°‹ MPD Hybrid IC can be installed on the system base board and NX-4TRK option card(maximum of four per card) for detecting metering pulses.Optionally, MPD Hybrid ICs for 50Hz, 12kHz or 16kHz can be provided.°‹ MDF Samsung Electronics Co. can provide several types if user order.NX-828 has room enough to accommodate MDF's in the cabinet if userinstall the MDF's provided by Samsung Electronics Co.3.3 Station Equipments°‹ Keyset with 24 buttons (NX-24E, NX-24B)- Built-in speakerphone- 24 programmable soft keys (12 with tri-colored LEDs) and 10 fixed function keys- UP/DOWN buttons for digital control of speaker, handset and ringer volumes.- Four selective ring tones per keyset- Desk-mounted or wall-mounted- Can be connected to the SKP-308H/816H system- NX-24E keyset has a 1-line 16-character display.°‹ Basic keyset with 6 buttons (NX-6B)- 6 programmable soft keys and 10 fixed function keys- UP/DOWN buttons for digital control of speaker, handset and ringer volumes.- Four selective ring tones per keyset- Desk-mounted or wall-mounted- can be connected to SKP-308H systemKeysets come in one colour: Dark Grey.°‹ Add-On Module (NX-AOM)- 24 programmable soft keys°‹ Door phone set (DPH)- Can be connected to NX-DPH/PAGING card and uses a one (1) pair modular cable.1 - 4NX-828 HYBRID KEY SYSTEM GENERAL DESCRIPTION