using modem for v.23 fsk data

[fsksms]

Hi,
I need to transmit v.23 fsk data over the phone line. I have a binary sequence and need to use the modem to generate the fsk signal. How can I do that with a 56K modem?
It is actually to simulate an sms transmission.

 

[Comtech]

You need an init string. Depending on chipset (Morotolla, Conexant/Rockwell, TI (USR), Lucent, Ambient/Intel) they're slightly different.
Tell us what chipset, and we'll get you the init to use V.23

Cheers,
Jim

http://members.cnx.net/reboot/

 

[fsksms]

It is a US Robotics 56k Message Modem. I downloaded their connection manager and disabled all modulations except v.23. But i need to transmit the sequence without any negotiation from the other side. Something like sending data to a dumb terminal.
It's actually to simulate SMS transmission over phoneline. Data must be transmitted in v.23 (1200 bps/FSK). Could you suggest some other method to do that? maybe some software?
Thanks.

 

[Comtech]

If all you want is a connection, no actual handshake, and simple data stream sent via software, use "ATD;" as the last portion of the init string.
This will simply set the modem in a command mode.
You may have to manually issue the send data command after that.
There are lots more on S registers, and the full command code set here:

http://www.usr.com/support/3453/3453-command-ref/appd 1-s registers.html

Cheers,
Jim

http://members.cnx.net/reboot/

 

[flippertheskipper]

I hope "fsksms" will still be there ...

Hi fsksms,

Did you succeed with your sending of SMS using v.23 fsk ?

I'm more an advanced user than a true programmer ... so, if you did succeed, can you explain to me in very simple words how to send an SMS directly from a PC to a SMSC ...

Since 2 days, I'm looking for a software on the web and I haven't found any ...

Thanks for your answer ... and sorry for my english (I'm a french-speaking belgian)

Keywords:

landline
fixed-line
fixed line
etsi
v23
v.23
201 912
sms
modem

 

[compgirlfhredi]

http://www.cswl.com/whiteppr/tech/sms.html

 

[flippertheskipper]

Thank you for your reply compgirlfhredi,

This article was very interesting.

But maybe I wasn't clear enough in my explanations ...

Hereunder a mail that I've sent to another group and which explains in more details:
--------------------------------------------------
Hi everybody,

In my country (Belgium), it is possible to send and receive sms on an
analogic landline ...

The people who want this service just need:

- to ask Belgacom (our national company) to activate it
- to have a sms-capable phone (Belgacom models: Messaggio, Maestro)

In a few days, I'm going to run an internet site and I would like to be able to send/receive SMS to/from my members on my landline ... of course I could pay a specialized company to do that for me but it's quite expensive ... I could also use a standard GSM, but the network coverage is not very good in my area ...

So my idea was: if a phone which costs about 25 €/$ can do the job, it must be possible to do it with a PC and a modem ... and I was quite sure to find standard software in order to do that ...

Unhappily, after 15 hours of research on internet, I haven't found much ... I now know a lot about ETSI 201 912, v23, fsk ... but I'm still not able to send a sms directly to a smsc ...

I must say that I'm not a true programmer ... I would describe myself as a very advanced user ...

So if you can help me, try to keep it simple ...

Thanks for your answers and have a good day ...

Bye

Philippe


Keywords:

sms pc computer etsi 201 912 v23 v.23 fsk modem landline fixed line fixed-line
--------------------------------------------------

 

[compgirlfhredi]

All I could find was this:

http://www.kannel.org/download/1.1.6/userguide-1.1.6/userguide.html

I have developed a sms server application before, I used SMSSDK from

http://www.derdack.com

The SDK has 30 day trial, and there are 2 components to the SDK, one is for GSM/PCS, one is for Modem/ISDN.
Most GSM Modems takes the same amount of time to send one sms message.
With GSM/PCS, all you need is a GSM Modem or a cell phone, but it takes 6 seconds to send 1 message.
With Modem/ISDN, you need to have a connection with the phone company, but the speed is way faster.
You only need 1 modem for both incoming and outgoing.
The cost would be the cost to send sms messages using on your cell network if using GSM. For Modem, I think the phone company charge by the time you connect to their network.

SolveIT.com
This web site provides an illustration of SMS with information on the architecture involved.

Dealing with SMS Demands
This is a useful article on dealing with network demands in supporting SMS. This is useful to carriers.

Motorola Wireless Solutions
Motorola provides a wide range of engineering resources for companies building digital wireless networks or maintaining analog networks.

This is something I didn't know existed(no use, but interesting)

http://www.picobox.biz/Product/Mm.htm

 

[compgirlfhredi]

Now I will gracefully step back and allow someone who can actually HELP you, take over...

 

[flippertheskipper]

Hi everybody,

This message to let you know that I am a little bit further ... I achieved to call the SMSC and the SMSC answered me with a TAS (Terminal Equipment Alerting signal) consisting of 2 tones separated by a couple of seconds (as described in ETS 300 659-1) ... the trick was to call the SMSC with the "sub-identifier" address (number of smsc is 1717 and I had to do atdt171700) ...

And now I have to begin the data transmission in fsk modulation ... but I really don't know where I'm going and if it's possible to go all the way ...

So help is still welcome ...

 

[tsa3d]

Hi flippertheskipper

I would like to start the same project you are working on.
I have the ETSI ES 201 912 standard.
Is there any SDK that I should work with?
Please give me the main idea

Thanks

 

[NTSPaul]

Hi,

The general problem is that off the shelf modems do not surport V.23 half duplex.

A product has just become available that does suport V.23 half duplex, you can also send a fixed line SMS using AT commands.

http://www.z-text.com

Paul