Price includes power supply
Add up to 64 additional lines to your Cisco Small Business Pro IP Telephone with the Cisco SPA500S 32-Button attendant console module. Each Cisco SPA500S supports 32 lines and you can daisy-chain up to (2) SPA500S to any of the Cisco Small Business Pro line IP Phones.
The Cisco SPA500S is a great choice for users who require additional line support, such as receptionists. The Cisco SPA500S easily attaches to the following models of Cisco phones: SPA501G, SPA502G, SPA504G, SPA508G, SPA509G or SPA525G IP phones via the onboard AUX port. You can connect up to (2) Cisco SPA500S modules, adding an additional 64 lines.