What is the Grandstream GBX20

The Grandstream GBX20 is an IP phone extension module designed to expand contact management and call control capabilities for compatible Grandstream IP phones.

How many contacts can one GBX20 support

One GBX20 supports up to 40 contacts or extensions through two pages with 20 programmable keys per page.

How many GBX20 modules can be connected together

Up to four GBX20 modules can be daisy chained to support up to 160 contacts or extensions.

Which Grandstream phones are compatible with GBX20

The GBX20 is compatible with GRP2615 GRP2624 GRP2650 GRP2670 GXV3350 and GXV3450 IP phones according to current Grandstream product information.

Does GBX20 support BLF

Yes. The GBX20 supports busy lamp field functions for monitoring extension and call status.

Can GBX20 support call transfer and call pickup

Yes. The GBX20 supports call transfer and call park pickup functions for efficient business call handling.

Is GBX20 suitable for receptionists

Yes. The GBX20 is designed for users who manage high volumes of incoming calls and need efficient contact monitoring and call dispatching.

What are the main applications of GBX20

Typical applications include reception desks executive offices call centers corporate offices and other business environments requiring expanded extension monitoring and call management.

Secured Trading Service

What is STS?

STS is an escrow service that protects both buyers and suppliers. Funds are held securely by Made-in-China.com until order terms (e.g., delivery, quality) are fulfilled

Key Advantages

Payment Protection:: Your payment is only released to the supplier after you confirm satisfactory delivery.Suppliers receive payment only upon your approval.
Dispute Resolution:: If issues arise (e.g., quality discrepancies, shipping delays), our team mediates and facilitates resolutions based on evidence.
Flexible Payment Options:: Supports credit cards (Visa/MasterCard), PayPal, Apple Pay, Google Pay, many local payment methods and T/T (bank transfer).

Grandstream GBX20 Extension Module for Business IP Phone Call Management

Shenzhen Yibote Information Technology Co.,Ltd

7 yrs

5.0 (1 Review)

Send Inquiry

Chat Now

Product Highlights

High Capacity Contact Support: Supports up to 160 contacts by daisy-chaining 4 modules, each handling 40 contacts.
Advanced Call Features: Includes BLF, call park/pick-up, speed-dial, presence, intercom, and voice conferencing.
Large Color LCD Display: Features a 4.3-inch (272x480) TFT color LCD with backlight for clear visibility.
Flexible Module Configuration: Each module contains 20 keys per page with 2 pages, allowing 40 lines per unit.
Compatible with Grandstream Phones: Designed to work seamlessly with GXV3350, GRP2615, and GRP2624 IP phones.
Customization Options: Offers full customization, minor customization, and flexible customization from designs.
Efficient Call Management: Ideal for high call volumes, ensuring maximum productivity for receptionists.
Dual-Color Extension Keys: Equipped with 20 dual-colored extension keys for intuitive visual identification.
Supports FCC IC CE and RCM compliance standards for international deployment.

Product Attributes

Customization: Available
Type: IP Phone Extension Module
Function: IP Phone Extension Module
Model NO.: GBX20
Display: With Display
Touch Screen: Without Touch Screen
Dial: No
Voice Mail: No
Cordless Telephone Frequency: No
Answering Machine Record Audio Format: No
Accessories: No
Customized: Non-Customized
Display Resolution: 272 x 480
Programmable Keys: 20 Dual Color Keys
Compatible IP Phones: GRP2615 GRP2624 GRP2650 GRP2670
Compatible IP Video Phones: GXV3350 GXV3450
Power Supply: 12V DC 1A
Compliance: FCC IC CE RCM
Transport Package: Original Package
Specification: 210 x 124 x 33.5 mm
Trademark: Grandstream
Origin: China
Production Capacity: 300
Package Size: 21.00cm * 12.40cm * 3.35cm
Package Gross Weight: 0.360kg

Shipping

Shipping Cost:: Contact the supplier about freight and estimated delivery time.

Online Trading Protection

Payment Guarantee: Platform-protected payments with refund support for eligible order issues.
Platform Logistics: Clearer shipment tracking with platform-supported logistics.
Inspection Service: Optional pre-shipment inspection for quality and quantity checks.
After-Sales & Dispute Handling: Platform-assisted dispute resolution, including refunds or returns when applicable.

Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.

Grandstream GBX20 Extension Module for Business IP Phone Call Management

Grandstream GBX20 Extension Module for Business IP Phone Call Management pictures & photos — Grandstream GBX20 Extension Module for Business IP Phone Call Management

Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management

Add Inquiry Basket to Compare

Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management
Grandstream GBX20 Extension Module for Business IP Phone Call Management

1/7

Find Similar Products

Product Description

Grandstream GBX20 Extension Module for Business IP Phone Call Management

The Grandstream GBX20 is a professional IP phone extension module designed to expand call control and contact management capabilities for compatible Grandstream business communication systems. It features a 4.3 inch TFT color LCD with 272 by 480 resolution and provides 20 programmable extension keys per page. With two pages available on each module the GBX20 supports up to 40 contacts or extensions.

Up to four GBX20 modules can be daisy chained to provide access to as many as 160 contacts or extensions. The module supports useful business communication functions including busy lamp field call park pickup speed dial presence intercom and call transfer. These features make the GBX20 suitable for receptionists executives call attendants offices and other users who manage high volumes of incoming calls.

The GBX20 is compatible with Grandstream GRP2615 GRP2624 GRP2650 GRP2670 GXV3350 and GXV3450 IP phones. Its compact design and clear color display provide an efficient solution for expanding business phone functionality. The product supports FCC IC CE and RCM compliance standards.

Grandstream GBX20 Extension Module for Business IP Phone Call Management

Item	Specification
Product Model	GBX20
Product Type	IP Phone Extension Module
Brand	Grandstream
Display	4.3 inch TFT Color LCD
Display Resolution	272 x 480
Programmable Keys	20 Dual Color Keys
Contact Capacity	Up to 40 Contacts per Module
Maximum Expansion	Up to 160 Contacts with 4 Modules
Main Functions	BLF, Speed Dial, Call Transfer, Call Pickup, Intercom
Compatible Phones	GRP2615, GRP2624, GRP2650, GRP2670, GXV3350, GXV3450
Power Supply	12V DC for Multiple Modules
Dimensions	210 x 124 x 33.5 mm
Unit Weight	Approx. 360 g
Package Weight	Approx. 700 g
Certifications	FCC, IC, CE, RCM
Application	Business Offices, Reception Desks, Call Centers, Executive Offices
Connection	Daisy Chain Expansion
Use	Extension Monitoring and Call Management

Trusted Partner in Network Communications
Established in 2017 and headquartered in Shenzhen, YIBOTE INFORMATION TECHNOLOGY CO.,LTD is a dedicated provider in the IT services market, specializing in the R&D, design, sales, and distribution of core network communications equipment and general accessories.
As distributors and resellers for leading global brands, we offer a comprehensive portfolio including:
Networking Routers & Switches
Firewalls & Security Appliances
Servers & Storage Solutions
IP Phones & Video Conferencing Systems
Wireless Access Points (APs)
Power Distribution Units (PDUs)
Modules & Associated Components
Our Commitment to Excellence:
Leveraging our experienced and skilled team in Shenzhen (with its excellent transportation links), we deliver high-quality products, effective solutions, and responsive service. We pride ourselves on:
Stable Supply & Reliable Delivery: Consistent product availability and dependable shipping.
Competitive Pricing: Cost-effective solutions without compromising quality.
Timely Support: Proactive assistance from order to post-sale.
Custom Solutions: Welcoming OEM and ODM project collaborations.
Global Reach:
Our products and solutions serve customers worldwide, with significant exports to the Middle East, Africa, the Americas, Europe, and Asia.
Partner With Us:
Whether sourcing from our extensive inventory or seeking engineering support for your project bid, our dedicated business team is ready to assist. Our service commitment begins the moment we receive your order, extending far beyond the invoice.
We warmly welcome customer visits and business negotiations. Let's collaborate for mutual success and growth.
Grandstream GBX20 Extension Module for Business IP Phone Call Management

Why Global Customers Choose Us

Complete IT Solutions

One-Stop Technology Partner

Providing a complete portfolio covering enterprise networking, AI computing, data center infrastructure, unified communications, and smart office solutions.

Reliable Supply Chain

Stable Source, Trusted Products

Strong supply chain capabilities ensure genuine products, competitive pricing, stable availability, and reliable project support.

Technical Expertise

Beyond Hardware Supply

Professional support including product selection, solution consulting, network planning, system integration, and technical assistance.

10+ Years Global Export Experience

Serving Customers Worldwide

More than a decade of international trade experience enables smooth communication, efficient order management, export support, and global delivery coordination.
Grandstream GBX20 Extension Module for Business IP Phone Call Management

Q1:Who we are?

We specialized in IT products and Solutions for more than 16 years in China.

Q2: What are your main products?

Our main supply network routers, network switches,network firewalls,Wireless access point,network firewall,Unified communications,Networking accessories,Servers,Storages,Optical Access network,Video Surveillance ,Consumer and office equipment.

Q3:Does your company sell used IT hardware ?

We carry both new and used hardware from various manufacturers . we agent of many famous brand ,Additionally,We get all of our used equipment from working environments. Most of our inventory comes from companies and organizations that are liquidating their assets either because of a bankruptcy, downsizing or perhaps they are upgrading.

Q4: How can I order from your company?

You can easily place orders.We accept your orders by phone, email, WhatsApp and WeChat .

Q5: How soon will my order be shipped?

1-3 working days for in-stock items and ex-stock items will be 4-6 weeks.

Q6: What shipping carriers does your company use, and how may I contact them?

Our company uses several different shippers depending on the size and weights of the items. Most products ship via FedEx ,DHL or UPS . Please visit the shippers' websites for additional contact information.

Q7: What type of warranty that your company provide?

Buy with confidence! We place our faith in our quality, so much that we offer a FREE one-year warranty on new hardware purchases.Warranties can also be extended for two or three years for an additional fee. And offer 90days warranty on used hardware purchase.

About the Supplier

This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR252992". Items marked "" are certified.

Shenzhen Yibote Information Technology Co.,Ltd

Company Profile

SHENZHEN YIBOTE INFORMATION TECHNOLOGY Co., Ltd is a professional global IT infrastructure supplier and technology solutions provider specializing in enterprise networking, data center infrastructure, AI computing systems, unified communications, and smart office solutions.
With years of experience in the ICT industry, we serve a wide range of customers including government organizations, enterprises, educational institutions, healthcare providers, system integrators, engineering contractors, cloud service companies, and data center operators. Our mission is to help organizations build secure, efficient, scalable, and future-ready digital infrastructures through high-quality products, professional services, and complete technology solutions.
Enterprise Networking Solutions

Enterprise routers and core switches
Managed and unmanaged Ethernet switches
Industrial switches
Wireless access points (WiFi solutions)
WLAN controllers
Firewalls and network security devices
Optical transceivers and network accessories
Structured cabling solutions

Our networking solutions support various applications such as enterprise office networks, industrial networks, campus networks, government projects, smart buildings, and multi-site branch connectivity.
Servers, Storage & AI Computing Infrastructure

Enterprise servers
Storage systems and disk arrays
Backup solutions
Hyper-converged infrastructure (HCI)
AI training servers
AI inference servers
GPU computing platforms
Data center solutions

We support AI companies, cloud service providers, research institutions, IDC operators, and enterprises requiring high-performance computing, large-scale data processing, and reliable IT infrastructure.
Video Conferencing & Unified Communication Solutions

Video conferencing systems
Conference cameras
Speakerphones and microphones
Professional audio systems
Recording solutions
Remote collaboration platforms

Our solutions enable efficient communication for corporate meetings, hybrid workplaces, online training, government conferences, and global business collaboration.
Smart Office & Interactive Display Solutions

Interactive flat panels
Smart whiteboards
Digital signage displays
Educational interactive displays
Meeting room collaboration systems

These solutions are widely used in enterprises, schools, training centers, exhibition halls, government facilities, and modern smart offices.
Trusted Global IT Hardware Partner
YIBOTE works with many internationally recognized technology brands and provides customers with reliable sourcing channels, competitive pricing, and professional technical support.
Our advantages include:
One-Stop IT Procurement
From networking equipment and servers to AI computing, communication systems, and smart office products, customers can complete their IT procurement through one trusted supplier.
Reliable Supply Chain & Genuine Products
Based in Shenzhen, we maintain strong relationships with professional supply channels and provide brand-new, authentic products with quality assurance and warranty support.
Professional Technical Support
Our experienced team provides product consultation, solution design, equipment selection, network planning, system deployment, and after-sales service.
Flexible Cooperation Models
We support project procurement, wholesale supply, system integration partnerships, channel distribution, and customized IT solutions for different business requirements.
Industries We Serve
Our solutions are widely applied in:

Government and public sector projects
Enterprise IT infrastructure upgrades
Manufacturing and industrial networks
Schools and universities
Healthcare information systems
AI computing and data centers
Cloud computing environments
Industrial parks and smart building

YIBOTE-Connecting Technology, Empowering Business, Building the Digital Future.

About Our Factory & Business Background

Business Type: Trading Company
Address: B617, Bantian International Center, Bantian Street, Longgang District, Shenzhen, Guangdong, China
Plant Area: 300 square meters
Number of Employees: 6
Registered Capital: 5,000,000 RMB
Terms of Payment: T/T, D/P, LC, PayPal, Western Union, Small-amount payment
International Commercial Terms(Incoterms): FOB, CIF, CFR, EXW
Average Lead Time: Peak Season Lead Time: 1-3 months
Off Season Lead Time: within 15 workdays
Nearest Port: Shenzhen Port; Hong Kong Port; Guangzhou Port
Minimum Order Quantity: 1 PCS
Supply Chain Partners: 25

Our Production Capability & Technical Expertise

Main Products: IT Networking Equipment, Optical Fiber Communication, Network Router, Network Switch, Wireless Access Point, VOIP Phone, Smart Meeting Tablet
QA/QC inspectors: 1 people
Inspection Type for Finished Products: Random inspection(Visual inspection & Function inspection)
Inspection Method for Finished Products: Finished product checked by packing staff
Customization Options: Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
ODM Service Available: Yes
OEM Service Available: Yes
R&D Engineers: 1 people
Own Brand: Yes

Our Industry Experience & Global Business Record

Year of Establishment: 2017-05-22
Export Year: 8 years
Main Markets: North America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea)
Repeat Buyers Choice: 80%~100%
Number of Foreign Trading Staff: 2
Overseas Agent/Branch: No
New Products Launched in Last year: No

FAQ

What is the Grandstream GBX20: The Grandstream GBX20 is an IP phone extension module designed to expand contact management and call control capabilities for compatible Grandstream IP phones.
How many contacts can one GBX20 support: One GBX20 supports up to 40 contacts or extensions through two pages with 20 programmable keys per page.
How many GBX20 modules can be connected together: Up to four GBX20 modules can be daisy chained to support up to 160 contacts or extensions.
Which Grandstream phones are compatible with GBX20: The GBX20 is compatible with GRP2615 GRP2624 GRP2650 GRP2670 GXV3350 and GXV3450 IP phones according to current Grandstream product information.
Does GBX20 support BLF: Yes. The GBX20 supports busy lamp field functions for monitoring extension and call status.
Can GBX20 support call transfer and call pickup: Yes. The GBX20 supports call transfer and call park pickup functions for efficient business call handling.
Is GBX20 suitable for receptionists: Yes. The GBX20 is designed for users who manage high volumes of incoming calls and need efficient contact monitoring and call dispatching.
What are the main applications of GBX20: Typical applications include reception desks executive offices call centers corporate offices and other business environments requiring expanded extension monitoring and call management.