The Kaer IP Phone is a VoIP communication terminal device independently developed and manufactured by Shandong Kaer Electric Co., Ltd. It is entirely based on the SIP (Session Initiation Protocol) protocol, enabling high-quality voice, video, and multimedia communication via IP networks. As a true deskset SIP phone , it completely eliminates the dependence on physical copper wires or telephone lines found in traditional PSTN analog phones. Users simply need to connect the device to their corporate LAN, broadband internet, or Wi-Fi wireless network to enjoy high-definition voice calls, video conferencing, intelligent call routing, and a rich unified communications collaboration experience anytime, anywhere.
As a dedicated SaaS hardware provider , Kaer has built a complete product portfolio, ranging from entry-level basic SIP phones to high-end Android large-screen video IP phones. We offer highly flexible customization services, including in-depth customization of appearance design, functional modules, firmware logic, and interface branding. Meanwhile, Kaer possesses strong ODM/OEM manufacturing capabilities, enabling global customers, brand owners, integrators, and channel partners to quickly develop and launch their own branded IP phone product lines, shortening time-to-market, reducing development costs, and achieving a differentiated competitive advantage.
The core working principle of the Kaer IP Phone is to convert the user's analog voice signal into digital data packets using advanced encoding and decoding technology, and then use the SIP v2 protocol (strictly following the RFC3261 standard) to complete signaling interaction and session establishment. Voice data packets are transmitted in real time via the RTP/RTCP protocol, while supporting SRTP encryption to ensure call privacy and security. To cope with various complex network environments, the device incorporates NAT traversal technologies such as STUN, TURN, and ICE, and supports multiple transmission methods including UDP, TCP, and DNS-SRV, maintaining stable connections and uninterrupted calls even under firewalls, multi-layer NAT, or bandwidth fluctuations.
A deskset SIP phone using PoE (Power over Ethernet) or a Wi- Fi SIP phone supporting 2.4/5GHz dual-band Wi-Fi , all Kaer hardware terminals are seamlessly compatible with mainstream IP-PBX systems (such as Asterisk, FreeSWITCH, and 3CX), various cloud PBX platforms, and third-party SaaS communication services. Kaer's self-developed firmware system integrates multiple enterprise-level audio optimization algorithms, including AEC (Acoustic Echo Cancellation), AGC (Automatic Gain Control), ANR (Automatic Noise Reduction), VAD (Voice Activity Detection), and CNG (Comfort Noise Generation). These technologies work together to ensure clear, natural, and noise-free call quality in noisy office environments, open-plan workspaces, or remote conferencing scenarios.
Kaer ha developed a diverse range of IP Phone products for different industries and usage scenarios, mainly categorized as follows:
Hardware IP Phone : Basic SIP phone / Deskset SIP phone : Classic models such as the KS31 series are equipped with dual gigabit LAN ports (supporting PoE power supply), a 2.8-inch high-definition LCD display, and can be configured with 2-6 SIP accounts. It has physical buttons and hands-free function, making it very suitable for daily desktop office work and employees of small and medium-sized enterprises with moderate call volume.
Wi-Fi SIP phone : A model that supports wireless Wi-Fi connectivity, eliminating the need for additional network cables. It offers extremely flexible installation and deployment, making it suitable for temporary office areas, shared workspaces, hotel rooms, or scenarios requiring frequent relocation.
Hotel SIP phone : Tailor-made for the hotel industry, it supports one-click calls to the front desk, room service, wake-up service, do-not-disturb mode, bill inquiry and other hotel features, and can be deeply integrated with property management system (PMS) to achieve intelligent room communication management.
Business SIP Phone : Flagship products for medium and large enterprises, such as Android video IP Phones equipped with a 10-inch capacitive touch screen, supporting multi-party high-definition video conferencing, built-in Bluetooth headset pairing, dual-band Wi-Fi, PoE+ power supply, USB interface expansion, etc., suitable for high-end application scenarios such as modern conference rooms, executive offices, and remote collaboration centers.
Kaer offers a companion mobile app (iOS/Android) and desktop client (Windows/macOS) for softphones, enabling features such as unified accounts, synchronized calls, multi-device answering, and status synchronization, further enhancing the user's mobile office experience.
Specialized/industry-customized models include portable Bluetooth SIP phones, Wi-Fi phones designed for children/elderly, and industrial-grade dustproof and waterproof models, meeting the specific needs of vertical industries such as education, elderly care, and outdoor work.
Call costs have dropped significantly: especially for cross-border international long-distance calls, which are almost free or at very low rates, saving up to 70%-90% compared to traditional operator rates.
It boasts an extremely rich set of features: supporting intelligent call forwarding, three-way/multi-way conferencing, voicemail to email conversion, IVR automatic voice navigation, real-time call recording, caller ID/caller blacklist, full-duplex hands-free calling, advanced noise reduction algorithms, busy indicator lights, and dozens of other enterprise-level features.
Extremely flexible deployment and use: perfectly supports remote and hybrid work modes, simultaneous ringing of multiple terminals, and seamless answering across regions; fully compatible with advanced network functions such as IPv4/IPv6 dual protocol stack, VLAN network isolation, TR069/TR104 remote batch management, and OpenVPN secure tunnel.
Strong scalability and integration capabilities: Seamlessly integrates with CRM systems such as Salesforce and HubSpot, collaboration platforms such as Microsoft Teams, DingTalk, and WeChat Work, as well as various cloud call center solutions. As a SaaS hardware provider , Kaer offers deep customization services from hardware to firmware , ensuring that products are 100% compatible with customers' unique business processes.
Industry-leading call quality: Under high-quality network conditions, it supports broadband/HD codecs such as Opus, G.722, and G.729 to achieve near-face-to-face voice clarity.
Strong ODM/OEM production and service capabilities: From product appearance ID design, silkscreen logo printing, button layout, firmware secondary development, UI skin customization, packaging box design to whole device testing and shipment, Kaer provides one-stop full-process support to help customers realize branded products at the lowest cost and in the shortest cycle.
Kaer IP Phones are built entirely on modern IP networks and the SIP open protocol architecture, while traditional analog phones rely on outdated copper PSTN lines. In contrast, Kaer solutions offer a significant advantage in long-distance/international call costs, far exceeding traditional solutions in terms of feature richness (supporting video, multi-party conferencing, and third-party system integration), virtually unlimited scalability (cloud management, unlimited extensions), and flexible deployment options (wired, wireless, PoE, placement is flexible), making them particularly suitable for today's popular remote and hybrid work models. However, it's important to note that Kaer IP Phones rely on a stable power supply and internet connection (power outages or internet disconnections will cause call interruptions), while some traditional phones can maintain basic call functionality even during power outages. Emergency calls (such as 911) require proper location information configuration with the service provider.
Stable broadband internet access (10Mbps uplink and downlink speeds recommended, wired or Wi-Fi is acceptable).
SIP account services compatible with Kaer devices (available from cloud PBX, carrier VoIP services, and self-built IP-PBX).
The Kaer IP Phone terminal device itself (standard package includes PoE support, power adapter, handset/headphone jack and other complete accessories).
For high-end Android models, third-party applications can be installed to further expand functionality (such as calendar integration, third-party software codecs, etc.).
Small and medium-sized business owners: Seeking cost-effective basic SIP phones or deskset SIP phones to quickly replace outdated analog telephone systems.
Remote/hybrid work teams rely on the wireless flexibility and seamless switching between multiple devices offered by Wi-Fi SIP phones .
The hotel and guesthouse industry needs hotel SIP phones to enable intelligent communication in guest rooms and efficient collaboration with the front desk.
Call centers and corporate headquarters: prefer the video conferencing, high-definition noise reduction, and large-screen interactive capabilities of business SIP phones .
Government, education, and medical institutions value the high stability and security of the equipment, as well as the deep customization capabilities offered by Kaer.
Global brand owners, distributors, and system integrators: Leverage Kaer's mature ODM/OEM supply chain to quickly launch their own brand IP Phone series and seize market opportunities.
In the context of the comprehensive transformation of enterprise communications towards cloudification, intelligence, and convergence, Kaer IP Phones are becoming the preferred solution for many organizations to improve internal collaboration efficiency and significantly reduce communication costs. Whether your current needs are for an entry-level basic SIP phone , a portable and flexible Wi-Fi SIP phone , a hotel-specific SIP phone , or a powerful business SIP phone , Kaer can provide stable, reliable, and high-performance hardware terminals. Leveraging its industry-leading customization capabilities and ODM/OEM manufacturing strength, Kaer can perfectly meet your personalized and branded needs.
1. What are the fundamental differences between Kaer IP Phones and traditional analog phones?
Kaer IP Phones operate based on the SIP protocol and IP networks, while traditional analog phones rely on copper PSTN lines. Kaer solutions not only significantly reduce call costs (especially international calls are almost free), but also support a wealth of features such as HD video, multi-party conferencing, CRM integration, and remote management. Deployment is also more flexible, requiring no complex cabling, making it particularly suitable for remote work and hybrid work models. As a SaaS hardware provider, Kaer also offers deep customization and ODM/OEM services to help enterprises build their own branded communication systems.
2. Does a Kaer IP Phone require internet access? What happens if the network is interrupted?
Yes, Kaer IP Phones require a stable broadband internet connection (wired or Wi-Fi) to function properly. Calls will be interrupted when the network or power is off; this is a common characteristic of all VoIP devices (unlike some traditional phones that can continue to function even after a power outage). To improve reliability, it is recommended to use a UPS uninterruptible power supply or a dual-network backup solution. Kaer devices support IPv4/IPv6 dual-stack, VLAN, and OpenVPN, maintaining maximum stability in complex network environments.
3. Is Kaer IP Phone difficult to install and set up? Does it require professional personnel?
Installation is very simple. Most deskset SIP phones and basic SIP phones only require plugging in an Ethernet cable (PoE power supported), connecting to a power source, and then completing the configuration by entering SIP account information through the web management interface or mobile app. It usually takes 5-10 minutes to go online. Kaer provides detailed Chinese and English operation manuals, video tutorials, and TR069 remote batch management functionality, enabling enterprise users to deploy thousands of devices with one click. For customers requiring deep customization, our engineering team will provide full technical support.
4. Which platforms and system integrations does Kaer IP Phone support?
The entire Kaer IP Phone series is compatible with almost all mainstream platforms, including Asterisk, FreeSWITCH, 3CX, BroadSoft, Microsoft Teams, Zoom Phone, and major carrier cloud PBXs. It also supports integration with CRM systems such as Salesforce and HubSpot, and seamlessly integrates with hotel PMS and call center software. Business SIP phones and Android large-screen models also support the installation of third-party apps to further expand functionality. As a professional ODM/OEM manufacturer, we can customize exclusive integration protocols according to customer needs.
5. Does Kaer support product customization and branded production?
Fully supported! As a focused SaaS hardware provider, Kaer offers full-process customization services, from appearance ID design, silkscreen logo printing, button layout, firmware functions, UI interface to packaging. Whether it's a Wi-Fi SIP phone, hotel SIP phone, or business SIP phone, we can help brand owners and integrators quickly launch their own branded product series, helping you seize market share. Welcome to contact us to discuss ODM/OEM cooperation details.
