As PCSS is growing we have decided after research to add AT&T Synopse System to our line up. The new Synapse Business Phone System from AT&T is perfect for businesses that need up to 50 extensions. This system is scalable from 1 to 16 outside lines, so as your business grows, your phone system can too. The SynapseT Business Phone System provides simplicity without sacrifice—it's simple to install, manage and use, without sacrificing any of the features you need and expect from a business telephone system.