1. Introduction
Welcome to the user manual for the Snom SNO-720 4-Line Gigabit Phone. This document provides essential information for the proper setup, operation, and maintenance of your device. The Snom SNO-720 is a professional VoIP phone designed for business communication, offering advanced features and high-quality audio.

Figure 1: Front view of the Snom SNO-720 4-Line Gigabit Phone. The phone features a display, multiple programmable keys, a numeric keypad, and a handset.
2. Package Contents
Before proceeding with the setup, please ensure all components are present in your package:
- Snom SNO-720 IP Phone unit
- Handset
- Handset cord
- Ethernet cable
- Power adapter (if not using Power over Ethernet - PoE)
- Quick Installation Guide (this document serves as the full manual)
3. Setup
3.1 Physical Setup
- Connect the Handset: Plug one end of the coiled handset cord into the handset and the other end into the handset port on the phone base unit.
- Connect to Network: Connect one end of the Ethernet cable to the LAN port on the phone and the other end to your network switch or router. If your network supports Power over Ethernet (PoE), the phone will power on automatically.
- Connect Power (if no PoE): If PoE is not available, connect the power adapter to the power port on the phone and then plug it into a power outlet.
3.2 Initial Configuration
Upon first boot, the phone will attempt to obtain an IP address via DHCP. If your network requires static IP configuration or specific VoIP server settings, you may need to access the phone's web interface or local menu.
- Accessing Web Interface: Once the phone has an IP address (displayed on the screen), enter this IP address into a web browser on a computer connected to the same network.
- Account Registration: Follow the instructions provided by your VoIP service provider or system administrator to register your phone with the SIP server. This typically involves entering SIP account details (username, password, server address).
4. Operating the Phone
4.1 Basic Call Functions
- Making a Call: Pick up the handset or press the Speaker button. Dial the desired number and press the Dial/Send button or wait for automatic dialing.
- Receiving a Call: When the phone rings, pick up the handset or press the Speaker button or the flashing line key.
- Ending a Call: Hang up the handset or press the End Call button.
- Hold: During an active call, press the Hold button. Press it again to resume the call.
- Transfer: During an active call, press the Transfer button, dial the new number, and then press Transfer again (for blind transfer) or wait for the party to answer and then press Transfer (for attended transfer).
- Conference: During an active call, press the Conference button, dial the number of the third party, and once they answer, press Conference again to join all parties.
4.2 Using Line Keys
The SNO-720 features multiple programmable line keys. These keys can be configured for various functions such as additional lines, speed dials, busy lamp fields (BLF), or other features as set by your system administrator.
4.3 Voicemail Access
To access your voicemail, press the Voicemail button (often indicated by an envelope icon) and follow the voice prompts. You may need to enter a PIN.
4.4 Directory and Contacts
The phone supports a local directory and may integrate with network directories. Use the navigation keys to access the directory and search for contacts.
5. Maintenance
5.1 Cleaning
To clean the phone, use a soft, dry, or slightly damp cloth. Avoid using abrasive cleaners, solvents, or strong chemicals, as these can damage the phone's surface and components. Ensure the phone is unplugged before cleaning.
5.2 Firmware Updates
Firmware updates are typically managed by your system administrator to ensure optimal performance, security, and access to new features. Do not attempt to update firmware without proper guidance.
6. Troubleshooting
This section addresses common issues you might encounter with your Snom SNO-720 phone.
| Problem | Possible Cause | Solution |
|---|---|---|
| No dial tone | Phone not powered on; Network cable loose; SIP registration failed. | Check power connection/PoE; Ensure Ethernet cable is securely connected; Verify SIP account settings with administrator. |
| Cannot make/receive calls | SIP account not registered; Network connectivity issues; Incorrect dialing plan. | Check phone's registration status on display; Verify network connection; Consult administrator for dialing rules. |
| Display is blank | No power; Phone in sleep mode. | Check power connection; Press any key to wake up the phone. |
| Poor audio quality | Network congestion; Faulty handset/headset; Incorrect audio settings. | Check network bandwidth; Test with another handset/headset; Consult administrator for QoS settings. |
7. Specifications
Key technical specifications for the Snom SNO-720 4-Line Gigabit Phone:
| Feature | Detail |
|---|---|
| Model Number | SNO-720-cr |
| Product Dimensions | 13 x 4 x 10 inches; 3.13 Pounds |
| Manufacturer | Snom |
| Telephone Type | Corded |
| Power Source | Corded Electric |
| Answering System Type | Digital |
| Recording Capacity | 22 minutes |
| Multiline Operation | Multi-Line Operation |
| UPC | 603784287690 |
8. Warranty Information
The Snom SNO-720 4-Line Gigabit Phone typically comes with a 1-Year Warranty from the date of purchase. Please refer to your purchase documentation or contact your vendor for specific warranty terms and conditions, as these may vary based on the seller and region.
9. Support
If you encounter issues not covered in this manual or require further assistance, please contact your IT department, VoIP service provider, or the vendor from whom you purchased the Snom SNO-720 phone. They can provide specialized support and troubleshooting for your specific setup.







