![](../../_themes/blueprnt/blubul1a.gif) | First Generation
![](../../_themes/blueprnt/blubul2a.gif) | Switches (Enterprise and carrier), Access Switches / Muxes, Voice Frads, Gateways, & Routers
![](../../_themes/blueprnt/blubul2a.gif) | Stable, commodity implementations
![](../../_themes/blueprnt/blubul2a.gif) | Proprietary to some degree (varies by product)
![](../../_themes/blueprnt/blubul2a.gif) | Single technology focus
![](../../_themes/blueprnt/blubul3a.gif) | Voice over IP (Routers and Gateways)
![](../../_themes/blueprnt/blubul3a.gif) | Voice over Frame Relay (Voice Frads)
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![](../../_themes/blueprnt/blubul2a.gif) |
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