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Framed and unframed in SDH
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Rajukumar Gupta
Feb 28, 2012, 4:15:53 AM2/28/12
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Hi,
What is difference between Framed and unframed in SDH.
What is difference between Framed and unframed in SDH.
Huub van Helvoort
Mar 11, 2012, 6:39:31 AM3/11/12
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Hello Rajukumar,
You asked:
> What is difference between Framed and unframed in SDH.
It is not clear which signals you refer to.
So I have to guess.
If you are talking about client signals, they can be mapped
synchronously
and a-synchronously.
If they are mapped synchronously this means a byte in the client
signal
will be mapped to a byte in the server (SDH) signal. This can only be
achieved
when the client signal is framed, and the mapping can start after
framing is achieved.
If a client signal is mapped a-synchronous, this means that a bit of
the client signal
is mapped in a bit of the server (SDH) signal, no frame alignment is
needed, so
this can be considered as unframed mapping.
Best regards, Huub.
You asked:
> What is difference between Framed and unframed in SDH.
So I have to guess.
If you are talking about client signals, they can be mapped
synchronously
and a-synchronously.
If they are mapped synchronously this means a byte in the client
signal
will be mapped to a byte in the server (SDH) signal. This can only be
achieved
when the client signal is framed, and the mapping can start after
framing is achieved.
If a client signal is mapped a-synchronous, this means that a bit of
the client signal
is mapped in a bit of the server (SDH) signal, no frame alignment is
needed, so
this can be considered as unframed mapping.
Best regards, Huub.
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