Shenzhen Letel Technology Co.,Ltd*User Manual for TVP304
unsupported power adapters would not be covered by the manufacturer’s
warranty.
3 Product Overview
TVP304 IP Phone is a next generation IP network telephone based on
industry open standard SIP (Session Initiation Protocol) and H.323. Built
on innovative technology, TVP304 IP Phone features market leading
superb sound quality and rich functionalities at massaffordable price.
3.1 Key Features
Support two models: Bridge and Router(NAT&NAPT)
Network Protocols: TCP/UDP/IP
、
ICMP
、
HTTP
、
DHCP
Client
（
WAN Interface
）、
DHCP Server
（
LAN Interface
）、
DNS
Client
、
DNS Relay
、
SNTP
、
PPPoE
、
FTP
、
TFTP
VoIP Protocols: Support H323 (V4)&SIP (RFC3261, RFC3262,
RFC3264, RFC3265) synchronously
Voice
Codecs:
G.711
（
A-law/U-
law
）、
G.723.1
、
G.729A/B
、
G.726
，
and G.722
Redundancy SIP server (or Gate Keeper): Can auto swap address
between two servers address
NAT transversal: Support STUN client, AVS and Citron etc . Can
modify SIP register port
、
HTTP server port
、
Telnet server port and
RTP port
Support two SIP server synchronously
：
Can register two different
SIP server, and can make a call by either proxy
Support standard voice features such as numeric Caller ID Display,
Call Waiting, Hold, Transfer, Do-Not-disturb, Forward, in-band and
out-of-band DTMF, Hotline (off hook autodial), auto answer,ban
outgoing
Full duplex hands-free speakerphone, redial, call log, volume control,
voice record with indicator
Support standard encryption and authentication (DIGEST using MD5,
5
