SunComm Technology
Encyclopedia
SunComm Technology is a Taiwan
multinational computer technology and GSM Voice over IP
gateway
manufacturer. The main products in 2010 focused on GSM VoIP gateways & IP
surveillance camera devices. Core members have been engaging in the communication & networks industry since 1977.
In 1977, developed communication & networks industry.
In 2007, developed GSM gateway.
In 2008, developed VoIP.
In 2010, developed GSM to VoIP Gateway.
, China
Liaison Office has
been set up at Guan-Dong Province to provide service from Taiwan
and China.
SunComm Technology Co., Ltd provides:
Wifi IP Phone
gateway
2, 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 Gateway (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)
Other devices
There are several Wi-Fi
enabled mobile phones and PDA
s that come pre-loaded with SIP
clients, 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 or Local area network
using an Ethernet
port and have sockets to connect one or more PSTN
phones. Such devices are sent out to customers who sign up with various commercial VoIP providers allowing them to continue using their existing PSTN based telephones.
Another type of gateway device acts as a simple GSM base station and regular mobile phone
s can 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.
Disadvantages of VoIP phones
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 to denial-of-service attack
s as 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 local PBX is 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 a UPS
.
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...
multinational computer technology and GSM Voice over IP
Voice over IP
Voice over Internet Protocol is a family of technologies, methodologies, communication protocols, and transmission techniques for the delivery of voice communications and multimedia sessions over Internet Protocol networks, such as the Internet...
gateway
Gateway (telecommunications)
In telecommunications, the term gateway has the following meaning:*In a communications network, a network node equipped for interfacing with another network that uses different protocols....
manufacturer. The main products in 2010 focused on GSM VoIP gateways & IP
Internet Protocol
The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...
surveillance camera devices. Core members have been engaging in the communication & networks industry since 1977.
History
SunComm Technology Co., LtdIn 1977, developed communication & networks industry.
In 2007, developed GSM gateway.
In 2008, developed VoIP.
In 2010, developed GSM to VoIP Gateway.
Operations
DongguanDongguan
Dongguan is a prefecture-level city in central Guangdong province, People's Republic of China.An important industrial city located in the Pearl River Delta, Dongguan borders the provincial capital of Guangzhou to the north, Huizhou to the northeast, Shenzhen to the south, and the Pearl River to...
, China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
Liaison Office has
been set up at Guan-Dong Province to provide service from Taiwan
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...
and China.
SunComm Technology Co., Ltd provides:
- VoIP
Wifi IP Phone
gateway
Gateway (telecommunications)
In telecommunications, the term gateway has the following meaning:*In a communications network, a network node equipped for interfacing with another network that uses different protocols....
2, 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
GSM Gateway (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
A VoIP phone has the following hardware components:- KeypadKeypadA keypad is a set of buttons arranged in a block or "pad" which usually bear digits, symbols and usually a complete set of alphabetical letters. If it mostly contains numbers then it can also be called a numeric keypad...
& touchpadTouchpadA touchpad is a pointing device featuring a tactile sensor, a specialized surface that can translate the motion and position of a user's fingers to a relative position on screen. Touch pads are a common feature of laptop computers, and they are also used as a substitute for a mouse where desk...
to 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.
- A voice engineVoice engineA voice engine is a software subsystem for bidirectional audio communication, typically used as part of a telecommunications system to simulate a telephone. It functions like a data pump for audio data, specifically voice data...
or a digital signal processor (DSP) to process RTPReal-time Transport ProtocolThe Real-time Transport Protocol defines a standardized packet format for delivering audio and video over IP networks. RTP is used extensively in communication and entertainment systems that involve streaming media, such as telephony, video teleconference applications, television services and...
messages. Some IC manufacturers provides GPP and DSP in single chip. - Ethernet or wirelessWirelessWireless telecommunications is the transfer of information between two or more points that are not physically connected. Distances can be short, such as a few meters for television remote control, or as far as thousands or even millions of kilometers for deep-space radio communications...
network 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.
- ADCAnalog-to-digital converterAn analog-to-digital converter is a device that converts a continuous quantity to a discrete time digital representation. An ADC may also provide an isolated measurement...
and DACDigital-to-analog converterIn electronics, a digital-to-analog converter is a device that converts a digital code to an analog signal . An analog-to-digital converter performs the reverse operation...
converters: To convert voice to digital data and vice versa.
Other devices
There are several Wi-Fi
Wi-Fi
Wi-Fi or Wifi, is a mechanism for wirelessly connecting electronic devices. A device enabled with Wi-Fi, such as a personal computer, video game console, smartphone, or digital audio player, can connect to the Internet via a wireless network access point. An access point has a range of about 20...
enabled mobile phones and PDA
PDA
A PDA is most commonly a Personal digital assistant, also known as a Personal data assistant, a mobile electronic device.PDA may also refer to:In science, medicine and technology:...
s that come pre-loaded with SIP
Session Initiation Protocol
The Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...
clients, 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 or Local area network
Local area network
A local area network is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building...
using an Ethernet
Ethernet
Ethernet is a family of computer networking technologies for local area networks commercially introduced in 1980. Standardized in IEEE 802.3, Ethernet has largely replaced competing wired LAN technologies....
port and have sockets to connect one or more PSTN
Public switched telephone network
The public switched telephone network is the network of the world's public circuit-switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by...
phones. Such devices are sent out to customers who sign up with various commercial VoIP providers allowing them to continue using their existing PSTN based telephones.
Another type of gateway device acts as a simple GSM base station and regular mobile phone
Mobile phone
A mobile phone is a device which can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile network operator...
s can 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 hubEthernet hubAn Ethernet hub, active hub, network hub, repeater hub or hub is a device for connecting multiple Ethernet devices together and making them act as a single network segment. A hub works at the physical layer of the OSI model. The device is a form of multiport repeater...
- Voice over IPVoice over IPVoice over Internet Protocol is a family of technologies, methodologies, communication protocols, and transmission techniques for the delivery of voice communications and multimedia sessions over Internet Protocol networks, such as the Internet...
- E1 GSM Channel Bank with VoIP
- GSM Fixed Phone (FWP)
- IP Phone / Wifi IP
- Skype Phone Desktop
- Router
- 3G Wifi AP Router
- GatewayGateway (telecommunications)In telecommunications, the term gateway has the following meaning:*In a communications network, a network node equipped for interfacing with another network that uses different protocols....
-
- 3G GSM Gateway
- GSM Gateway
- PoE Switch
- ServerServer (computing)In the context of client-server architecture, a server is a computer program running to serve the requests of other programs, the "clients". Thus, the "server" performs some computational task on behalf of "clients"...
- 3G Hsupa Hsdpa EvdoEdge Modem
- GSM Remote SIM Switch / Server
- Wifi ATA / VoIP Gateway
- Terminal
- 3G VoIP Terminal
- CDMA VoIP Terminal
- GSM VoIP Terminal
- ModemModemA modem is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data...
- GSM / Wifi Dual Mode
- PayphonePayphoneA payphone or pay phone is a public telephone, often located in a phone booth or a privacy hood, with pre-payment by inserting money , a credit or debit card, or a telephone card....
Disadvantages of VoIP phones
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 to denial-of-service attack
Denial-of-service attack
A denial-of-service attack or distributed denial-of-service attack is an attempt to make a computer resource unavailable to its intended users...
s as 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 local PBX is 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 a UPS
Uninterruptible power supply
An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails...
.
See also
- List of companies of Taiwan
- Network address translationNetwork address translationIn computer networking, network address translation is the process of modifying IP address information in IP packet headers while in transit across a traffic routing device....
(NAT) - Wireless access pointWireless access pointIn computer networking, a wireless access point is a device that allows wireless devices to connect to a wired network using Wi-Fi, Bluetooth or related standards...
(WAP) - Bridging (networking)Bridging (networking)Bridging is a forwarding technique used in packet-switched computer networks. Unlike routing, bridging makes no assumptions about where in a network a particular address is located. Instead, it depends on flooding and examination of source addresses in received packet headers to locate unknown...
- SkypeSkypeSkype is a software application that allows users to make voice and video calls and chat over the Internet. Calls to other users within the Skype service are free, while calls to both traditional landline telephones and mobile phones can be made for a fee using a debit-based user account system...
- 3G3G3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 specifications by the International Telecommunication Union...
(3rd-generation) - Power over EthernetPower over EthernetPower over Ethernet or PoE technology describes a system to pass electrical power safely, along with data, on Ethernet cabling. The IEEE standard for PoE requires category 5 cable or higher for high power levels, but can operate with category 3 cable for low power levels...
(PoE) - Business telephone system (PBX)
- Session Initiation ProtocolSession Initiation ProtocolThe Session Initiation Protocol is an IETF-defined signaling protocol widely used for controlling communication sessions such as voice and video calls over Internet Protocol . The protocol can be used for creating, modifying and terminating two-party or multiparty sessions...
(SIP) - GSM (Global System for Mobile Communications)
- Voice over IPVoice over IPVoice over Internet Protocol is a family of technologies, methodologies, communication protocols, and transmission techniques for the delivery of voice communications and multimedia sessions over Internet Protocol networks, such as the Internet...
(Voice over Internet Protocol) - Wi-FiWi-FiWi-Fi or Wifi, is a mechanism for wirelessly connecting electronic devices. A device enabled with Wi-Fi, such as a personal computer, video game console, smartphone, or digital audio player, can connect to the Internet via a wireless network access point. An access point has a range of about 20...
(Wireless Fidelity)