Installation Guide
Tools Needed:
- Ethernet cable (CAT5e or higher)
- Power adapter (if not using PoE)
- Screwdriver (for wall mount)
- Network switch with PoE support
- VoIP service credentials
Step-by-Step Installation
- Unpack and Inspect: Remove all packaging materials and verify all components are present (phone, handset, cables, documentation).
- Connect to Network: Connect the Ethernet cable from your network switch/router to the LAN port on the VoIP phone.
- Power Connection: Connect the power adapter or ensure PoE is enabled on your network switch for power over Ethernet.
- Handset Connection: Connect the telephone handset to the designated port on the phone.
- Optional Accessories: Connect headset to the headset port and additional line if supported.
- Power On: Connect power source and wait for the phone to boot up (approximately 1-2 minutes).
- Configuration: Access the web interface or use the phone's menu to configure VoIP service settings.
Specifications
| Model Series | DPH-XX Series |
| Type | Business VoIP Phone |
| Color | Black / Charcoal |
| Display | 2.4" Color LCD with Backlight |
| Network Interface | Dual 10/100/1000 Mbps Ethernet Ports |
| Power Options | PoE (802.3af) or DC 5V/2A Adapter |
| Supported Protocols | SIP 2.0 (RFC3261), TCP/IP, UDP, RTP, RTCP |
| Audio Codecs | G.711, G.722, G.726, G.729A/B |
| Power Requirements | 100-240V AC, 50/60Hz |
| Dimensions (HxWxD) | 22 x 20 x 8 cm |
| Weight | 0.8 kg |
| Operating Temperature | 0°C to 40°C |
Warranty Information
- Full Warranty: 1 year parts and labor
- Extended Support: Optional 3-year extended warranty available
- Technical Support: 24/7 online support available
For warranty service, contact D-Link Customer Service at 1-800-326-1688 or visit D-Link.com/support
Key Features
HD Voice Quality
Wideband audio support with advanced noise cancellation technology provides crystal clear voice quality for professional business communications.
Power over Ethernet
Supports IEEE 802.3af PoE standard, eliminating the need for separate power cables and simplifying installation in office environments.
Dual Ethernet Ports
Built-in network switch allows connection to your computer through the phone, reducing cable clutter and saving switch ports.
SIP Protocol Support
Full SIP 2.0 compliance ensures compatibility with most VoIP service providers and PBX systems for flexible deployment options.
Multi-line Support
Supports up to 4 SIP accounts/lines with individual configuration, allowing multiple service providers or extensions on a single device.
Advanced Call Features
Includes call waiting, call forwarding, three-way conferencing, call transfer, and DND (Do Not Disturb) for comprehensive business functionality.
Call Management Features
Call Transfer
Blind and attended call transfer capabilities for efficient call routing
Conference Calling
Three-way conference calls with individual participant control
Call Forwarding
Multiple forwarding options based on time, availability, or number
Speed Dial
Programmable speed dial buttons for quick access to frequent contacts
Call History
Detailed call logs with timestamps and duration for missed, received, and dialed calls
Auto Attendant
Built-in auto attendant for basic call routing without PBX system
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone won't power on | Power adapter issue, PoE not enabled, faulty cable | Check power source, verify PoE switch settings, try different Ethernet cable |
| No dial tone | Network connectivity, SIP configuration, service provider issue | Check network connection, verify SIP settings, contact service provider |
| Poor call quality | Network congestion, QoS settings, codec mismatch | Check network bandwidth, enable QoS, verify codec configuration |
| Can't make/receive calls | Firewall blocking, NAT issues, registration failure | Check firewall settings, configure STUN if behind NAT, verify registration |
| Display not working | Power issue, loose connection, defective display | Check power supply, reseat connections, factory reset |
| One-way audio | NAT traversal issues, firewall configuration | Enable STUN, check router settings, configure proper RTP ports |
Status Indicators & Error Codes
- Solid Green: Registered and ready
- Flashing Green: Incoming call or call in progress Flashing Red: Registration failed - Check network and SIP settings
- No Light: No power or network connection
- Error 408: Request timeout - Check network connectivity
- Error 486: Busy here - Destination busy or unavailable
- Error 503: Service unavailable - Server issues
Manual Downloads
Current Model Manuals
DPH-150S
Basic Business VoIP Phone
DPH-300
Advanced VoIP Phone with Display
DPH-450
Executive VoIP Phone with Color Display
DPH-700
Premium VoIP Phone with Touch Screen
Popular Previous Models
DPH-140S
Entry Level VoIP Phone
DPH-250
Mid-range Business Phone
DPH-400
Feature-rich VoIP Phone
DPH-600
Advanced Conference Phone