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SIP = Session Initiation Protocol 15年前已開始開發的
VoIP 語音通話為主之協定, 但這10年間由 H.323
協定主導了 VoIP 發展 (可能是錯誤地主導), H.323
是一種多媒體廣泛協定, 其企圖想包含所有通訊,
圖像, 視像協定, 結果造成了大量不實用封包浪費. 這10年間,
H.323的 "假大空"
浪費了全世界大量網絡及硬體資源 . 近年由 SIP
重振雄風, 燃點新一代 VoIP 語音通話之希望 ! VoSIP
SIP = 專; 精; 簡; 快; 聰明之實用語音通話協定, 請按此多看最新
VoSIP 資料 |
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| H.323 Voice over IP (VoIP)
gateway providing real time voice and fax transmission over IP networks. H.323
is specially designed for SME or international corporations who spend vast
amount of money on branch-to-branch communication. |
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By deploying H.323, voice and
fax calls, no matter they are made in the office or outside of office, all
can be routed through Internet and the long distance calls charges can be
eliminated.
Equipped with powerful CPU and DSP,
H.323 utilizes advanced compression, echo cancellation, and robust
voice and fax recovery algorithm to provide toll quality voice over IP
networks. Supporting various types of Internet access, such as ADSL, cable
modem and leased line, H.323 can provide value added voice application
over the company's existing data network. Easily integrated into any PBX
system, H.323 provides immediate cost saving without any impact on the
company's telephone system. Much more outstanding features, such as NAT
router function, embedded gatekeeper, NAT pass through, bandwidth control
etc, make H.323 the ideal VoIP solution for enterprises seeking to
significantly reduce their telecommunication cost.
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| Features
and benefits |
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Dynamic
IP Support |
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The VoIP
gateways available in the market today require fixed IP address to
determine its location in the Internet. That causes inconvenience to many
dial-up and broadband VoIP applications users those don't have fixed IP
address. The H.323, however, allows existing addressing schemes to
remain without the need of fixed IP address. H.323 can directly connect
to the DHCP Enabled cable modem, or PPPoE equipped ADSL modem, which uses
dynamic IP address to link to Internet. |
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Flexible
Telephony Interface |
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H.323
provides FXS and FXO interface to be flexibly integrated into any existing
telephone system. It can be connected directly to an analog phone, fax
machine, key phone system or PBX system. Users can use the original
telephone sets on their desk to make VoIP calls as well. It is simple and
easy. No additional user training is required. |
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Quality
of Service |
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You may
say, "Well, voice over Internet is great, but the voice quality is
terrible." It certainly does not apply to H.323. The 802.1p and
Type of Service (ToS) feature of H.323 VoIP Gateway guarantees
end-to-end voice quality in a managed network. In addition, when
interfacing to a very unstable Internet network where it is most likely to
encounter a 20% data loss rate, users may hear chopped, low-quality voice.
The unique robust voice/fax recovery algorithm of H.323 can largely
compensate the data loss rate effect of the Internet and give users a
stable voice quality. |
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Optional
Embedded Gatekeeper |
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H.323
has an embedded gatekeeper to simplify the dialing procedure of your VoIP
network. This H323 standard gatekeeper supports registration constraints,
individual grouping and other basic gatekeeper functions. |
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NAT
Router function |
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This
feature allows local network users connect to the Internet using only one
public IP address. It supports virtual server, DMZ, packet filtering and
DHCP server function. However, if your network already has a router there,
H.323 can still be configured to pass through any general NAT router. |
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Bandwidth
Control |
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Providing
built-in traffic shaping and bandwidth control functions, H.323 can
efficiently control and manage the bandwidth of data traffic by various
shaping policies, such as IP address range, service types and priority
etc. This considerably enhances the quality of services, especially
reducing voice latency, and improving network efficiency without the need
of extra expensive traffic management hardware. |
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4
ports Lan Switch |
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Providing
optional built-in 4 ports Lan Switch, can connect four Lan Hubs or Lan
switch for a SME or corporate Networks. or direct connect 4 PC for Home
use. |
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Scalability |
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You can
flexibly stack a couple of inexpensive H.323 together to obtain a
higher port density whenever you need to expand your voice service scale.
You don't need to make a huge investment at the beginning of your new
venture while the future business remains uncertain. Moreover, in
conjunction with our innovative IP address sharing mechanism, you only
need a single IP for all the stacked gateways. |
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Advanced
Dialing Plan |
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Advanced
dialing plan and address mapping make connection to PABX a simple job. It
gives versatile and flexible dialing to any destinations. Moreover, H.323 can be configured to use wildcard as its PABX extensions,
significantly simplifying dialing plan for Intranet VoIP applications. |
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Anti-Line-Seizure
Mechanism |
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H.323
supports an intelligent mechanism, patent pending, for detecting line
disconnection patterns between FXO interface and PABX or PSTN central
office switch. |
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Management
Tools |
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H.323
supports full remote management ability with its embedded Telnet server,
HTTP server and SNMP agent. H.323 also provides a real-time "voice
call monitoring" interface. This helps the system administrator
constantly aware of all the call statistics. |
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Interoperability |
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H.323
provides full compliance with the H.323 IP telephony standard, ensuring
its interoperability with leading third-party hardware and software. H.323
has been proved to be interoperable with Microsoft NetMeeting,
Cisco, Lucent, RadVision, NetSpeak and other H.323 v2/v3 compliant
equipments.. |
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| Specification |
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| Protocol
and Standard |
LEN
Indicators |
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ITU H.323 v2/v3/v4
compliant |
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LAN: 10/100M,
Collision, Link, Active |
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IETF TCP/IP, RTP,
SNMP v2, HTTP, |
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(Tx/Rx) |
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Telnet, DHCP, PPPoE,
Dynamic DNS |
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WAN: Link, Tx, Rx,
Collision |
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Line
(off-hook/ringing) |
| Voice
Processing |
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Power |
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ITU G.711/64kbps,
G.723.1A/5.3,6.3kbps, |
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G.729A/B/8kbps |
Power |
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Voice Activity
Detection (VAD) |
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100~240V AC, 50~60
Hz to 12V DC, |
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Comfort Noise
Generation (CNG) |
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1.2A power adapter |
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| Tone
Generation and Detection |
Environmental |
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TIA-464B DTMF, Dial,
Busy, Ring Back, |
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Humidity: 10~90%,
non-condensing |
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Call Progress |
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Operating temp: 0~50
degrees C |
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Storage temp: -10~70
degrees C |
| FAX
Relay |
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T.30 and T.38
real-time FAX compliant |
Dimension |
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Voice/FAX
auto-switch |
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RG-802: 190mm(L) x
110mm(W) x 35mm(H) |
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RG-804: 240mm(L) x
165mm(W) x 36mm(H) |
| Echo
Cancellation |
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RG-2500: 440mm(L) x
255mm(W) x 44mm(H) |
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G.165/G.168 with
8-16ms echo tail |
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Weight |
| Telephony
Interface |
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RG-802/RG-5002: 0.8
Kg |
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Flexible combination
of FXS and FXO |
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RG-804/RG-5004: 1.2
Kg |
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RG-802/RG-5002: 2
RJ-11 (FXS/FSO) |
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RG-2500: 4.4 Kg |
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RG-804/RG-5004: 4
RJ-11 (FXS/FSO) |
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RG-2500: up to 16
RJ-11 (FXS/FSO) |
Safety |
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UL1950, EN60950 |
| Network
Interface |
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2 Ethernet ports,
one for LAN, one for |
EMC |
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WAN |
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FCC part 15 Class B,
CE mark |
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10Base-T and
100Base-T, |
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IEEE802.3 compatible |
Vibration
and Drop |
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IEC 68-2-36, IEC
68-2-6, EC 68-2-32 |
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Ports assignment layout sample : any FXS, FXO
combination available,
only this VoIP gateway can fit all your requirement
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