Help with silent call

Neels Hofmeyr nhofmeyr at
Mon Nov 19 13:30:05 UTC 2018

On Fri, Nov 16, 2018 at 01:36:41PM +0000, Snehasish Kar wrote:
> Neel,


> The APDU that you are referring here is the one used with binary SMS.

No, I'm referring to the RR Application Information message.
The one pointer I'm finding now is 3GPP 48.018 3.4.21 Application Procedures
and 9.1.53 in the same.

All we did with that in Osmocom so far was dump this APDU to the log and the
subscriber database, though that was using old openbsc (osmo-nitb). Right now
with osmo-bsc / osmo-msc we simply ignore it.

I'm not familiar with any details on decoding it.

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