Re: smsc_at2.c PDU coding

On Freitag, November 8, 2002, at 02:13  Uhr, Stipe Tolj wrote:

> From: Stipe Tolj <[email protected]>
> Date: Fre Nov 8, 2002  2:13:12  Uhr Europe/Zurich
> To: "[email protected]" <[email protected]>
> Subject: smsc_at2.c PDU coding
>
> Hi list,
>
> I have some problems with an Siemens M20. So I came across the gsmlib
> project at http://www.pxh.de/fs/gsmlib/index.html.
>
> When sending the same payload "tes" to same number on same device
> /dev/ttyS1.
>
> Debug output of gsmlib's gsmsendsms:
>
> <-- +CSMS: 1,1,1
> <--
> <-- OK
> --> AT+CMGS=17
> <--
> --> 0015000B811037353312F60000A803F4F21C?
> <--
> <-- +CMGS: 84
> <--
> <-- OK
>
>
> Debug output of smsc_at2.c:
>
> AT2[m20]: --> AT+CMGS=17^M
> AT2[m20]: <-- >
> AT2[m20]: send command status: 1
> AT2[m20]: --> 0011000C919471533323610000A703F4F21C
> AT2[m20]: --> ^Z
> AT2[m20]: <-- >
> AT2[m20]: <-- +CMGS: 89
> AT2[m20]: <-- OK
>
> can someone explain to me why the PDU string is differently?!

I've decoded the stuff here. Here's the output:

2002-11-08 08:37:45 [0] INFO: Decoding: 
15000B811037353312F60000A803F4F21C
2002-11-08 08:37:45 [0] INFO: 
[TP_MTI:1:SMS-SUBMIT][TP_MMS:0][TP_SRR:0][TP_UDHI:0][TP_RP:0][TP_VPF:2]
2002-11-08 08:37:45 [0] INFO: SMS SUBMIT PDU
2002-11-08 08:37:45 [0] INFO: destination in pdu: 
[TON:0][NPI:ISDN][ADR:01735333216]
2002-11-08 08:37:45 [0] INFO: PID: 0
2002-11-08 08:37:45 [0] INFO: DCS: 0
2002-11-08 08:37:45 [0] INFO: VP is relative: 168
2002-11-08 08:37:45 [0] INFO: User Data Len: 3
2002-11-08 08:37:45 [0] INFO: TEXT: tes
2002-11-08 08:37:45 [0] INFO: tp_mr: 0
2002-11-08 08:37:45 [0] INFO: tp_udhi: 0
2002-11-08 08:37:45 [0] INFO: tp_udh:

and the second one

2002-11-08 08:37:09 [0] INFO: Decoding: 
11000C919471533323610000A703F4F21C
2002-11-08 08:37:09 [0] INFO: octet 1: 17
2002-11-08 08:37:09 [0] INFO: 
[TP_MTI:1:SMS-SUBMIT][TP_MMS:1][TP_SRR:0][TP_UDHI:0][TP_RP:0][TP_VPF:2]
2002-11-08 08:37:09 [0] INFO: SMS SUBMIT PDU
2002-11-08 08:37:09 [0] INFO: destination in pdu: 
[TON:INT][NPI:ISDN][ADR:491735333216]
2002-11-08 08:37:09 [0] INFO: PID: 0
2002-11-08 08:37:09 [0] INFO: DCS: 0
2002-11-08 08:37:09 [0] INFO: VP is relative: 167
2002-11-08 08:37:09 [0] INFO: User Data Len: 3
2002-11-08 08:37:09 [0] INFO: TEXT: tes
2002-11-08 08:37:09 [0] INFO: tp_mr: 0
2002-11-08 08:37:09 [0] INFO: tp_udhi: 0
2002-11-08 08:37:09 [0] INFO: tp_udh:


So the difference is only in the "MMS" (More Messages to be Sent) field 
and the type of number.
In the first case its submitted as national number in the second as 
international.
Also the validity period differ by one.

both PDU's have "tes" as content.




Andreas Fink
Global Networks, Inc.

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