has anyone seen this algorithm id: Unknown (0xa4) ??
Is that an ALGID you are seeing in wireshark and/or the user
interface? Is it the same ID for all the frames in the call? If its
an intermittent thing then its most probably a bit error. Most of
the fields you see (both in wireshark and the UI) do not have their
errors corrected. Its quite possible that bit errors have rendered a
valid code into an unknown code.