- published: 26 Nov 2019
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A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.
A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features related to call handling. Business telephone systems are often broadly classified into key telephone systems, and private branch exchanges, but many hybrid systems exist.
A key telephone system was originally distinguished from a private branch exchange (PBX) in that it did not require an operator or attendant at the switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with central office telephone systems, and in larger or more complex systems, may rival a central office system in capacity and features. With a key telephone system, a station user could control the connections directly using line buttons, which indicated the status of lines with built-in lamps.
Call forwarding, or call diversion, is a telephony feature of some telephone switching systems which redirects a telephone call to another destination, which may be, for example, a mobile telephone, voicemail box or another telephone number where the desired called party is available. Call forwarding was invented by Ernest J. Bonanno. In North America, the forwarded line usually rings once to remind the customer using call forwarding that the call is being redirected. More consistently, the forwarded line indicates its condition by stutter dial tone. Call forwarding typically can redirect incoming calls to any other domestic telephone number, but the owner of the forwarded line must pay any toll charges for forwarded calls. Call forwarding is often enabled by dialing *72 followed by the telephone number to which calls should be forwarded. Once someone answers, call forwarding is in effect. If no one answers or the line is busy, the dialing sequence must be repeated to effect call forwarding. Call forwarding is disabled by dialing *73. This feature requires a subscription from the telephone company. Also available in some areas is Remote Access to call forwarding, which permit the control over call forwarding from telephones other than the subscriber's telephone. VOIP and cable telephone systems also often allow call forwarding to be set up and directed via their web portals.
Chaos and Creation in the Backyard is the thirteenth solo studio album by Paul McCartney, released in 2005. A long time in the making, the set was produced by Radiohead and Beck collaborator Nigel Godrich at George Martin's suggestion.
McCartney plays almost all of the instruments, similar to his 1970 album McCartney and the 1980 McCartney II album. In addition, Chaos and Creation in the Backyard marks the first time since 1984's Give My Regards to Broad Street that McCartney was not involved in producing one of his studio albums.
Chaos and Creation in the Backyard was McCartney's last rock album release for longtime label EMI. He signed a deal with Hear Music, owned by Starbucks, in March 2007.
McCartney said that the song "Friends to Go" is influenced by, and dedicated to George Harrison.
Upon being asked to produce an album with McCartney, Godrich admitted:
The two tentatively began a collaboration, recording the songs "This Never Happened Before" and "Follow Me" which was enough to convince both of them that they could develop an album. Godrich's participation was active: he inspired McCartney to write the song "At the Mercy", added piano loops on "How Kind of You" and worked with McCartney to slow the tempo of "Riding to Vanity Fair" which McCartney says "changed the mood completely". Although initially taken aback, McCartney appreciated Godrich's tenacity and honesty.
In mathematics, the unitary group of degree n, denoted U(n), is the group of n × n unitary matrices, with the group operation that of matrix multiplication. The unitary group is a subgroup of the general linear group GL(n, C). Hyperorthogonal group is an archaic name for the unitary group, especially over finite fields.
In the simple case n = 1, the group U(1) corresponds to the circle group, consisting of all complex numbers with absolute value 1 under multiplication. All the unitary groups contain copies of this group.
The unitary group U(n) is a real Lie group of dimension n2. The Lie algebra of U(n) consists of n × n skew-Hermitian matrices, with the Lie bracket given by the commutator.
The general unitary group (also called the group of unitary similitudes) consists of all matrices A such that A∗A is a nonzero multiple of the identity matrix, and is just the product of the unitary group with the group of all positive multiples of the identity matrix.
Since the determinant of a unitary matrix is a complex number with norm , the determinant gives a group homomorphism
The United Nations (UN) is an intergovernmental organization to promote international co-operation. A replacement for the ineffective League of Nations, the organization was established on 24 October 1945 after World War II in order to prevent another such conflict. At its founding, the UN had 51 member states; there are now 193. The headquarters of the United Nations is in Manhattan, New York City, and experiences extraterritoriality. Further main offices are situated in Geneva, Nairobi and Vienna. The organization is financed by assessed and voluntary contributions from its member states. Its objectives include maintaining international peace and security, promoting human rights, fostering social and economic development, protecting the environment, and providing humanitarian aid in cases of famine, natural disaster, and armed conflict.
During the Second World War, US President Franklin D. Roosevelt initiated talks on a successor agency to the League of Nations, and the United Nations Charter was drafted at a conference in April–June 1945; this charter took effect 24 October 1945, and the UN began operation. The UN's mission to preserve world peace was complicated in its early decades by the Cold War between the US and Soviet Union and their respective allies. The organization participated in major actions in Korea and the Congo, as well as approving the creation of the state of Israel in 1947. The organization's membership grew significantly following widespread decolonization in the 1960s, and by the 1970s its budget for economic and social development programmes far outstripped its spending on peacekeeping. After the end of the Cold War, the UN took on major military and peacekeeping missions across the world with varying degrees of success.
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Nox Vahn & Marsh feat. Mimi Page - Follow Me (Extended Mix) » Genre: Deep House Music / Melodic House & Techno » Label: Anjunadeep » Length: 08:10 » Released: 2019-06-24 Mister Mixmania is a promotion and support provider for artists from the fields of deep house, dance music, electronic, chill out, nu disco, indie dance and funky house music. ------------------------★---------------------- ENJOY THE SOUND OF MUSIC ------------------------★---------------------- Mister Mixmania is created to promote the already well-known as well as beginning their career talented artists, (musicians/labels, composers, producers, photographers/filmmakers) Send your song, video or pictures on Mister Mixmania: submission@mister-mixmania.com Thank You. We wish you a lot of fun with the tra...
A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges.
A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features related to call handling. Business telephone systems are often broadly classified into key telephone systems, and private branch exchanges, but many hybrid systems exist.
A key telephone system was originally distinguished from a private branch exchange (PBX) in that it did not require an operator or attendant at the switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with central office telephone systems, and in larger or more complex systems, may rival a central office system in capacity and features. With a key telephone system, a station user could control the connections directly using line buttons, which indicated the status of lines with built-in lamps.