websters new world telecom dictionary phần 5 ppt

... Class Hosts per Network A 1.0.0.1 to 126. 255 . 255 . 254 126 16,777,214 B 128.0.0.1 to 191. 255 . 255 . 254 16,384 65, 534 C 192.0.0.1 to 223. 255 . 255 . 254 2,097, 152 254 D Reserved for multicast purposes E ... J-carrier. J -5 The fifth level in the Japanese J-carrier digital hierarchy. J -5 runs at a signaling rate of 56 5.148 Mbps in support of 7,680 DS-0 channels which maps J -5 i...

Ngày tải lên: 14/08/2014, 09:20

... VCSEL, and wavelength. Figure M-3 Coating OD: 250 µ Cladding OD: 1 25 µ Core OD: 62 .5/ 50 µ 62 .5 µ 50 µ MMF (MultiMode Fiber) 314 7 457 0c13.qxd 9/11/07 12: 25 PM Page 314 MS-DOS (MicroSoft Disk Operating ... Block has a width of 1. 15 GHz in the frequency bands of 27 .5 28. 35 GHz, 29.1–29. 25 GHz, and 31.0–31. 15 GHz.The B Block has a width of 150 MHz in the spectrum between 31. 1...

Ngày tải lên: 14/08/2014, 09:20

... Rate Metric Gauge 1 .54 4 Mbps (T1) 2.048 Mbps (E-1) 24 18,000 ft. 0 .5 mm 5. 5 km 1 .54 4 Mbps (T1) 2.048 Mbps (E-1) 26 15, 000 ft. 0.4 mm 4.6 km 6.144 Mbps (4 x T1) 24 12,000 ft. 0 .5 mm 3.7 km 6.144 ... core diameter of either 50 µ or 62 .5 , using a wavelength of 850 nm.The modal bandwidth ranges from 160 MHz/km to 50 0 MHz/km, and maximum distance ranges from 220 meters to 55 0 met...

Ngày tải lên: 14/08/2014, 09:20

... and bypass the point of failure. See also LAN, node, and Token Ring. 55 beaconing 7 457 0c02.qxd 9/11/07 12:18 PM Page 55 7 457 0c02.qxd 9/11/07 12:18 PM Page 76 bill only for airtime, regardless ... bit Bridge < 50 0 m < 2 .5 km Terminator busy hour 74 7 457 0c02.qxd 9/11/07 12:18 PM Page 74 Figure C-1 Contemporary coax-based CATV systems commonly support aggregate raw bandwidth o...

Ngày tải lên: 14/08/2014, 09:20

... 1 .54 4 1 .54 4 30 2.048 1C 48 3. 152 2 96 6.312 6.312 120 8.448 7.786 3 480 34.368 32.064 672 44.736 3C 1,344 91. 053 4 1,440 97.728 1,920 139.268 4,032 274.176 5 5,760 400. 352 7,680 56 5.148 56 5.148 6 ... with each field given a value in decimal notation of 0– 255 , the range expressed by a single octet in binary notation (2 8 = 256 , or 0– 255 ).This format sometimes is referred...

Ngày tải lên: 14/08/2014, 09:20

... 4 E-3 34.368 480 16 E-4 139.268 1920 64 E -5 5 65. 148 7680 256 EBCDIC (Extended Binary Coded Decimal Interchange Code) 158 7 457 0c 05. qxd 9/11/07 12:20 PM Page 158 f1.Symbol for frequency. 2. femto. ... Commission) 198 7 457 0c06.qxd 9/11/07 12:21 PM Page 198 can be multimode fiber (MMF) of either 62 .5 (300 meters) or 50 µ (50 0 meters, maximum distance), or single-mode fiber (SMF) (...

Ngày tải lên: 14/08/2014, 09:20

... there is an abrupt change in the chemical com- OTU (Optical Transport Unit) 354 7 457 0c 15. qxd 9/11/07 12:26 PM Page 354 contemporary operator mans a PBX console or perhaps a complex traffic service ... network unit (ONU) See ONU. optical-optical-optical (OOO) See OOO. operator 350 7 457 0c 15. qxd 9/11/07 12:26 PM Page 350 over the air (OTA) 1. Referring to broadcast airwave radio and...

Ngày tải lên: 14/08/2014, 09:20

... AWG 75 ohms .332 in. Solid CATV, cable modems, DBS TV RG-8/U 10 AWG 50 ohms .4 05 in. Solid 10Base5 Ethernet, Ham radio RG -58 /U 20 AWG 53 .5 ohms .116 in. Solid 10Base2 Ethernet, Ham radio RG -58 C/U ... Ethernet, Ham radio RG -58 C/U 20 AWG 50 ohms 116 in. Solid RG -58 A/U Military Spec RG -58 A/U 20 AWG 50 ohms 116 in. Stranded 10Base2 Ethernet, CATV RG -59 /U 20 AWG 75 ohms 14...

Ngày tải lên: 14/08/2014, 09:20

... 2 3 22 23 24 Frame Frame 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 479 TDM (Time-Division Multiplexing) 7 457 0c20.qxd 9/12/07 ... blazing speed of 75 bps, and later 150 bps. See also AT&T, bps, and telex. type of service (ToS) See To S . TWP (Two-Way Paging) 50 4 7 457 0c20.qxd 9/12/07 12:44 AM Pa...

Ngày tải lên: 14/08/2014, 09:20

... CA 9 459 8 Tel: 9 25. 943. 654 6 Fax: 9 25. 943 .56 00 www.irda.org MFA Forum (merged MPLS, Frame Relay and ATM Fora) 39 355 California Street, #307 Fremont, CA 9 453 8 Tel: 51 0.608 .59 10 Fax: 51 0.608 .59 17 www.mfaforum.org MPLS ... 200 05- 4 754 Tel: 202- 452 -7823 Fax: 202- 452 -0041 Wi-Fi Alliance Previously Wireless Ethernet Compatibility Alliance (WECA) 39 25 West Braker Lane Aus...

Ngày tải lên: 14/08/2014, 09:20