Answer
Sep 18, 2026 - 10:08 AM
The number of line keys determines how many simultaneous calls, contacts, or features you can manage directly from your phone, making it a key factor for both small offices and busy environments. The "best" number depends on your specific needs: more line keys are great for receptionists or power users, while fewer line keys suit basic users. E Series phones offer a variety, from 4-line keys (supporting up to 16 lines) on the Poly Edge E220, to 8-line keys (up to 32 lines) on the Poly Edge E320, and up to 12-line keys (48 lines) on the Poly Edge E550. This variety allows you to choose the right balance of functionality and simplicity for your workflow.
