Huawei eSpace 6870 User Manual page 15

EchoLife ET685 IP Phone User Manual
Item
Function keys
Device management
Audio features
Specification
RFC 3428
Up to 50 incoming IM messages can be stored. If more
than 50 incoming IM messages are present, the system
drops the latest IM message.
Eleven dedicated keys: Hold, SEND, SPEAKER,
Headset Mode, TRNF (transfer), CONF (conference),
MUTE/DEL, DND, INTERCOM, Phone Book, and
MSG (message)
Five navigation keys
Seven multi-purpose keys and four XML
programmable soft keys.
Upgrade of the NAT-friendly remote software (through
TFTP or HTTP) for the devices that are deployed behind
the firewall or the NAT
Address book function
Handset, Hand-free, and headset modes in full duplex
Advanced DSP
Dynamic negotiation of codec and voice payload length
HD Voice
Supporting the G.723.1 (6.3K or 5.3K), G.729A/B, G.711
µ/A, G.726-32K, G.722 (broadband), and iLBC CODECs
In-band and out-of-band DTMF (in audio, RFC2833, or
SIP INFO mode)
Echo Cancellation
Supporting the side tone cancellation, advanced jitter
buffer control, and packet delay and loss concealment.
9
2 Product Overview