bladox.com

[maxmax232]

Hi,

I want to use your Turbo SIM is some embedded application but is worried about the "Pending FETCH request delay" described on http://www.bladox.com/devel-docs/gen_stk.html . If this delay is too long, many applications may be impossible. What is your practical experience with this delay? What are the worst case delay? Can I in practice assume that the Turbo SIM immediately is able to trigger the opening of a user dialog. In other words, how often (practically speaking) does an inactive phone perform a command against the Turbo SIM in which can be used to trigger a FETCH?

Best regards,
maxmax232

[pz]

Thanks for some non iphone and more technical question

As described SIM has to ask ME (phone) to fetch some STK command. This FETCH request can be done in most (but not all) APDU's. So first there needs to be APDU - in the worst case there is no ME-SIM communication ME is polling SIM every about 30 seconds with STATUS APDU. You can change this to about 5 sec but can be phone depending. Once you passed FETCH request is up to the phone to decide when to make the actual FETCH - it can be busy with something else. While all this may sound scary usually there is no noticable delay at all.

So answer to trigger something from SIM side when phone is in idle state would be about 5 sec. But are you sure there will no be any activity/event before on ME side? No user/network event? Many of these can be captured by SIM and trigger FETCH...

[maxmax232]

Thank you very much for the reply

My question is then; What is your experience about the extent to which phones honors the POLL INTERVAL set by the SIM? That is, if I set POLL INTERVAL to 5 seconds, will for example 1 in 10 phones still send STATUS APDU about every 30 seconds? Do you know any specific phones which do not support the setting of POLL INTERVAL?

Anyway, I really think you have made an innovative product! Looking forward to ordering some

Best regards,
maxmax232

[pz]

The problem with POLL INTERVAL used to be with some old Nokia (5+ years old), today it's usually all ok.