The DSS32 Expansion stations greatly enhance the functionality and expandability of the ST series IP Phone. Each Expansion Station has 32 programmable keys (bi-color LEDs) and connects to lP Phones that support Expansion Stations via an Type-C straight-through cable. The phone supports up to six expansion stations and provides192 programmable keys. In conjunction with IP PBX, each programmable key can be used for speed dialing, BLF, and call answering in collaboration with the server.

The Extension Desk is suitable for front desk switchboards, administrative assistants, call center agents, and users who need to monitor or manage a large number of calls.