Next-generation switches have been purpose-built with open interfaces that allow these platforms to exist in a variety of network deployments (see Figure 7). Next-generation switches can serve as the following:

• an alternative to traditional Class-5, end-office switches
• an alternative to traditional Class-4, tandem-office switches
• enhanced services platforms
• wireless local access switches and base station controllers
• cable telephony head end switches

Figure 7. Next-Generation Switches in a Variety of Network Deployments