Snom M500 Extender/Dual Pairing

🧭 Step 1 — Prep both bases

On BOTH base stations:

• Plug into network (same LAN or daisy-chain)
• Log into WebUI
• Confirm:
  • Same firmware version ✅
  • Both are factory default (recommended for clean pairing)

⚙️ Step 2 — Configure the PRIMARY base

On the base you want as the main:

1. Go to:
   • System → Multi-Cell (or DECT Settings depending on firmware)
2. Set:
   • Role = Primary
3. Enable:
   • Multi-cell / Dual-cell mode = ON
4. Save / Apply

👉 This base becomes the “controller”

📡 Step 3 — Configure the SECONDARY base

On the second base:

1. Go to:
   • System → Multi-Cell
2. Set:
   • Role = Secondary
3. Enter:
   • Primary Base IP address
4. Save / Apply

🔄 Step 4 — Force sync / reboot

• Reboot BOTH bases (important)
• Give it ~2–3 minutes

👉 During boot:

• Secondary will reach out to Primary
• They will sync configs + DECT network

✅ Step 5 — Verify pairing

On the Primary base WebUI:

• Look for:
  • “Connected base stations”
  • “Multi-cell status”

You should see:

• 2 bases listed
• Status = Connected / Synced

📞 Step 6 — Register handsets (important rule)

• ONLY register handsets to the Primary base
• Do NOT register anything to the secondary

👉 The system handles roaming automatically

🚨 If it doesn’t pair (common fixes)

1. Firmware mismatch

• Must be identical versions
• This is the #1 issue

2. Wrong network / VLAN

• Both bases must:
  • See each other (ping test)
  • Be on same subnet (ideally)

3. Multicast blocked

• Some networks block DECT sync traffic
• Test on a simple switch if unsure

4. Didn’t reboot after config

• Reboot both — seriously, it matters here

5. Wrong IP entered

• Double check Primary IP on secondary