data transmitting in GSM

[Any]

Hello.
I've to solve next project:
I have Pocket PC with GSM-module and measuring instrument, which is connected to the Pocket PC. This instrument is measuring in real-time and software is questioning this instrument. Then the software have to make packets and send it via GSM to the another server. On the server side there is same GSM-module. Packet is near 5-14 bytes. For calling program is using TAPI.
Now about the problems I've to solve:
1. When I sending a small data packet ( for example 14 bytes) another side don't receiving anything. The data is receivibg only when the packet size is near 200 bytes. How can I solve it?
2. When the equipment or server is working in arear with bad GSM-coverage, the program doesn’t receive signal of overflow from the modem and sending data anyway. Then when the coverage is going better the data is lagging because the buffer has many packets of data and begins send it. How can I control that buffer? When the packets are not sending right away they have to ignore but they are exist anyway.
3. Where I can to read about data transmitting in GSM ( for beginners)?

[sad_ghost]

For TAPI data transfers there are two good topics on xda-developers:
http://forum.xda-developers.com/viewtopic.php?t=1716 - for the outgoing data call part
and
http://forum.xda-developers.com/viewtopic.php?t=49727 - for the accepting part.
If you wish to have a better control over the process than i suggest you start digging into RIL (Radio Interface Layer) a little and start building your app based on RIL library.
Good luck

Raul