Yealink SIP-T33G – Classic Business IP Phone

Display:

• Type: 3.7-inch color LCD display
• Resolution: 360 x 160 pixels
• Backlit: Yes, with 5-level contrast adjustment
• Display Lines: 2 lines for displaying call information

Audio:

• HD Voice: Yes, supports wideband audio for high-definition sound quality
• Codec Support:
  • Audio Codecs: G.722, G.711 (u/a), G.729, G.723.1, iLBC, G.726, Opus
  • Audio Quality Features: Supports Yealink’s Acoustic Shield technology for improved sound clarity, echo cancellation, and noise suppression
• Hands-Free Operation:
  • Speakerphone: Full-duplex speakerphone for hands-free communication with advanced noise filtering
  • Headset Support: Yes, supports both wired (via 3.5mm jack) and wireless headsets (via USB dongle)

Connectivity:

• Ethernet Ports:
  • 2 x 10/100/1000 Gigabit Ethernet ports (LAN and PC ports)
• Power over Ethernet (PoE):
  • PoE Standard: IEEE 802.3af (supports power via Ethernet cable)
• USB Port:
  • 1 x USB 2.0 port for USB headsets or other accessories
• Bluetooth: Optional, can be added via a USB Bluetooth dongle for wireless headset support

Line Support and Key Features:

• SIP Accounts: Supports up to 2 SIP accounts
• Programmable Keys:
  • 6 programmable keys with self-labeling for customizing features (e.g., speed dial, BLF, call forwarding)
• Call Features:
  • Call hold, transfer, forward, conference, and park
  • Redial, do-not-disturb (DND), call return, call history (missed, received, dialed)
• Video Calls: Basic video support with the 3.7-inch display (limited support depending on model)

Power:

• Power Supply:
  • 5V/1A power adapter (included)
  • Alternatively, the device can be powered via PoE (Power over Ethernet)
• Energy Efficiency: Energy-efficient design, with support for low-power operation when not in use

Security:

• Encryption and Security Protocols:
  • TLS (Transport Layer Security) for encrypted signaling
  • SRTP (Secure Real-Time Transport Protocol) for encrypted audio
  • HTTPS for secure web interface access
  • VPN and VLAN support for network security and isolation

Network:

• Network Protocols:
  • SIP (Session Initiation Protocol) v2
  • QoS (Quality of Service) for optimal call quality
  • SNMP for network management and monitoring
• VLAN Support: Yes, supports both IEEE 802.1Q and 802.1P for VLAN tagging and prioritization

Management:

• Provisioning and Configuration:
  • Supports automatic provisioning via Yealink Redirection Server
  • Remote firmware upgrades via TFTP, FTP, HTTP, and HTTPS
  • Web-based interface for easy configuration and management
• Compatibility: Compatible with most SIP-based VoIP systems and services
• Reset and Recovery: Factory reset feature via the web interface or phone settings

Physical:

• Dimensions (L x W x H):
  • 192mm x 180mm x 140mm (7.56” x 7.09” x 5.51”)
• Weight: 1.2 kg (2.65 lbs) including stand
• Stand: Adjustable stand with multiple angles for comfortable viewing
• Wall Mountable: Yes, can be mounted on the wall

Other Features:

• Call Center Integration: Supports call center features like call queue and automatic call distribution (ACD) in supported environments
• Call Logs: Stores call history, including missed, dialed, and received calls
• Language Support: Multi-language support (over 20 languages)

Environmental:

• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Operating Humidity: 10% to 90% RH, non-condensing
• Storage Temperature: -10°C to 50°C (14°F to 122°F)

Compliance:

• Certifications:
  • CE, FCC, RoHS, and UL certified

Ideal Use Cases:

The Yealink SIP-T33G is designed for business environments that require reliable, high-quality communication, including small to medium-sized offices, retail, and call centers. Its cost-effective design, combined with features such as HD voice, security, and easy provisioning, makes it an excellent choice for organizations that need a dependable and easy-to-manage IP phone.