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| -rw-r--r-- | common/chapters/gsup.adoc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/common/chapters/gsup.adoc b/common/chapters/gsup.adoc index 673ed59..7a16e64 100644 --- a/common/chapters/gsup.adoc +++ b/common/chapters/gsup.adoc @@ -766,6 +766,19 @@ Direction: EIR (via HLR) => VLR |0x32|CHECK-IMEI Result |=== +The category of the message is indicated by the last two bits of the type. +Request, Error and Result messages only differ in these last two bits, so it is +trivial to transform them. + +[options="header",cols="20%,80%"] +|=== +|Ending Bits|Message Category +|00|Request +|01|Error +|10|Result +|11|Other +|=== + [[gsup-ie-ipaddr]] ==== IP Address |