Need help?Do you have a question about the ATCOM A20 and is the answer not in the manual?
General| HD Audio | Yes |
|---|---|
| Headset Port | RJ9 |
| Local Phonebook | Up to 500 entries |
| Protocols | SIP (RFC3261) |
| Codecs | G.711(A/μ), G.722, G.723.1, G.726, G.729AB, iLBC |
| Network Interface | 10/100 Mbps Ethernet |
| Power Supply | DC 5V/1A |
| Supported Languages | English, Chinese |
| SIP Accounts | 2 |
| Features | Call hold, call waiting, call transfer, call forwarding, 3-way conferencing |
| Power over Ethernet | IEEE 802.3af |
Lists physical ports like DC power, LAN, PC, headset, and handset.
Details LCD size and CPU specifications of the IP phone.
Describes SIP, codecs, call features, phone book, languages, and BLF.
Covers LAN support for bridge mode, VLAN, VPN, DNS, DHCP, and QoS.
Details safe mode, firmware updates, user management, web config, and logs.
Lists network protocols like IEEE 802.3, DHCP, SIP, TCP/IP, RTP, DNS, TFTP, HTTP.
Lists certifications like CE, FCC, and RoHS compliance.
Details items included in the package, like phone, handset, and cables.
Explains how to connect the IP phone to a network and access its web interface.
Explains the function of each button and screen element on the IP phone.
Describes the status and meaning of the line key LEDs.
Details the status indicator LED behavior for different phone states.
Explains the LED status for programmable keys and their meanings.
Explains the meaning of various icons displayed on the LCD screen.
Details how to answer calls using handset, speaker, or headset.
Explains how to make calls using handset, speaker, headset, or phone book.
Describes how to dial a number before picking up the handset or speaker.
Explains how to hang up a call using handset or speaker.
Details how to hang up a call while using a headset.
Explains how to hang up a call when handling multiple calls.
Describes attended and blind call transfer procedures.
Explains how to access and configure voicemail settings.
Details how to mute and unmute the microphone during a call.
Guides on initiating and managing a 3-way conference call.
Explains how to view missed, answered, and dialed call records.
Explains how to view the phone's IP address on the screen.
Provides three methods for performing a factory reset on the phone.
Details steps for upgrading the phone's firmware via a TFTP server.
Explains the procedure for making a direct IP call.
Lists common reasons and checks for phone registration failures.
Provides steps to troubleshoot issues with obtaining an IP address.
Offers solutions for audio issues where only one party can hear.
To Next Page
