Make sure this fits by entering your model number. Model replaces Sangoma s5004 SIP AccountsFull duplex speaker phone 3.5 inch full color display28 programmable soft keys- 4x SIP Accounts- 3.5 Inch Full Color Display- PhoneApps Support- 35 Programmable Soft Keys- 5-way Conferencing- Full Duplex Speaker Phone- Headset & Expansion Module Compatible- Dual Gigabit Ethernet Ports- Optional 3-year Advanced- Hardware Replacement Plan