Description
Overview
Stay connected wherever your work takes you with the Grandstream DP735 Ruggedized DECT Cordless IP Phone, a durable wireless handset designed for demanding business, warehouse, retail, industrial, and residential environments. Combining HD audio, up to 20 SIP accounts, a 2.4-inch colour display, long battery life, and IP67-rated protection, the DP735 provides reliable cordless VoIP communication while offering the durability required for challenging working conditions.
Designed to work with Grandstream’s DP750, DP752, and DP755 DECT VoIP base stations, the DP735 provides up to 50 metres of indoor range and up to 400 metres outdoors when paired with a compatible DP755 base station. Its rugged construction is water- and dust-resistant, cleaning-chemical resistant, antimicrobial, and drop-safe from up to 2.5 metres.
Quick Specs
- Product Type: Ruggedized DECT Cordless HD IP Handset
- Display: 2.4-inch 240 × 320 colour TFT LCD
- SIP Accounts: Up to 20 per handset when used with DP755
- Lines: Up to 20 lines per handset
- Audio: HD audio on handset and speakerphone
- Conference Calling: 3-way audio conferencing
- Indoor Range: Up to 50 metres
- Outdoor Range: Up to 400 metres with DP755
- Talk Time: Up to 65 hours
- Standby Time: Up to 650 hours
- Protection: IP67 water- and dust-resistant design
- Drop Protection: Drop-safe from up to 2.5 metres
- Push-to-Talk: Dedicated Push-to-Talk button
- Headset: 3.5mm headset jack
- Security: DECT authentication and encryption
- Ideal For: Warehouses, retail, offices, industrial environments, hospitality, and residential VoIP
Why Buy
- Built for demanding environments: IP67-rated protection, antimicrobial construction, chemical resistance, and 2.5-metre drop protection make the DP735 suitable for rugged workplaces.
- Extensive SIP support: Support for up to 20 SIP accounts and 20 lines provides flexibility for users managing multiple extensions or communication services.
- Clear HD conversations: HD audio on both the handset and speakerphone helps deliver clear and natural conversations.
- Excellent cordless mobility: Enjoy up to 50 metres of indoor coverage and up to 400 metres outdoors when paired with a DP755 base station.
- Long battery life: Up to 65 hours of talk time and 650 hours of standby time help reduce charging interruptions.
- Convenient communication: Push-to-Talk, speakerphone, 3-way conferencing, headset connectivity, and multiple telephony functions support everyday business communication.
- Secure DECT communication: DECT authentication and encryption help protect calls and account information.
Insights
The Grandstream DP735 is designed for users who need the freedom of cordless communication without sacrificing durability. Unlike a standard office handset, its ruggedized construction is designed to withstand demanding environments, including exposure to dust, water, cleaning chemicals, and accidental drops.
Its combination of IP67 protection, antimicrobial casing, and 2.5-metre drop resistance makes it particularly practical for warehouses, retail environments, workshops, hospitality locations, and other workplaces where equipment may experience heavier daily use.
The DP735 also delivers business-grade VoIP flexibility. When paired with a compatible DECT base station, a single handset can access up to 20 SIP accounts and 20 lines, while HD audio, speakerphone functionality, and 3-way conferencing help support professional communication.
Key Features
Ruggedized IP67 Protection
The DP735 is built for demanding environments with IP67-rated water- and dust-resistant protection. Its casing is also resistant to cleaning chemicals and incorporates antimicrobial properties, making it well suited to workplaces where durability and hygiene are important.
2.4-Inch Colour Display
A 2.4-inch 240 × 320 colour TFT LCD provides a clear interface for navigating menus, viewing caller information, accessing contacts, and managing phone functions.
Up to 20 SIP Accounts and Lines
The DP735 supports up to 20 SIP accounts and 20 lines per handset when used with the appropriate compatible DECT base station, providing flexibility for multi-extension and multi-service VoIP environments.
HD Audio
HD audio is supported on both the handset and speakerphone. The DP735 supports the G.722 HD voice codec, along with audio processing features including acoustic echo cancellation, automatic gain control, ambient noise reduction, and advanced noise suppression.
Extended Cordless Range
The handset provides up to 50 metres of indoor range. When paired with a DP755 base station, outdoor range can reach up to 400 metres, giving users greater freedom to move around large workplaces and facilities.
Long Battery Life
The built-in rechargeable 2000mAh lithium-ion battery provides up to 65 hours of talk time and 650 hours of standby time under laboratory conditions, helping users stay connected throughout extended shifts.
Push-to-Talk Function
A dedicated Push-to-Talk button provides quick access to communication, making the DP735 particularly useful in workplaces where fast team communication is important.
3-Way Audio Conferencing
The DP735 supports 3-way audio conferencing, allowing users to bring multiple participants into a single conversation without requiring a separate conferencing device.
DECT Security
Built-in DECT authentication and encryption helps protect calls and account information, providing an additional layer of security for wireless VoIP communications.
Headset Connectivity
A built-in 3.5mm headset jack provides an alternative hands-free communication option for users who prefer a wired headset.
Proximity and Accelerometer Sensors
Integrated proximity and accelerometer sensors add additional functionality and support the handset’s rugged workplace design.
Grandstream DECT Base Station Compatibility
The DP735 is supported by Grandstream’s DP750, DP752, and DP755 DECT VoIP base stations. Up to 10 DP735 handsets can be registered to a DP755 base station, while the DP750 and DP752 support up to five DP735 handsets.
Use Cases
- Warehouses: Maintain cordless VoIP communication while moving between storage, loading, and operational areas.
- Retail Stores: Give staff a durable cordless handset for internal communication and customer service coordination.
- Industrial Environments: Rugged construction, IP67 protection, and drop resistance make it suitable for demanding workplaces.
- Hospitality: Provide mobile communication for hotel, facility, maintenance, and service teams.
- Office Environments: Enjoy cordless mobility while retaining professional VoIP calling features.
- Large Facilities: Extended DECT range can help provide communication coverage across larger indoor and outdoor areas when paired with a suitable base station.
- Residential VoIP: Use the DP735 as a durable cordless IP handset for compatible residential VoIP deployments.
Is It Right?
This handset is a great choice if you:
- Need a rugged cordless IP phone for demanding environments.
- Want IP67 water- and dust-resistant protection.
- Need support for multiple SIP accounts and lines.
- Want HD audio for clearer business conversations.
- Need long battery life for extended shifts.
- Require Push-to-Talk and 3-way conferencing functionality.
- Need a handset suitable for warehouses, retail, industrial, hospitality, or similar environments.
- Already use or plan to use a compatible Grandstream DECT base station.
You may want to consider another option if you:
- Need a standalone IP phone that does not require a DECT base station.
- Prefer a traditional wired desktop IP phone.
- Do not require ruggedized or IP67-rated protection.
- Need features designed specifically for high-end call-centre or receptionist environments.
Specifications
| Product Type | Ruggedized DECT Cordless HD IP Handset |
| DECT Standard | DECT |
| Display | 2.4-inch 240 × 320 colour TFT LCD |
| SIP Accounts | Up to 20 per handset with DP755 |
| Multi-Line Access | Up to 20 lines per handset |
| HD Audio | Yes, handset and speakerphone |
| Voice Codec | G.722 HD audio, G.726 narrowband; additional codecs via compatible DECT base station |
| Conference Calling | 3-way audio conferencing |
| Indoor Range | Up to 50 metres |
| Outdoor Range | Up to 400 metres with DP755 |
| Talk Time | Up to 65 hours |
| Standby Time | Up to 650 hours |
| Battery | 2000mAh rechargeable Li-ion |
| Protection Rating | IP67 water- and dust-resistant |
| Drop Protection | Drop-safe from up to 2.5 metres |
| Headset Connection | 3.5mm headset jack |
| Security | DECT authentication and encryption |
| Push-to-Talk | Dedicated Push-to-Talk button |
| Base Station Compatibility | Grandstream DP750, DP752, and DP755 |
| Dimensions | 166 × 57.8 × 26.3 mm |
| Handset Weight | 221.5 g |
| Operating Temperature | -10°C to 45°C |
Compatibility
- Grandstream DP750: Compatible DECT VoIP base station for DP735 deployment.
- Grandstream DP752: Compatible DECT VoIP base station supporting DP735 handsets.
- Grandstream DP755: Recommended for deployments requiring up to 20 SIP accounts and up to 400 metres outdoor range.
- Grandstream UCM Series: Supports Zero Config provisioning when used with compatible Grandstream UCM IP PBX systems.
- Headsets: Compatible with wired headsets using the 3.5mm headset jack.
Setup
- Install a compatible DECT base station such as the Grandstream DP750, DP752, or DP755 and connect it to your VoIP network.
- Power and configure the base station according to the manufacturer’s setup instructions.
- Charge the DP735 handset using the supplied charging cradle and power adapter.
- Register the handset with the compatible DECT base station.
- Configure SIP accounts and required extensions through the base station or compatible Grandstream provisioning system.
- Test calling and audio to confirm that the handset is correctly registered and connected.
- Position the handset within the recommended DECT coverage area for reliable cordless operation.
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