FACTOID # 159: Taiwan and Luxembourg are the only countries in the world where the mobile phones outnumber the people!
 
 Home   Encyclopedia   Statistics   Countries A-Z   Flags   Maps   Education   Forum   FAQ   About 
 
WHAT'S NEW
RECENT ARTICLES
More Recent Articles »
 

FACTS & STATISTICS    Simple view

  1. Select countries to view: (hold down Control key and click to select several)

     

     

    Compare:

     

     
  1. Select fact or statistic: (* = graphable)

     

     

     

  2. (OPTIONAL) Compare to statistic: (both need to be graphable)

     

     

     

  3. View result as:

     

       
(OR) SEARCH ALL encyclopedia, stats & forums:   

Encyclopedia > Extended Super Frame

Extended Super Frame (ESF) is a T1 framing standard. Sometimes called D5 framing. Preferred over its predecessor, Super Frame, because it includes a Cyclic Redundancy Check and bandwidth for a data link channel (used to pass out-of-band data between equipment).


In ESF, a superframe is 24 frames long, and the 193rd bit of each frame is used in the following manner:


• Frames 4, 8, 12, 16, 20, and 24 are used to send the framing pattern, 001011.


• Frames 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21 and 23 are used for the data link. (Totalling half of all framing bits, or 4000 bits per second.)


• Frames 2, 6, 10, 14, 18, and 22 are used to pass the CRC total for each superframe.


  Results from FactBites:
 
Frame timing acquisition method and system for cordless TDMA systems - Patent 5570370 (8721 words)
In such a frame structured communication scheme, it is important that each portable transceiver 12, 14 and 16 be synchronized with the frames (i.e., in relation to the base station 18) initially, when it is desired to initiate a communication, and to maintain such synchronization during communication.
In response to a locally generated framing clock, each bit of the locally generated framing pattern is compared to a received bit of the extended super frame of the bitstream, which received bit is believed to be a corresponding framing bit.
The frame time acquisition circuit also has a decision circuit for identifying boundaries of a frame of the received bitstream in response to the CRC check circuit determining that the third subsequence is a cyclical redundancy code parity word formed from the second subsequence.
  More results at FactBites »


 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments
Please enter the 5-letter protection code

Want to know more?
Search encyclopedia, statistics and forums:
 


Lesson Plans | Student Area | Student FAQ | Reviews | Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.