- Compatible with C66 and C62
- 30 DSS buttons with dual color (LED-Green and Red) for line status information
- Up to 29 programmable functions
- Daisy-chain 5 modules for 150 programmable keys
- Supports Busy Lamp Field (BLF), Presence
- Programmable for speed dialing, call pickup, Intercom, hold, transfer, voicemail etc.
- Expansion module is powered by the host phone