul enables the decoding of facility IE messages by the CallManager. Calling name and redirect number, which are carried in the facility IE, are therefore available only when using MGCP trunks. You might need this function for voice-mail access. ) Cons MGCP cons are as follows: • Dependence on call agent The lack of call intelligence on the gateway means that it must depend on a call agent, and network administrators must make backup plans in case the call agent becomes 38 Part II: Gateways Part II: Gateways 39 unavailable.

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