Guangdong, China
Business Type:
Year of Establishment:
Plant Area:
2600.0 square meters
Management System Certification:
Terms of Payment:
LC, T/T, PayPal, Western Union
OEM/ODM Service
Sample Available
MEI Awards
Spanish Speaker

VoIP Door Phone, Outdoor Telephone, Indoor Telephone manufacturer / supplier in China, offering VoIP Door Phone Knzd-51 Access Control System Smart Phone, Wireless IP Door Phone Knzd-42IP Video Phone Intercom, Vandal Resistant Public Jail Inmate Prison Phone with Competitive Price and so on.

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VoIP Door Phone Knzd-51 Access Control System Smart Phone

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Purchase Qty. / Reference FOB Price
1-99 Pieces US $260
100-999 Pieces US $250
1,000+ Pieces US $240
Port: Shenzhen, China
Production Capacity: 1000PCS Per Week
Payment Terms: L/C, T/T, Paypal
Color: Black
Material: SUS304
Weatherproof Degree: IP65
Ambient Temperature: -30ºC~75ºC
Relative Humidity: 10%~95%
Keypad: No

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Basic Info

Model NO.
Analogue, VoIP
Vandal Resistant
Transport Package
Pearl Cotton, Carton
Shenzhen, China
HS Code
VoIP door phone KNZD-51 access control system smart phone
KNZD-51 IP voice access telephone using advanced technology and the security and stability of Broadcom master chip, greatly improve the system's stability and durability while SIP2.0 standards-based protocol that can be perfectly compatible with all current mainstream SIP-based IP PBX / softswitch, IMS platforms such as Asterisk, Broadsoft, 3CX, Elastix, etc. for users to quickly deploy equipment more convenient.
KNZD-51 pan with a high-strength cold-rolled steel, with high-quality aluminum shell, impact resistant up to IK10 standard. Its product features and production process materials are inherited KOONTECH special industrial telephones high quality, high demand and so on. Product modeling beautiful, stylish, elegant, functional and practical, reliable, easy installation, comfortable buttons and low power consumption. Popular with customers welcome, is widely used in apartments, hospitals, schools, subways and other places.
VoIP Door Phone Knzd-51 Access Control System Smart Phone

1.Built-in dynamic noise reduction, to achieve high-quality voice communications
2.With light on Metal Keyboard
3. Support two SIP account
4. High-strength cold-rolled steel housing and high-quality aluminum shell, impact resistant up to IK10 standard
5. Support RFID, remote and password door open
6. Access control, intercom and IP broadcast triple feature integration
7. Support SIP2.0, support SIP2.0(RFC3261) and related RFC protocol
8. Using Web online configuration, easy to manage
9. Support safe mode, and can be upgrade the software.

Button: 12 full keypad with light and one handset free button or speed dial button
RJ45 network port x2: network x1 (Support 802.3af Class 1 POE)
PoE: 802.3af (Class 0 - 12.95W) 48V/380mA(Not a standard design)
Master chip: Broadcom
Audio Amplifiers: 2.5W
Powered: 12V+-15%/1A DC or POE
Material: Aluminium alloy&Aluminum Extrusion
Weatherproof degree: IP55
Humidity: 10%-95%
Temperature: -40~70ºC
Product Size: 230*126*76.5 mm
N. W: 2.0kg
VoIP Door Phone Knzd-51 Access Control System Smart Phone


VoIP Door Phone Knzd-51 Access Control System Smart Phone

Our company's products are performance in below listed project:
Project nameCountry
HongKong High-speed railwayHongKong
Highway ProjectsAustria
Haramain High Speed RailwaySaudi Arabia
Lusail Transit System ProjectDubai
Northern Link NL 66 ProjectUK
Tunis RFR ProjectTunis
Bangalore MetroIndia
Delhi International AirportIndia
Railway tunnelMalaysia
Apion Kleus(highway and tunnel)Greece
New motor way E65 and E65Greece
New highway ProjectGreece
Metro tunnel projectDubai
West Island LineChina(HK)
Railway TunnelMalaysia
Tel Aviv Red Line LRTIsrael
Egnatia Highway TunnelsGreece
Turkey railway projectTurkey
VoIP Door Phone Knzd-51 Access Control System Smart Phone

The Most Professional Emergency Telephone Supplier In Asia

HONGKONG KOON TECHNOLOGY LTD is a leader in the research and development, manufacture and sales of Industrial  Emergency telephone products.   Occupied 90% of SUBWAY market in China includes Shenzhen, Guangzhou, Tianjin, Dalian, Shanghai and Chongqing. We are the important supplier of China Army. We keep friendly Co-operation with SIMENS, ALCATEL, Thales,TTIC, Schlumberger, Tadiran, Network rail UK, Italian railway, etc. for over 8~10 years and other renowned companies are part of the leading consumer. Currently, there are over 80 models CE/FCC and IP67 certified available either for OEM or our brand  KOON . KOON has a network of over 100 distributors in China and exports to over 100 countries in Asia, North American, Europe and Middle East.
   KOON has its own developing center and production base. The factory covers an area of 8000 square meters with workshop of 6000 square meters which have got ISO9001 and strictly controlling according to ISO.
        Company principle: for first quality and best service.
        Our team: with the camel's spirits of targeted, disciplined, perseverance, endurance.
        Our staff: of honesty, sincerity, carefulness, meticulosity and toughness.
        Our vision: with aim of creating world famous brand and building a century-old company.

Q: What version of the VoIP door phone KNZD-51 access control system smart phone do you have? 
A: All of our models are support five versions: analogue(PSTN), VoIP, GSM, PAGA, Wifi. Can be powered by AC110-240V, DC12V / DC5V, telephones line powered, solar, POE, battery or UPS. 

Q: What's the advantages of your Sounder and Light Telephone compared with others?
A: a. Most of our products have got the International Standard certification. Such as IECEx, IP65, IP66, FC, CCC, ISO9000, EMC, ROHS, SGS, ...etc.
b. We have enough stocks support flexible and fast lead time within 3-7 days.
c. We support the best price lower than others with good quality and 24X7 hours online service. If you could share the project name and the photos of after-installation, we will offer 5-10% discount to support you.

Q: How long is the warranty period?
A:Normally the warranty period is 18 months after items received. If there any issues on the phones, we can send parts for your replacement.

Q: Will you offer any spare parts in free?
A: Yes, we can offer 2% spare parts(not included the phone housing).

Q: Can you provide a neutral version?
A: Yes. we can support neutral version. Normally, the default is our standard Kntech brand and the price is favorable than the neutral version. 

Q: If some parts of the phones occur issue need to be changed, can we find the parts in our local store?
A: Yes, if out of the warranty period, please let us know the issue and we will offer the technical data of the parts and reference price. 

Q: Can I purchase the accessories separately like PCB board, handset, buttons, speaker, keypad, ...etc?
A: Yes, we support MOQ 1pcs. 

Q: Can I do customized of the Sounder and Light Telephone? 
A: Yes, we support OEM \ ODM order. We have our own R&D Department with high technology support. Please provide your detailed requirements.

Q: Can I choose other colors of the Sounder and Light Telephone? 
A: Yes, normally the default color is yellow. Some model like KNZD-04, KNZD-11, KNZD-13, KNZD-14... support red, blue or white. It is base on our stock. If the quantity over 100pcs, we can support other colors. 

Q: What's the MTBF of the your VoIP door phone KNZD-51 access control system smart phone
A: The MTBF is 50,000-70,000 hours. And the average failure rate is very low at 0.3%. 

Ms. Sunny Wu
M: +86 137 2786 5475

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