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why sms is only 160 characters long?

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Anonymous
October 26, 2004 6:46:05 AM

Archived from groups: alt.cellular.gsm (More info?)

why sms is only 160 characters long?
October 26, 2004 2:12:54 PM

Archived from groups: alt.cellular.gsm (More info?)

On 26 Oct 2004 02:46:05 -0700, prince_nsa@yahoo.com wrote:
>why sms is only 160 characters long?

It is GSM-standard.

If it were 468, you would have asked the same.


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Anonymous
October 27, 2004 12:55:38 AM

Archived from groups: alt.cellular.gsm (More info?)

<prince_nsa@yahoo.com> wrote in message
news:1098783965.560915.96690@z14g2000cwz.googlegroups.com...
> why sms is only 160 characters long?

Because that's the most they could get into a single GSM signaling "frame"
(I think that's the right term).

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Anonymous
October 27, 2004 11:28:56 AM

Archived from groups: alt.cellular.gsm (More info?)

"prince_nsa@yahoo.com" wrote:

> why sms is only 160 characters long?

Because an SMS can use either a 7-bit, 8-bit or 16-bit alphabet,
the number of bytes needs to be even and a factor of 7 (to
avoid wasted space).

To achieve the elegance of having a number that's a multiple of
10, the choices get further limited to 70, 140, 210, 280, etc
bytes. I can only assume the choice of 140 bytes (160 7-bit
characters) was made over 210 bytes (240 7-bit characters)
because it seemed to be the best compromise between usefulness
and available resources.

John
Anonymous
October 27, 2004 10:20:03 PM

Archived from groups: alt.cellular.gsm (More info?)

On 26 Oct 2004, at 02:46:05 [GMT -0700] (19:46:05 Tuesday, 26 October 2004
where I live) "prince_nsa@yahoo.com" wrote:

> why sms is only 160 characters long?

Yes, but you can send 3 x 160 in one message (network dependant)

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