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USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network. [1] The service does not require a messaging app, and does not incur charges. [2] USSD messages are up to 182 alphanumeric characters long.
The request has been rejected because it was anonymous. [17] 436 Bad Identity-Info The request has an Identity-Info header, and the URI scheme in that header cannot be dereferenced. [14]: p11 437 Unsupported Certificate The server was unable to validate a certificate for the domain that signed the request. [14]: p11 438 Invalid Identity Header
Other countries have sought to use technical means to prevent callback, by blocking the inbound and outbound calls made to and from DID numbers, or by disabling touch tone dialing. However, this is also overcome by the use of speed dial numbers, while others use these services by triggering callback via the Internet or SMS.
Japan: 1361 to get number, 1363 to call back. [4] United Kingdom: 1471 (also used in Gibraltar, Ireland, Isle of Man, Channel Islands, and the Falkland Islands) In the UK, after dialing 1471, the caller can press "3" to automatically return the call. Previously free, since August 2004 the return call service incurs a charge.
In telecommunications, an automatic callback is a computer telephony calling feature that permits a user, when encountering a busy condition or other condition where the called individual is unavailable, to instruct the system to retain the called number and to establish the call when there is an available line or when the called number is no longer busy.
A typical Web callback form. Web callback is a technology where a person can enter his or her telephone number in a form on a web site. The company who owns that Web site will then receive the Web callback request and a call center agent will call the person who made the request back on the number they entered.
Telkom (formerly known as 8.ta from 18 October 2010 till 19 March 2013 and as Telkom Mobile From 19 March 2013 till 2014), [1] [2] [3] is a South African mobile telecommunications company. Telkom was launched in October 2010 and is owned by Telkom SOC. Telkom phone numbers use the 0811 to 0819 dialling prefixes. [4]
Telkom SA SOC Limited is a South African wireline and wireless telecommunications provider, operating in more than 38 countries across the African continent.Telkom is majority state-owned (55.3%) with the South African government owning 40.5% of Telkom, while another 14.8% is owned by another state-owned company - the Public Investment Corporation (PIC), which is closely linked to the South ...