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As CLASS was an AT&T trademark, the term vertical service code was adopted by the North American Numbering Plan Administration. The use of vertical is a somewhat dated reference to older switching methods and the fact that these services can only be accessed by a telephone subscriber, going up ( vertically ) inside the local central office ...
To activate Remote Access to Call Forwarding, a subscriber calls a provider-supplied Remote Access Directory Number, enters the telephone number of the line to be redirected along with a personal identification number (PIN), a vertical service code (such as 72# or *73) and the number to which the calls are to be forwarded.
Then establish the connection as usual by dialing 1, the area code, and the phone number to complete the call. Anonymous Call Rejection (*77) is offered to subscribers, so in some situations it is necessary to dial *82 in order to ring through and complete the call to those lines that subscribe to and enable anonymous call rejection.
Call forwarding, or call diversion, is a telephony feature of all telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile or another telephone number where the desired called party is available. Call forwarding was invented by Ernest J. Bonanno.
ETSI and 3rd Generation Partnership Project (3GPP) standards, such as GSM and LTE, define supplementary service codes that make it possible to query and set certain service parameters (e.g., call forwarding) directly from mobile devices.
Spam calls flood in from across the globe, but my Ooma land line often reports the source as Bonner Springs, Lee’s Summit, Topeka, Wichita, Great Bend, North Kansas City, Le Cygne.
In AT&T's third-quarter earnings report, the company announced it will invest $14 billion in wireless and wireline IP broadband networks, where, including managed IT services, the company expects ...
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