D-Link DPH-400SE Broadband Internet IP Phone

The D-Link DPH-400SE Broadband IP Phone is a feature-rich and professional-grade VoIP phone tailored for modern businesses and remote offices. Designed to leverage broadband connectivity, this IP phone delivers high-quality voice communication over the Internet while maintaining the familiar layout of a traditional desktop phone. With support for multiple SIP accounts, HD voice quality, advanced call management features, and dual Ethernet ports, the DPH-400SE offers outstanding performance in VoIP environments without compromising on ease of use.

The phone is equipped with comprehensive call control functions, a user-friendly interface, and secure network features like VLAN tagging and VPN support, ensuring reliable operation and data protection in both enterprise and SOHO setups.

Product Features

High-Definition Voice Quality
The DPH-400SE utilizes advanced voice codecs including G.722 and G.729A/B, along with Acoustic Echo Cancellation, Silence Suppression, Voice Activity Detection, and Comfort Noise Generation for crystal-clear communication.

Dual Ethernet Ports for Simultaneous Voice and Data
With two RJ-45 ports, the phone allows you to connect to a DSL/cable modem or router, while offering an additional port to link your PC. This enables users to browse the internet or handle other network tasks while on a call.

Advanced Telephony Functions
Supports call hold, call transfer (blind, attended, early attended), call forwarding (busy, no answer, unconditional), 3-way conferencing, redial, mute, DND, intercom, hotline, and more — designed for busy office environments.

Multi-Account and Contact Management
Supports up to 5 SIP accounts and stores up to 500 contacts in the built-in phonebook. Also logs 100 missed, 100 received, and 100 dialed calls with caller ID support.

User-Friendly Interface and Controls
Features an LCD screen, soft keys, 4-way navigation buttons, volume controls, speed dial, and keypad lock. The intuitive menu is available in English and other languages via the keypad or web UI.

Robust Security and QoS
Supports VLAN (802.1Q), Class of Service tagging, LLDP, and both L2TP/OpenVPN protocols. Ensures priority and security for voice traffic even in shared network environments.

Flexible Provisioning and Updates
Allows remote firmware upgrades via FTP, TFTP, or HTTP. Supports auto-provisioning (APS) for easy deployment and management.

Expansion-Ready and Accessory-Friendly
Includes support for external expansion modules, built-in headset jack, and speakerphone functionality for hands-free operation.

Product Specifications

• Model: D-Link DPH-400SE
• Display: LCD screen with multilingual UI
• Network Ports:
  • 2 × RJ-45 10/100 Mbps Ethernet (1 WAN, 1 LAN)
  • Supports PoE (via compatible switch)
• Power Supply:
  • Input: 100–240V AC
  • Output: 5V / 1A DC
  • Power Consumption: 1.5W (Standby), 1.8W (Talking)

Voice Codecs Supported:

• G.711 a/u-law
• G.729A/B
• G.723.1 (high/low)
• G.726-32
• G.722 (HD Voice)

Advanced Voice Features:

• Silence Suppression
• Acoustic Echo Cancellation (G.168) – hands-free up to 96ms
• Voice Activity Detection (VAD)
• Comfort Noise Generation
• Jitter Buffer
• Packet Loss Concealment (PLC)
• DTMF via SIP Info, Transparent, RFC 2833

Call Management Functions:

• Call hold/resume
• Blind/attended/early transfer
• Call waiting and indication
• Call forwarding (busy, no answer, unconditional)
• Anonymous call/rejection
• Auto-answer
• Blacklist/Limit list
• Call pickup/Intercom
• 3-way conferencing
• Hotline/Ban outgoing
• Do Not Disturb
• Emergency calls
• BLF/Presence

User Features:

• 4 Soft keys
• 4 Navigation keys
• Speaker, Mute, Redial, Volume control
• Memo, SMS, Memo, Keypad lock
• 12 Ringtones (9 tones + 3 melodies)
• 9 Speed dial numbers
• Day/Time display
• 500-contact phonebook
• Connects to expansion module

Provisioning and Management:

• Web UI and Keypad-based setup
• Auto-provisioning via FTP, TFTP, HTTP
• Firmware upgrade support
• Supports STUN, SNTP, NAT traversal
• Supports static IP, DHCP, PPPoE

Security & QoS:

• VLAN (Voice/Data), 802.1Q/802.1p
• LLDP, DSCP/ToS
• L2TP VPN / OpenVPN support