The Grandstream DP735 is a ruggedized DECT cordless IP phone designed to deliver mobility, durability, and advanced telephony features for demanding environments such as warehouses, construction sites, retail stores, and industrial facilities. It pairs seamlessly with Grandstream’s DECT base stations (DP750, DP752, and DP755) to provide a comprehensive cordless VoIP solution.
🔧 Key Specifications
📞 Telephony & SIP Support
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SIP Accounts: Supports up to 20 SIP accounts and 20 lines per handset (when used with DP755 base station).
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Concurrent Calls: Handles up to 2 simultaneous calls per handset.
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3-Way Conferencing: Enables 3-way voice conferencing.
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Push-to-Talk: Dedicated button for instant communication.
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Advanced Features: Includes call transfer, call forward, call waiting, do not disturb, message waiting indication, multi-language prompts, and flexible dial plans.
🔊 Audio & Display
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HD Audio: Full HD audio on handset and speakerphone.
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Speakerphone: Full-duplex for clear communication.
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Display: 2.4-inch (240×320) color TFT LCD with 3 programmable soft keys.
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Headset Jack: 3.5mm for wired headsets.
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Voice Codecs: Supports G.722 for HD audio and G.726 for narrowband audio. Additional codecs like G.711μ/a-law, G.723.1, G.729A/B, iLBC, and OPUS are supported via the companion DECT base station.
🔋 Battery & Power
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Battery: 2000 mAh Li-ion rechargeable battery.
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Talk Time: Up to 65 hours.
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Standby Time: Up to 650 hours.
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Charging: Via included charging cradle or micro-USB port for alternative charging and non-battery operation.
📶 Range & Connectivity
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Indoor Range: Up to 50 meters.
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Outdoor Range:
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Up to 400 meters with DP752 or DP755 base stations.
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Up to 300 meters with DP750 base station.
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Base Station Compatibility: Pairs with DP750, DP752, or DP755 DECT VoIP base stations.
🔐 Security & Provisioning
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Encryption: DECT authentication and encryption to protect calls and accounts.
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Provisioning: Supports automated provisioning via TR-069 and XML configuration files.
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Integration: Zero Config provisioning when used with Grandstream’s UCM series of IP PBXs.
🛡️ Rugged Design
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Durability Rating: IP67-rated for water and dust resistance.
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Drop Protection: Drop-safe from up to 2.5 meters.
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Casing: Antimicrobial and resistant to cleaning chemicals.
📦 Physical Features
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Keys: 27 keys including 3 soft keys, 5 navigation/menu keys, 4 dedicated function keys (SPEAKERPHONE, MUTE, SEND, POWER/END), and 3 side keys (2 volume keys and 1 Push-to-Talk key).
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LED Indicators: 3-color Message Waiting Indicator (MWI) LED.
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Sensors: Built-in proximity and accelerometer sensors for gesture control and alert notification.
