October 2018
Intermediate to advanced
555 pages
17h 33m
English
Content preview from Principles of Synchronous Digital Hierarchy
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215Plesiochronous Digital Hierarchy
taken as a data bit. A majority decision is accepted in case the values differ
from these.
Similar to the lower order bit streams such as E2 and E3, various param-
eters of E4 multiplexing can be calculated as under
(i)
Number of frames per second Data rate/number of
=
bits per frame
/=
=
139 264 000 2928
47 562 8415
, ,
, .
(ii)
Duration of each frame s/=
=
1 47 562 8415
21 024816
, .
. 22 sµ
(iii)
Minimum bit rate per second (for E4 bit stream)
== minimum number of tributary data bits per framme
number of frame per second×
= ×2888 47 562 841, . 55
137 361 486= , , bits/s
Therefore, the minimum data rate per second for each E3 tributary
= 1,373,361,486/4
= 34,340,371.5 bps
= 34.34 Mbps (approximate)
(iv) The max
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