Enterprise IP Phone KV-M4S20-P

Overview

The KV-M4S20-P IP phone from the Radonium series is a highly advanced enterprise phone designed to handle very heavy call traffic. This exceptional device features three color displays (a 4.3-inch main display and two 2.4-inch side displays), 20 SIP lines and up to 60 programmable DSS keys. The ability to receive video calls, dual Gigabit Ethernet ports with PoE, built-in Bluetooth and Wi-Fi connectivity via a dongle make it the most complete communication tool for senior executives.

Technical specifications

Datasheet (PDF)

Model: KV-M4S20-P

Generic

Specification: 20 SIP Lines 3 LCDs (Main + DSSJ) HD Voice Intelligent DSS Keys PoE Enabled Support receiving Video call
Phone Functions: Action URL/Active URI Blocked/Allowed List Call logs (In/Out/Missed, 1000 entries) Local Phonebook (2000 entries) Programmable DSS/Soft keys Support Wi-Fi Dongle
Call Functions: 6-way Conference Anonymous Call (Hide Caller ID) Auto-Answering Call Forward (Always/Busy/No Answer) Call Hold/Resume Call out,Answer,Reject Call Parking/Pick-up (Depending on server) Call Transfer (Attended/Unattended) Call Waiting Caller ID Display Do Not Disturb Hot desking Hot Line Intercom Mute/Unmute (Microphone) Redial Speed Dial Voice Message (With server)
Video: Video call resolution: QCIF/CIF/VGA Video codec: H.264

Deployment & Management

Deployment & Management: Auto-Provisioning via FTP/TFTP/HTTP/HTTPS/DHCP OPT66/SIP PNP/TR-069 Configuration Export / Import Firmware Upgrade Packet Dump Phonebook Import/Export Syslog Web Management Portal Web-based Packet Dump

Physical Specifications

Main LCD x1: 4.3-inch (480x272) Color Screen
DSS Key: 2.4-inch (240x320) Color Screen
Keypad: 51 keys
HD Handset: 1.5M CAT5 Ethernet Cable x 1
Standard RJ9 Handset: 1 x Wire
Status Indicator Light: x1 (Red)
RJ9 Port x 2: Handset x1, Headset x1
RJ45 Port x2: Network x1 PC x1 (Bridged to Network)
USB2.0 Port x1: Connect with Wi-Fi/BT USB dongle or Flash Driver Standard A
Safety Keyhole: x1
Power Input: DC 5V/2A or PoE
Power Consumption (PoE): 1.49W~6.88W
Power Consumption (Adapter): 0.94W ~5.47W
Working Temperature: 0°~45°C
Working Humidity: 10%~95%
Weight: 1.150 Kg

Audio

Audio: DAC 16KHz Sampling HAC handset HD Voice Microphone Speaker (Handset/Hands-free, 0~7KHz Frequency Response) Wideband ADC
Narrowband Codec: AMR, G.711a/u, G.723.1, G.726-32K, G.729AB, ILBC
Wideband Codec: AMR-WB, Cous, G.722

Network

Physical: dual bridged port for PC bypass Physical: 10/100/1000 Mbps Ethernet
IP Configuration: 802.1x DHCP Network Access Control PPPoE Static IP
VPN: L2TP, OpenVPN
VLAN: VLAN / LLDP / Qo5/ RTCP-XR (RFC3611) VQ-RTCPXR, (RFC6035)
WIFI (Optional): WI-FI Security Mode: WPA/WPA2-PSK/802.1X EAP

Network & Management

IP Mode: IPv4/IPv6/IPv4&IPv6

Protocols

Protocols: 802.1p/Q 802.1x AES128 & AES256 DHCP FTP/TFTP HTTP/HTTPS IPv6 L2TP LLDP OpenVPN PPPoE RTP/RTCP/SRTP(Optional/Compulsory) SIP v1 (RFC2543) v2(RFC3261) SNTP STUN TR-069 UDP/TCP/TLS

General

Installation: Desktop Stand; Wall-mounted (need an additional wall hanging parts)

Downloads

Documentation

KV-M4S20-P

DatasheetPDF449.3 KB

Download

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Frequently asked questions

Questions about this product

Do IP phones need routine maintenance?

Yes. Regular checks of the connections, software status, equipment health, temperature and error logs can prevent sudden failures.

How can I troubleshoot an IP phone fault more quickly?

Record the problem precisely and note when it occurs and under what conditions. Then check the power, connections, settings and logs step by step.

What information should I include when requesting support for an IP phone issue?

It is very helpful to provide the exact model, the serial number (if available), the firmware version, a description of the problem and when it started, the status of the indicator lights or any error messages, and any relevant images or logs.

Does a large IP phone project need a dedicated design?

Yes. Large projects should be designed as an integrated whole, taking capacity, redundancy, management, security, power and future expansion into account.

Why is it important to document an IP phone system?

Keeping drawings, network addresses, settings, port numbers and repair records on file makes troubleshooting and future expansion faster and less costly.

Frequently asked questions: IP Phones

Answers to common questions about this product line, from the KDT Help Center.

Why isn't my IP phone working properly?

First check the power, the cable or connection, the settings, the network address and the software status. Then you can move on to more in-depth checks and the logs.

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Where should I start when choosing the right IP phones?

Start by defining the intended use, the number of devices, the installation environment, the capacity required and your plans for future expansion. Then choose the model and technical specifications based on what the project actually needs.

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Which technical specifications matter most for IP phones?

Depending on the project, the most important specifications are capacity, speed, compatibility, environmental ratings, management features and scalability. Basing your choice on a single figure is usually not enough.

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Is a cheaper IP phone model always the right choice?

No. The purchase price is only one factor. You also need to consider reliability, features, service life, after-sales service and maintenance costs.

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How do I work out how much capacity an IP phone system needs?

Base the calculation on the number of devices, actual usage, how long the system will be in use and how much the project is likely to grow. It is also wise to keep some capacity in reserve.

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