Understanding IP private branch exchange (PBX)

Private branch exchanges (PBXs) handle call switching and routing within an organization, and IP PBX systems are the next generation of Internet-based PBX communications.

To provide the cost savings of IP-based phone calls for small companies, But as the organization grows, users will want to look at more sophisticated options, the same as if using a public switched telephone network (PSTN).

Medium- to large-sized businesses have long used private branch exchange (PBX) switchboards to route incoming calls from a number of external lines among a larger number of internal lines. This saves money because there’s no need to have a separate line for every employee, and makes line sharing more efficient. Most systems in use today are technically PABX, which means the call routing is automated, rather than dependent on a human switchboard operator.

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