[Cialug] Commerical Interruption

[Josh More]

So the headers are not fixed length?

I would have thought that, transmission-wise, something like:  0000000000 would take just as much as 0110100110.  (Unless there's built-in compression, I suppose.)

-Josh More, CISSP, GIAC-GSLC, GIAC-GCIH, RHCE, NCLP
morej at alliancetechnologies.net<mailto:morej at alliancetechnologies.net>
515-245-7701
________________________________
From: cialug-bounces at cialug.org [cialug-bounces at cialug.org] on behalf of Dave Weis [djweis at internetsolver.com]
Sent: Friday, November 12, 2010 17:12
To: 'cialug at cialug.org'
Subject: Re: [Cialug] Commerical Interruption


But there is a limited amount of space in that header and a limited amount of bandwidth in that channel. It's 'free' until it's full and then everyone is in trouble.
Intercarrier messages are probably just exchanged as bill and keep as volumes are peobably comparable each direction.

________________________________
From: cialug-bounces at cialug.org <cialug-bounces at cialug.org>
To: Central Iowa Linux Users Group <cialug at cialug.org>
Sent: Fri Nov 12 17:02:47 2010
Subject: Re: [Cialug] Commerical Interruption

It was my understanding that SMS basically worked by transmitting data in the unused packet headers for when phones check into the towers.  That's why it was limited to 140 chars and a rapid roll out once it was invented.

Unless I'm wrong about this, there should only be cost overheads when trading messages between carriers.

-Josh More, CISSP, GIAC-GSLC, GIAC-GCIH, RHCE, NCLP
morej at alliancetechnologies.net<mailto:morej at alliancetechnologies.net>
515-245-7701
________________________________
From: cialug-bounces at cialug.org [cialug-bounces at cialug.org] on behalf of Don Ellis [don.ellis at gmail.com]
Sent: Friday, November 12, 2010 17:00
To: Central Iowa Linux Users Group
Subject: Re: [Cialug] Commerical Interruption

Consider how many exchanges consist of one or two words, or even one or two characters, it wouldn't be all that hard to send lots of messages in a very short time.

Remember, the abbreviation for 'OK' is 'K' -- which is what my wife sends to acknowledge my message that I'm on the way home. Message and acknowledgement = 4 messages, my message sent and received, her single character message sent and received. On my plan, messages aren't pooled, so I get hit for one sent, one received, and she gets the same.

Although the cost [to the customer] is the same whether it's a single character or a full SMS message (150 chars), I wonder if the overhead differs? Also, T-Mobile allows in-network SMS greater than 150 characters, so I frequently go over 150. If my recipient isn't in-network (someone other than my wife), they may get dinged for several messages and I only get charged for one.

--Don Ellis


On Fri, Nov 12, 2010 at 3:20 PM, Zachary Kotlarek <zach at kotlarek.com<mailto:zach at kotlarek.com>> wrote:

On Nov 12, 2010, at 3:16 PM, <murraymckee at wellsfargo.com<mailto:murraymckee at wellsfargo.com>> <murraymckee at wellsfargo.com<mailto:murraymckee at wellsfargo.com>> wrote:

> I'm thinking something isn't right with the number.  If you were awake 18 hours a day for 30 days you'd have to send 20 texts and hour every hour to accomplish that.  That just doesn't seem to pass the sniff test.


That message, even without context, would be at least 2 and possibly 4 text messages, and it only took you a couple of minutes to write. I could see 20 an hour, particularly if you're paying for inbound and outbound.

Those who do not remember SMTP are doomed to re-implement it, poorly.

       Zach
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