CTC Union SHDTU03 Manual do Utilizador descarregar pdf (Página 43)

Chapter 5. Configure via Console Port

5-19

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Command: setup e1 frame

<FAS|FAS+CRC4|FAS+CAS|FAS+CRC4+CAS|UNFRAMED>

Message: Please input the following information.

SHDSL E1 frame (TAB Select) <fas+crc4+cas>: unframed

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FAS Frame Alignment Signal use 7-bit patterns to establish

and maintain frame synchronization. The FAS word is

located in timeslot 0 of frame. In FAS mode there are

1~31 timeslot available for use data.

FAS

0 1 2 3 4 5 6 7

8 31

Time Slot

64k 64k 64k 64k 64k 64k 64k 64k 64k 64k1408k

9 ~ 30

Maximun Data Rate 1948kbps

CAS Also known as time slot 16 multiframing. It requires a

multiframe alignment signal to be present for frame

sync. The Multiframe Alignment Signal (MFAS) is

inserted into the 16th timeslot of frame 0 of the 16-

frame multiframe.

In CAS mode, there are 30 channels available for user

data. If timeslot 16 is included in the unit’s mapping, it

will be disregarded.

FAS

0 1 2 3 4 16

Time Slot

64k 64k 64k 64k 64k 64k 64k896k

17 ~ 30

CAS

5 ~ 15

704k

Data Rate (x) 960kbps Data Rate (y) 960kbps

Maximun Data Rate = x + y = 1920kbps

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 67 68

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CTC Union SHDTU03 Manual do Utilizador Página 43