The Toshiba DDM5060 Digital DSS Module (DDM5060) features: • Provides 60-programmable buttons • Requires either a BDKU, BDKS or BWDKU port • Provides 10-programmable buttons which can be assigned as: — CO line — Directory Number — DSS — One Touch — Speed Dial or any other flexible feature • Works on any of the DP series telephones (except the DP5008) • Up to eight Add-on-Modules can be attached to a telephone • Dual red / green LEDs to indicate call and feature status