Huawei EchoLife ET323 User Manual page 13

EchoLife ET523 IP Phone User Manual
Table 2-3 Technical specifications of the ET523
Item
Lines
Supported protocol
Display
Function keys
Device management
Audio features
Specification
4 direct lines with 7 speed dial keys and up to 11
concurrent calls.
Additional 112 speed dial keys are expanded through
connecting two ET523 EXTs.
SIP 2.0, TCP/UDP/IP, PPPoE, RTP/RTCP, SRTP by
SDES, HTTP, ARP/RARP, ICMP, DNS, DHCP,
NTP/SNTP, TFTP, SIMPLE/PRESENCE protocols.
Supporting multiple SIP accounts and up to 11 media
channels at the same time.
Supporting SIP PUBLISH method (RFC 3903), SIP
Presence package (RFC 3856, 3863) for the use of 7 MFKs
and ET523 EXT, SIP Dialog package (RFC 4235).
Supporting SIP MESSAGE method (RFC 3428).
Up to 100 incoming IM messages can be stored (drops the
latest IM message).
8 lines ×22 characters; The pixel is 131 ×64.
Seven dedicated keys: MSG (message), Hold, TRNF

(transfer), CONF (conference), SPEAKER, SEND,
MUTE/DEL

One menu key and four navigation keys

LED indicators that can be on in two colors.
Supporting the upgrade of the NAT-friendly remote
software (through TFTP/HTTP) for deployed devices
including behind the firewall/NAT, auto/manual
provisioning system, GUI interface, and address book.
Supporting Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3
QoS (ToS, DiffServ).
Supporting the ET523 extension board and diagnostic
mode for keys on ET523 extension board.
Hands-free, handset and headset modes in full duplex.
Advanced DSP.
Dynamic negotiation of codec and voice payload length.
Supporting the G.723,1 (6.3K), G.729A/B, G.711 µ /A,
G.726-32K, G.722 (wideband), GSM and iLBC CODECs.
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2 Product Overview