Internet Phone Call SMS And Viop
اتصل عبر الانترنت , الاتصال إلي تلفون ثابت , محمول , موبايل
Phone
system network call telephone internet
voip Gateway INFORMATION
VOIP Internet Telephony About VOIP Processes VOIP Phone System
Challenges in VOIP Residential VOIP
Voice over Internet Protocol (VoIP, IPA) is a general term for a family
of transmission technologies for delivery of voice
communications over the Internet or other packet-switched networks.
Other terms frequently encountered and
synonymous with VoIP are IP telephony and Internet telephony, as well as
voice over broadband, broadband telephony,
and broadband phone, when the network connectivity is available over
broadband Internet access.
VoIP systems usually interface with the traditional public switched
telephone network (PSTN) to allow for transparent
phone communications worldwide[1].
VoIP can be a benefit for reducing communication and infrastructure
costs by routing phone calls over existing data
networks and avoiding duplicate network systems. Skype and Vonage are
notable service provider examples that have
achieved widespread user and customer acceptance and market penetration.
Other providers are also available. See List
of commercial voice over IP network providers.
Voice-over-IP systems carry telephony speech as digital audio, typically
reduced in data rate using speech data
compression techniques, packetized in small units of typically tens of
milliseconds of speech, and encapsulated in a
packet stream over IP.
Can I call using the internet connection?
After its introduction, Internet telephony has been highly developed
rapidly in a brief period. Many software developers
currently offer PC telephony software. However, more importantly,
gateway servers are rising to act as an interface
between the Internet and the PSTN (It expands as Public Switched
Telephone Network). With voice-processing cards,
these gateway servers allow Internet telephony VoIP(It expands as Voice
Over Internet protocol) users to communicate
through traditional telephones over long distances without exceeding
"Long Distance" telephone network.
A telephone call travels from the local PSTN to the nearest gateway
server, which digitizes the traditional, analog voice
signal, converts it into IP packets, and moves it to the Internet for
transport to a gateway server at the receiving end.
This server alters the digital IP signal back to analog and concludes
the call locally. With its Internet telephony support
for computer-to-telephone calls, telephone-to-computer calls and
telephone-to-telephone calls, Internet telephony VoIP
represents a vital step toward the merging of voice and data networks.
The History and Advances made in Internet Technology
Voice ove r Internet Protocol (VoIP) is becoming a substitute to
traditional telephone service. The goal of VoIP
Deployment is to receive the registered location information of a VoIP
user to the most suitable public safety answering
point (PSAP) through statewide standards using the 9-1-1 network.
SIP Did for VoIP
The TAM100-VoIP, T1/E1 VoIP Network/Gateway Analyzer provides VoIP
network users and service providers a low cost tool to test, verify and
maintain VoIP networks at the WAN interface point for gateways,
IP-PBX/switches and medium capacity legacy network terminals.
Our popular VoIP Tracer Pack combined with the SAFIRE Professional
development environment; the perfect combination for developing
signaling applications, then validating & observing the application
signaling together with Internet & VoIP signaling!
* SAFIRE Professional
* Internet Protocol Analyzer
* VoIP Protocol Analyzer
IP DID Delivers Nationwide Numbers Anywhere in the World
IPDID local number service provides a flexible and cost-effective
solution for calling card companies, voice messaging / fax service
providers, and businesses that require local phone numbers in several
calling areas. IPDID local number service also provides a solution for
bulk phone numbers in a specific calling area. With over 1,000 rate
centers in 43 markets to choose from, IPDID service delivers these
features:
DIDX (DIDXChange) is the wholesale solution for buying and selling DID
numbers.
Who is it for ?
ITSP (Internet Telephony Service Providers), CLEC, ILEC, VOIP Service
Providers, Calling Card Operators, etc.
DIDX allows ITSP's to be a DIDX Seller and provide numbers from
different parts of the world, from their own web sites. DIDX pays when
the DID Seller after the DID Buyer buys.
DIDX also provides free of charge billing service to sell DID numbers
via the DIDx network to any other ITSP anywhere in the world using SIP
or IAX2 protocol.
Once they are sold, the DID's are instantly routed to the customer's SIP
address.
Special Offers!...
Interested in a VoIP (SIP/RTP) complete solution (hardware included)?
Then try this feature-rich product bundle!
* SIP Signaling Tester
* VoIP Protocol Analyzer
* SIP Traffic Generator
* SIP Call Analyzer
* RTP Traffic Quality Analyzer
* SAFIRE Professional
* Smart; 'cube' platform
Short Message Service (SMS)
Short Message Service (SMS) is a communication service standardized in the GSM mobile communication system, using standardized communications protocols allowing the interchange of short text messages between mobile telephone devices. SMS text messaging is the most widely used data application on the planet, with 2.4 billion active users, or 74% of all mobile phone subscribers sending and receiving text messages on their phones.[citation needed] The SMS technology has facilitated the development and growth of text messaging. The connection between the phenomenon of text messaging and the underlying technology is so great that in parts of the world the term "SMS" is used as a synonym for a text message or the act of sending a text message, even when a different protocol is being used.
SMS as used on modern handsets was originally defined as part of the GSM series of standards in 1985 as a means of sending messages of up to 160 characters (including spaces), to and from GSM mobile handsets. Since then, support for the service has expanded to include alternative mobile standards such as ANSI CDMA networks and Digital AMPS, as well as satellite and landline networks.[citation needed] Most SMS messages are mobile-to-mobile text messages, though the standard supports other types of broadcast messaging as well.
Multimedia Messaging Service (MMS)
Multimedia Messaging Service (MMS) is a new standard in mobile messaging. Like SMS (Short Messaging Service), MMS is a way to send a message from one mobile to another. The difference is that MMS can include not just text, but also sound, images and video. It is also possible to send MMS messages from a mobile phone to an email address.
Formats that can be embedded within MMS include:
-
Text (formatted with fonts, colours, etc)
-
Images (JPEG, GIF format)
-
Audio (MP3, MIDI)
-
Video (MPEG)
Images could be downloaded from WAP sites, selected from a menu within the phone, or could even be photos taken using a built-in camera if the phone has one (e.g. the Nokia 7650, Sony Ericsson T300, etc).
MMS is an extension of the SMS protocol, making its usage familiar to existing SMS users. An MMS message is a single entity, not a collection of attachments. One of the main practical differences between MMS and SMS is that whilst SMS messages are limited to 160 bytes, an MMS message has no size limit and could be many Kbytes in size, or even larger. MMS requires a third generation (3G) network to enable such large messages to be delivered, although smaller messages can be sent even with second generation networks using GPRS.
Whilst mobile phone users can create and send their own MMS messages, perhaps the biggest use of MMS is likely to be companies sending MMS messages to subscribers, enquirers or customers. For example, a company could send visitors an MMS map to help them find their office. Other possible applications include weather reports, news & sport bulletins, etc.
The first MMS capable phones started to appear in 2002, and the standard looks set to become very widely used in the years ahead. Different manufacturers are introducing MMS technologies in different ways. For example, Nokia are introducing MMS directly into their latest phones, whilst Sony Ericsson is introducing phones that have EMS (Enhanced messaging Service). EMS is a halfway house between SMS and MMS, providing some of the features of MMS (e.g. formatted text, simple pictures, simple audio such as ringtones, and even some animation). EMS is a technology that is designed to work with existing networks, but will ultimately be made obsolete by MMS.
Freephone around the world
Countries around the world use different area codes to denote toll-free
services in their own networks. Some examples are:
* In Australia, see section above.
* In Argentina, the prefix for toll-free numbers is "0800", followed by
seven digits (the first three of them is the same one repeated three
times). These numbers are called "0-800" (cero ochocientos) or "líneas
gratuitas" (free lines).
* In Austria, the prefix for toll-free numbers is also "0800", but only
followed by six digits. They are commonly referred to as
"Null-achthunderter Nummern" (Zero-eighthundred numbers).
* In Belgium, the prefix "0800" is used for toll-free numbers, followed
by 5 digits.
* In Brazil, the prefix is "0800" - although phone numbers are 8 digits
- it is followed by 7 digits - 6 digits are being phased out. Toll-free
numbers in Brazil can be accessed from any telephone (by default) in
Brazil, with many exceptions. They can be accessed from outside Brazil
only with a calling service (such as Vonage internet phone or MCI
Worldcom calling service) that access numbers from within the called
country. Many toll-free numbers are not available from cell phones
(usually blocked by the cell phone provider rather than the provider of
the toll-free number in an effort to prevent low-price competition from
calling card providers). Some toll-free numbers are not available from
phones listed by the owner of the number, including many payphones. For
example, the MCI Worldphone calling service blocks usage from the pay
phones in international airports (Rio and São Paulo) and many downtown
pay phones due to "excessive fraud" from those phones (July 2003). In
addition, Brazil has a system of regular and international pay phones
(designated with the symbol "DDD"). Toll-free numbers to international
calling plans can be reliably used from non-DDD pay phones, as of 2005.
* In Bulgaria, the toll-free prefix is "0800" followed by a five-digit
number (up to now, only 1XXXX and 20ххх numbers have been allocated).
These numbers are called "Зелен номер" (Green Number) by BTC and "Зелена
линия" (Green Line) by M-tel.
* In Chile, the toll-free prefix is "800" followed by a six-digit
number. These numbers are called "número 800" (800 number). These
numbers can not be accessed from abroad.
* In China, the prefix is "800" for toll-free numbers and often referred
to as "免付費电话". China Netcom (CNC) callers in North China dial
10-800-712-xxxx, China Telecom (CT) callers in in South China dial
10-800-120-xxx. China toll-free numbers are not accessible via mobile
phones.[4]
* In Colombia, toll-free numbers start with 018000
* In Croatia, the prefix for toll-free numbers is "0800"
* In Czech Republic, the toll-free prefix is "800".
* In Denmark telephone-numbers have eight digits. The toll-free numbers
all begin with "80" followed by six further digits.
* In Dominican Republic, it's 1-200-xxxx (in addition to the area code).
* In Egypt, it starts with (800) followed by the number.
* In Ecuador, it starts with 1800 followed by 6-digit number. Some
numbers have either regional or nationwide access. Calls from cellphones
are only allowed by the operator Alegro which charges a few cents for
these calls. PORTA and movistar does not allow the service.
* In the European Union, there is a freephone number, working only
inside the Union, called "Europa Direct", that provides information
about Europe. The number is "00 800 6 7 8 9 10 11" (+800 can be used
from cellular phones). This is an ITU UIFN, i.e. +800 6789 1011.
* In France the "0800" prefix is used for toll-free numbers. They are
also known as numéros verts (green numbers).
* In Finland, the toll-free prefix is "0800".
* In Germany, the toll-free prefix is "0800" followed by a seven-digit
number. The "0801" prefix is already reserved for future use. The prefix
was formerly "0130". Deutsche Telekom calls these numbers "freecall
0800", most Germans refer to it simply as Servicerufnummer (service
number)[citation needed].
* In Greece, the toll-free prefix is "800" followed by a seven-digit
number or "807" followed by a four-digit number, used for phonecard
services only.
* In Hong Kong, toll-free numbers have "800" prefix[citation needed].
* In Hungary, toll-free numbers have "80" prefix.
* In Iceland, the toll-free prefix is "800" followed by a four-digit
number.
* In India, toll-free numbers used to begin with "1600" now the same
numbers should be called using "1800".
* In Indonesia, the toll-free prefix is "0 800" followed by a
seven-digit number.
* In Ireland, 1800-xxxxxx numbers are freephone, with the 1800 71xxxx
reserved for services that expect unusually high volumes of calls e.g.
radio station phone-in lines. [5]
* In Israel, toll-free numbers are prefixed with "1800" followed by 6
digits.
* In Italy, toll-free numbers are dialed with the "800" or "803" prefix
and are commonly referred to as "Numero Verde" (green number) or "Linea
Verde" (green line). The "Numeri Verdi" used to begin with "1678" and
later with "167".
* In Japan, the prefix "0120," "0800," "0077" are used for toll-free
numbers and are often referred to as "free dial" (フリーダイヤル) or "free
call" (フリーコール).
* In South Korea, toll-free numbers are prefixed with "080" (not to be
confused with "060" or "070", which are used for
pay-per-call/pay-per-minute information services or small amount
payment-by-home-phone services). It is to be noted that not all numbers
with the "080" prefix are toll-free when called from a mobile phone.
* In Malaysia the prefix is 1800-xxxxxx. Free if calling from land-line
only. Calling from mobile phone network will considered as local call,
charges varies from mobile network providers.
* In Mexico the prefix is 01-800.
* In New Zealand, both "0800" or "0508" prefixes are referred to
variously and interchangeably as "free phone" or "toll-free". Originally
these "Oh-eight-hundred" numbers were provided by Telecom NZ and "0508"
by rival company Clear (now TelstraClear), although now both numbers can
be provided by either company. Some older toll bar services designed to
restrict toll calls (including long distance or calls to mobile phones)
will also block calls to these free phone numbers, although this has
become less common since the mid 1990s. A limited number of companies
utilizing toll-free numbers will not accept calls from mobile phones.
Some other free phone services exist, such as "*555" ("star five five
five"), which can be dialled from cellular phones to report traffic
conditions and incidents of dangerous driving.
* In the Netherlands, the prefix "0800" is used for toll-free numbers.
Calling 0800 numbers from a mobile phone is generally airtime-free.
* In Norway most telephone-numbers have eight digits (some exceptions).
The toll-free numbers all begin with "800" followed by five further
digits.
* In Pakistan,toll-free numbers have the following format "0800-xxxxx".
* In the Philippines, the prefix for toll-free numbers is "1800"
followed by either one, two, or four digits (examples include 8, 10, and
1888) followed by either a four- or seven-digit phone number.
* In Poland, toll-free numbers have the following format "0800 xxx xxx".
* In Portugal, the prefix is "800" so the 9-digit number is "800 xxx
xxx". It is referred as "Chamada Gratuita" (Free Call) or as "Número
Verde" (Green Number).
* In Romania, the prefix is 08008 is used for toll-free numbers. The
service is referred to as "Telverde".
* In Russia, the prefix is "8" "800", so call is 8-800-XXX-XXXX (from
2008-2010 "0-800-XXX-XXXX").
* In Serbia, the prefix "800" followed by a 6 or 7 digit number is used
* In Singapore, the prefix "1800" followed by a 7 digit number is used.
* In Slovakia, the toll-free prefix is "0800", followed by six digits.
* In Slovenia, the prefix "080" is used for toll-free numbers, followed
by four more digits.
* In South Africa, the prefix "0800", followed by 7 digits is used. It
is referred to as a "toll-free" or "0800" number (Afrikaans: tol-vrye).
* In Spain, the "900XXXXXX" or "800XXXXXX" numbers are always toll-free
(800 numbers are not usually used), "909XXXXXX" is used for dial-up
Internet service and toll-free dialup Internet service (under
subscription). Also "1002", "1004", "14XX", "15XX" and "16XX" are free
and are used for the telecommunication providers call centers.
* In Sweden, the prefix is "020" or "0200" for toll-free numbers.
(Additionally, 0800 is reserved for future use.)
* In Switzerland, the toll-free prefix is 0800; previously it was 155.
These numbers are called « grüne Nummer / numéro vert / numero verde »
(green number).
* In Taiwan, the toll-free prefix is 0800 or 0809.
* In Thailand, Call Free, Free Call, Toll Free, or Free Phone,the prefix
used is "1800"xxxxxx. Calls are free for all fixed line calls. Mobile
carriers AIS, CAT and True offer Call Free service for cell phones. At
present DTAC does not, however it is expected to offer the toll free
service for subscribers by mid 2008.
* In Turkey, the prefix for toll-free numbers is "0800".
* In Ukraine, toll-free numbers have "8" "800" prefix.
* In the UK, numbers starting "0500", "0800" or "0808" are free, with
"0800" the most commonly encountered. Additionally, numbers in the range
0808 80xxxxx are reserved for not-for-profit helplines. Since Orange UK
introduced charges for dialing freephone numbers in December 2005, all
British mobile networks now charge for calls to freephone numbers, with
certain limited exemptions (notably Childline). Freephone numbers can be
obtained from various telecom companies from £15 per month or for free
with calls charged from 2 pence per minute.[6] Toll free calls are also
still available via the operator, although largely superseded by the
0800 system - a commonly seen phrase in advertisements was "Dial 100 and
ask for freephone <business name>".
* In the USA and Canada, see section above.
* In Vietnam, the prefix "1800" followed by a series of numbers, usually
from 4 to 9 digits. All "1800" numbers are free of charge, but some of
them cannot be dialed from all telephones.
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