Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 104)

Chapter 4 Gateway Selection

Site-Specific Gateway Requirements

4-10

Cisco IP Telephony Network Design Guide

78-11103-03

• Is direct inward dialing (DID) required?

DID is a private branch exchange (PBX) or Centrex feature that permits

outside calls to be placed directly to a station line without use of an operator.

• Is calling line ID (CLID) needed?

CLID is a

service available on digital telephone networks that tells the called

party which number is calling. The central office equipment identifies the phone

number of the caller, enabling information about the caller to be sent along with

the call itself. CLID is synonymous with ANI (automatic number identification).

• Is fax relay needed?

• What type of network management interface is preferred?

• To which country will the hardware be shipped?

• Is rack space available for all needed gateways, routers, and switches?

Although this feature list could be much longer, it provides a starting point to help

narrow the possible choices. Once the features have been defined, a gateway

selection can be made for configurations ranging from single-site enterprise

systems of various sizes and complexities to multisite enterprise systems. These

categories are defined in more depth in the following sections.

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 104