Re: Ali again " Brain please check this for M2PA

ali,

> 
>    "If  we  take  average  message length as 40 octet for an ISUP message
>    than
> 
>    After reaching the SG (signalling gateway), SIGTRANS M2PA encapsulated
>    the SS7 message data and attached headers in it.
> 
>    The headers are of 2 types Common message header and M2PA header.

You are missing the DATA chunk header, SCTP packet header, IP packet header
and possibly Ethernet or IEEE 802.something header.

--brian

> 
>    The  common  message header is of 8 bytes and M2PA header is also of 8
>    bytes.
> 
>    The  User  data  or SS7 Message data is the data from MTP3. so it dont
>    contains  flag  1 byte, BSN and BIB 1 byte, FSN and FIF 1 byte, Length
>    indicator  1  byte,  and  check sum 2 bytes. Which all together make 6
>    bytes.  After  subtracting  6  bytes from average message length of 40
>    bytes we get 34 bytes.
> 
> 
>    So  SS7oIP  for M2PA generates 34+16 bytes = 50 bytes of data per ISUP
>    message.
> 
>    As  there  are 5 messages in typical ISUP call so 50 * 5= 250 bytes of
>    SS7oIP data is generated per ISUP call."
> 


-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/