SunComm Technology
 | This articleneeds additional citations forverification.(March 2011) |
| Company type | Public |
|---|---|
| Industry | Computer systems Computer hardware IT Services Electronics |
| Founded | 1977 as Multitech |
| Headquarters | , Taiwan |
Area served | Worldwide |
Key people | ChairmanGary Tseng |
| Products | Ethernet hub Voice over IP Gateways Servers Modem Payphone |
| Website | www |
SunComm Technology(Chinese:Tương quang khoa cổ phần công ty hữu hạn;pinyin:Xiāngguāngkē Gǔfèn Yǒuxiàn Gōngsī) is aTaiwanmultinational computer technology andGSMVoice over IPgatewaymanufacturer. The main products in 2010 focused on GSM VoIP gateways &IPsurveillance camera devices. Core members have been engaging in the communication & networks industry since 1977.[citation needed]
History
[edit]SunComm Technology Co., Ltd(Chinese:Tương quang khoa học kỹ thuật)
In 1977, developed communication & networks industry.
In 2007, developed GSM gateway.
In 2008, developed VoIP.
In 2010, developed GSM to VoIP Gateway.
Operations
[edit]
Dongguan,ChinaLiaison Office has
been set up at Guan-Dong Province to provide service fromTaiwanand China.
SunComm Technology Co., Ltdprovides:
Wifi IP Phone
gateway2, 4, 6, 8, 16, 24 ports
SIP Proxy Server for 200 users with 2, 4, 8 FXS, FXO embedded
SIP IP PBX with 72 SIP Line and 24 SIP Trunk
Web Call Server: with 10 concurrent call, 30 concurrent call
- GSM VoIP Device
GSMGateway (FWT)
GSM VoIP gateway: 1 channel, 2 channels
GSM E1 Channel Bank (30 channels)
(Dual band 900/1800 MHz or Quad band 900/1800/1900 MHz)
Products
[edit]A VoIP phone has the following hardware components:
- Keypad&touchpadto enter phone number and text.
- Speaker & earphone and microphone.
- General purpose processor (GPP) to process application messages.
- Display hardware to feedback user input and show caller-id & messages.
- Avoice engineor a digital signal processor (DSP) to processRTP[specify]messages. Some IC manufacturers provides GPP and DSP in single chip.
- Ethernet orwirelessnetwork hardware to send and receive messages on data network.
- Power source might be a battery or DC source. Some VoIP phones receive electricity from Power over Ethernet.
- ADCandDACconverters: To convert voice to digital data and vice versa.
Other devices
There are severalWi-Fienabled mobile phones andPDAsthat come pre-loaded withSIPclients, or are capable of running IP telephony clients. Some VoIP phones also support PSTN phone lines directly.
Gateway devices
Analog telephony adapters are connected to the internet orLocal area networkusing anEthernetport and have sockets to connect one or morePSTNphones. Such devices are sent out to customers who sign up with various commercialVoIPproviders allowing them to continue using their existing PSTN based telephones.
Another type of gateway device acts as a simpleGSMbase station and regularmobile phonescan connect to this and make VoIP calls. While a license is required to run one of these in most countries these can be useful on ships or remote areas where a low-powered gateway transmitting on unused frequencies is likely to go unnoticed.
- Ethernet hub
- Voice over IP
- E1 GSM Channel Bank with VoIP
- GSM Fixed Phone (FWP)
- IP Phone / Wifi IP
- Skype Phone Desktop
- Router
- 3G Wifi AP Router
- Gateway
- 3G GSM Gateway
- GSM Gateway
- PoE Switch
- Server
- 3G Hsupa Hsdpa EvdoEdge Modem
- GSM Remote SIM Switch / Server
- Wifi ATA / VoIP Gateway
- Terminal
- 3G VoIP Terminal
- CDMA VoIP Terminal
- GSM VoIP Terminal
- Modem
- GSM / Wifi Dual Mode
- Payphone
Disadvantages ofVoIPphones
IP networks, particularly residential Internet connections, are easily congested. This can cause poorer voice quality or the call to be dropped completely. VoIP phones, like other network devices can be subjected todenial-of-service attacksas well as other attacks, especially if the device is given a public IP address. Due to the latency induced by protocol overhead they do not work as well on satellite Internet and other high-latency Internet connections. Requires Internet access to make calls outside the local area network (LAN) unless a compatible localPBXis available to handle calls to and from outside lines. VoIP phones and routers depend on mains electricity for power, unlike PSTN phones, which are supplied with power from the telephone exchange. However, this can be mitigated by installing aUPS.
See also
[edit]- 3G(3rd-generation)
- Business telephone system(PBX)
- GSM(Global System for Mobile Communications)
- List of companies of Taiwan
- Network address translation(NAT)
- Network bridge
- Power over Ethernet(PoE)
- Session Initiation Protocol(SIP)
- Skype
- Voice over IP(Voice over Internet Protocol)
- Wi-Fi
- Wireless access point(WAP)
References
[edit]- Công ty đăng ký tư liệu tuần tra ( kinh tế bộ thương nghiệp tư )
- GSM operators to face Lottery Commission's anger
- Avaya CEO Predicts Broad Adoption Of SIP-Powered UC
- Virtual PBX Offers IP Solution