websters new world telecom dictionary phần 8 potx
websters new world telecom dictionary phần 8 potx
... over 1–4 four-wire
(i.e., 4 two-pair) circuits, which results in a savings of at least 88 pairs (96 – 8 = 88 ) from the CO to the
node. Note: For fewer than 4 T1s, not all subscriber lines can be ... Texas)
Pacific Bell (California)
Nevada Bell (Nevada)
New England Telephone (Massachusetts,
Maine, New Hampshire, Rhode Island,
and Vermont)
New York Telephone (New York)
Bell Operatin...
websters new world Telecom Dictionary phần 1 potx
... Fibre Channel, GigE, ones density, and
line coding.
8- level vestigial sideband (8- VSB) See 8- VSB.
8- Phase Shift Keying (8- PSK) See 8- PSK.
8- PSK (8- Phase Shift Keying) A signal modulation technique ... was
80 0.As the service gained in popularity during the 1990s,the numbering scheme was expanded to include
86 6, 87 7, and 88 8 area codes. See also area code and toll free serv...
websters new world telecom dictionary phần 2 potx
... EIA/TIA-5 68, ICEA, IEC, ISO, ISO/IEC 1 180 1, TIA, and
twist pitch.
Carterfone Decision 84
74570c03.qxd 9/11/07 12:19 PM Page 84
Figure A-7
AT&T (American Telephone and Telegraph) On July 9, 187 7, ... and z-axis.
Carty, John Joseph ( 186 1–1932) As a young American Bell technician and one of the original tele-
phone operators ( 187 9), Mr. Carty suggested in 188 1 the use of a secon...
websters new world telecom dictionary phần 3 pdf
... 1.544
30 2.0 48
1C 48 3.152
2 96 6.312 6.312
120 8. 4 48 7. 786
3 480 34.3 68 32.064
672 44.736
3C 1,344 91.053
4 1,440 97.7 28
1,920 139.2 68
4,032 274.176
5 5,760 400.352
7, 680 565.1 48 565.1 48
6 30,720 ... over
a much wider band. DSSS is used in the 80 2.11b (Wi-Fi) and 80 2.11g specifications for wireless local area
networks (WLANs). See also 80 2.11b, 80 2.11g, band, carr...
websters new world telecom dictionary phần 4 pps
... E-1s
E-1 2.0 48 30 1
E-2 8. 4 48 120 4
E-3 34.3 68 480 16
E-4 139.2 68 1920 64
E-5 565.1 48 7 680 256
EBCDIC (Extended Binary Coded Decimal Interchange Code) 1 58
74570c05.qxd 9/11/07 12:20 PM Page 1 58
f1.Symbol ... functional and practical
electric telegraph ( 184 4), invented by Samuel F.B. Morse (1791– 187 2) and Alfred Vail ( 180 7– 185 9). Fax
development began anew in the 1920s...
websters new world telecom dictionary phần 5 ppt
... transport
subsystem as ISO/IEC 1 381 8. Packet transport involves a serial data stream of packets of 188 octets, one
octet of which is a synchronization byte and 187 octets of which are payload.This ... slots, each of which is 8 bits wide.At a rate of 8, 000 fps, each time slot is repeated 8, 000 times
per second, which translates into a DS-O channel at 64 kbps (8 bits × 8, 000 per seco...
websters new world telecom dictionary phần 6 pptx
... network, as illustrated in Figure M-1, requires 28 circuits, each of which requires two ports,
calculated as follows:
X = n(n – 1) / 2
28 = 8( 8 – 1) / 2
The cost and complexity of full mesh networks ... Standard (IS 1 381 8) for digital television (DTV). MPEG-2 was
conceived as an encoding and compression standard for broadcast television based on interlaced scanning of
images at 720 × 4...
websters new world telecom dictionary phần 7 doc
... Rate OC/STM Level Line Rate
OTU-1 2.666 Gbps OC- 48/ STM-16 2. 488 Gbps
OTU-2 10.709 Gbps OC-192/STM-64 9.953 Gbps
OTU-3 43.0 18 Gbps OC-7 68/ STM-256 39 .81 3 Gbps
G.709 also specifies an interface for ... engineering.
Poisson, Siméon-Denis (1 781 – 184 0) The French mathematician and physicist who discovered the
Poisson distribution, which he published together with his probability theory...
websters new world telecom dictionary phần 9 doc
... rate of 8, 000 fps, each time slot is repeated
8, 000 times per second, which translates into a DS-O channel at 64 kbps (8 bits × 8, 000 per second =
64,000 bps).Taken together, the 24 8- bit TDM ... operator must listen to decode the transmission. Note: In 183 8, Samuel Morse offered to give
his invention of the telegraph to the newly formed ( 183 6) Republic of Texas. After having rece...
websters new world telecom dictionary phần 10 pdf
... 202.775.3550
www.ncta.com
NECA
National Exchange Carrier Association
80 South Jefferson Road
Whippany, NJ 07 981 -1009
Tel: 973 .88 4 .80 00, or 80 0.2 28. 8597
Fax: 973 .88 4 .84 69
www.neca.org
NTIS
National Technical Information ... NARTE
National Association of Radio and
Telecommunications Engineers
167 Village Street
Medway, MA 02053
Tel: 5 08. 533 .83 33 or 80 0 .89 6.2 783
Fax: 5...
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