At 7:31 PM +0900 9/4/05, Pakcik wrote:
(kenapa ya cuma terbatas 160
char????)
ini gak tau kenapa.
karena masih numpang signaling channel SS7 yang terbatas payload-nya.
http://en.wikipedia.org/wiki/Short_message_service
Transmission of the short messages between SMSC and phone is via SS7
within the standard GSM MAP framework. Messages are sent with the
additional MAP operation forward_short_message, whose payload length
is limited by the constraints of the signalling protocol to precisely
140 bytes. In practice, this translates to either 160 7-bit
characters, 140 8-bit characters, or 70 2-byte characters in
languages such as Chinese, Korean, Japanese or Slavonic languages
(e.g. Russian) when encoded using 2-byte UTF-16 character encoding
(see Unicode). This does not include routing data and other metadata,
which is additional to the payload size.
makanya sms via gprs / tcp/ip mestinya lebih "murah", karena masalah
routing pun tetap ada di SMS tradisional. keunggulan sms via IP itu
ya payload bisa lebih besar tanpa membebani jalur signalling.
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