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Topic: B3ZS


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In the News (Fri 24 Nov 17)

  
 Enhanced B3ZS decoder and method for identifying true zero-substitutions - Patent 5631928
The B3ZS decoder of claim 8, wherein said first register means comprises a first linear array shift register for receiving a positive train of said pulse train signal, and a second linear array shift register for receiving a negative train of said pulse train signal.
Thus the enhanced B3ZS decoder and method of the present invention is capable of restoring corrupted zero substitutions and minimizes erroneous substitution of zeros for certain error-related BPVs.
The enhanced B3ZS decoder of the present invention avoids this problem by using the shift register 26 to perform the resubstitution, thereby ensuring that the positive and negative data rail shift registers 22 and 24 retain the information of the received substitution pattern.
www.freepatentsonline.com /5631928.html?highlight=4799217   (3334 words)

  
 B3ZS   (Site not responding. Last check: 2007-10-13)
A T-carrier line code in which bipolar violations are deliberately inserted if user data contain a string of 3 or more consecutive zeros.
Note 1: B3ZS is used to ensure a sufficient number of transitions to maintain system synchronization when the user data stream contains an insufficient number of "ones" to do so.
Note 2: B3ZS is used in the North American hierarchy at the T3 rate.
www.termsdefined.net /b3/b3zs.html   (262 words)

  
 Interfaces for cross-connect system - Patent 5596730
Binary three zero substitution (B3ZS) is the standard technique for the DS3 interface to augment a basic bipolar code by replacing all strings of three zeros with a special three-length code containing several pulses that purposely produce bipolar violations.
The scrambled output of the STS-1 receive processor 22 is applied to the E input of the selector 26, and the output of overhead/pointer processor 31 is applied to the demapping unit 23, which includes a destuffing circuit 40 for extracting the DS3 payload signal from the incoming STS-1 signal.
To the output of B3ZS decoder 50 is connected a scrambler 51 for scrambling the DS3 signal and applying the scrambled DS3 signal to the input F of selector 26.
www.freepatentsonline.com /5596730.html   (3507 words)

  
 F230X FOM II Series DS3 Fiber Isolators Tech Manual
Electrical DS3-standard 3-zero substitution (B3ZS) signals on coaxial cable are input via two 75* BNC connectors, encoded for optical transmission by one modem, transmitted over fiber cable to a second modem where the signal is decoded and output via two 75* BNC connectors.
In a working unit, B3ZS data from the copper interface is encoded and transmitted through the optical circuit via fiber optic patch cord.
The data signal is then re-encoded to the B3ZS protocol and output to the BNC electrical signal interface.
www.fiberopticmodems.com /f230x.html   (2268 words)

  
 B3ZS - Wikipedia, the free encyclopedia
Ones in a data stream are used by receiving equipment to synchronize with the sending equipment.
Consecutive one bits of the same polarity is known as a BPV, or Bi-Polar Violation.
The rules of B3ZS state that a string of 3 zeroes must be replaced with either:
en.wikipedia.org /wiki/B3ZS   (396 words)

  
 Fourth-order digital multiplex system for transmitting a plurality of digital signals at a nominal bit rate of 44 736 ...   (Site not responding. Last check: 2007-10-13)
As signal processing in transmitter 1 is effected on the basis of signals in the normal binary code, each of the three B3Zs coded signals D1, D2, D3 is applied to a B3Zs-adapter 4, in which after regeneration by means of a recovered clock signal a conversion into a binary signal is effected.
Each of the binary signals d1, d2, d3 thus obtained is applied together with the associated clock signal to a jitter reducing unit 5, in which the value of the peak-to-peak jitter amplitude, depending on the jitter frequency, is reduced to approximately 1.5 UI.
A second reason is that differences of frequency between the tributary bit streams which may be received from independent sources, and the system clock for the higher-order bit stream must be coped with.
www.wikipatents.com /4535451.html   (4324 words)

  
 Cisco - Troubleshooting Line Problems and Errors on DS-3 and E3 ATM Interfaces
These line coding methods are again designed to maintain synchronization by ensuring a sufficient number of binary ones.
B3ZS or HDB3 - Receiving two successive pulses of the same polarity, but these pulses are not part of zero substitution.
Excessive is defined as greater than three zeros for B3ZS and greater than four zeros for HDB3.
www.cisco.com /warp/public/121/d3e3_tshoot.shtml   (1346 words)

  
 Canoga Perkins 2345 Fiber Optic Modem   (Site not responding. Last check: 2007-10-13)
The EdgeAccess® Canoga Perkins 2345 Fiber modem is an SNMP managed multi-featured fiber optic modem that optically extends standard T3/DS3 (44.736Mbps) over single mode or multimode fiber optic cable.
It is designed to enable Service Providers, Carriers, Government, Military and Corporate Enterprise to expand the capabilities of their existing data communications infrastructure.
The 2345 transports any B3ZS coded, framed data stream and provides a transparent link extension when transporting C-bit Parity and M13 framed signals.
www.data-connect.com /Canoga_2345.htm   (350 words)

  
 Amazon.com: B3ZS   (Site not responding. Last check: 2007-10-13)
B B B1 B2 B3 B3ZS Bearer channel, a DSfO for...
Bipolar with 3-zero substitution (B3ZS) is used at the DS3...
North American hierarchy specifies a B3ZS (bipolar with three zero substitution)...
www.amazon.com /s?ie=UTF8&keywords=B3ZS&tag=acronymfinder-20&index=blended&link_code=qs&page=1   (1096 words)

  
 T3 - E3 Fiber Optic Modem, compatible with B3ZS (T3) and HDB3 (E3)
T3 - E3 Fiber Optic Modem, compatible with B3ZS (T3) and HDB3 (E3)
The TC1680 is compatible with B3ZS (T3) and HDB3 (E3) coded data streams and conforms to applicable standards including ANSI T1.102-1993, TR-TSY-000499 and CCITT G.703.
It is compatible with B3ZS (T3) and HDB3 (E3) coded data streams and conforms to applicable standards including ANSI T1.102-1993, TR-TSY-000499 and CCITT G.703.
www.arcelect.com /T3-E3_Fiber_Optic_Modem.htm   (390 words)

  
 www.metering.com | WAN
It includes clock recovery and transmitter pulse shaping functions for applications using 75-ohm coaxial cable at distances up to 1200 feet long end-to-end or up to 750ft long from a DS3 cross connect.
The receiver recovers clock and data from a B3ZS or HDB3 coded AMI signal.
It can compensate for over 12dB of cable and 6dB of flat loss.
www.metering.com /taxonomy/term/392/all?from=0   (992 words)

  
 T3 DS3 E3 Managed Media Converter
Supports B3ZS for T3 (DS3) and HDB3 for E3 codes
Supports Dual Fiber and single-fiber with distances of up to 120km and 40km respectively
It supports B3ZS line coding for T3 (DS3) and HDB3 for E3.
www.omnitron-systems.com /products/8740_t3e3_iconverter.php   (895 words)

  
 Tektronix ST103A - Advanced Test Equipment Rentals   (Site not responding. Last check: 2007-10-13)
DSX-1: B3ZS or AMI, monitor or terminate levels
SESs: Total for x or more CVs or OOF (X=9 for STS-1Rate, x = 16 for OC3 rate, x = 63 for OC12 rate)
Data - Bipolar: Three STS-1 outputs, B3ZS encoded, front-panel 75 ohm BNC
www.atecorp.com /Equipment/Tek/ST103A.htm   (354 words)

  
 Canoga Perkins 2245 Fiber Optic modem for DS3 extensions
The Model 2245 is a multi-featured fiber optic modem that transmits standard DSX-3 (44.736 Mbps) signals over singlemode or multimode fiber optic cable.
The 2245 transports any B3ZS coded data stream with either framed or unframed formats.
It provides complete diagnostic and fault isolation features when transporting M13 or C-bit parity framed DSX-3 signals.
www.arcelect.com /Canoga_Perkins_DS3_Fiber_Optic_Modem.htm   (357 words)

  
 DS31612, DS3166, DS3168 6/8/12 ATM/Packet PHYs for DS3/E3/CC52
Each unit has independent receive and transmit paths.
The receiver block performs data recovery from a B3ZS or HDB3-coded AMI signal and monitors for loss of the incoming signal and can be bypassed for direct clock and data inputs.
The transmit block performs B3ZS/HDB3 encoding and can be bypassed for direct clock and serial data outputs.
www.maxim-ic.com /quick_view2.cfm/qv_pk/4821   (462 words)

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