EchoLife ET523 IP Phone User Manual
2 Product Overview
9
Item
Specification
In-band and out-of-band DTMF (in audio, RFC2833, SIP
INFO).
Silence suppression, VAD, CNG, and AGC.
AEC with AGC for headset, handset and speakerphone
modes.
Supporting the sidetone, adaptive jitter buffer control
(patent-pending) and packet delay & loss concealment.
Telephony features
Intuitive GUI, download of the phonebook (XML), MLS,
voice mail indicator, download of custom ringtones.
Call holding, call transferring (attended/blind),
Do-Not-Disturb, call forwarding, call waiting, call waiting
caller ID display, mute, redial, call log and volume control,
caller ID display or block, multi-party conference call,
dialing with a prefix, off-hook autodial, auto answer, early
dialing and speed dialing.
Supporting anonymous call by using privacy header.
Through the keypad/LCD, web browser, or secure (AES
encryption) central configuration file, manual or DHCP
network setup.
Support NAT traversal by using IETF STUN and
symmetric RTP.
Network and
provisioning
Supporting the IEEE 802.1p/Q tagging (VLAN), Layer 3
TOS.
Supporting firmware upgrade through the TFTP or HTTP;
Supporting authentication of configuration files before
changing.
Firmware upgrade
Providing the specific URL for users to download
configuration files and upgrade firmware files.
Advanced server
features
Message waiting indicator.
Supporting DNS SRV query and the Fail Over function of
the SIP server.
Supporting the customized idle screen by downloading
XML through HTTP/TFTP.
Security
DIGEST authentication and encryption by using MD5 and
MD5-sess, SRTP.
