The final test

E1 Which specification has CT1 changed more than any other over the whole record?

• TS 24.229, with 3413 change documents
• TS 24.301, with 5422 change documents
• TS 24.501, with 15623 change documents

E2 Of the 229 active CT1 specifications, how many are technical reports rather than technical specifications?

• 30
• 199
• 229

E3 In TS 24.501, what is the second job of the rules for unknown, unforeseen and erroneous data?

• They decide which release a message belongs to
• They let the protocol be extended later without breaking the phones already in the field
• They tell the network when to bill the subscriber

E4 Who starts the registration procedure between a phone and the 5G core?

• Always the network
• Either end, whichever notices first
• Always the phone

E5 How many documents were put to meeting C1-161?

• 172
• 617
• 4235

E6 What kind of body is CT1?

• A company forum that publishes recommendations
• A working group of 3GPP
• A regulator that licences phones

E7 How many of the specifications listed against CT1 are still active?

• 175
• 229
• 237

E8 How many of the 4235 CT1 documents of the last twelve months were change requests?

• 563
• 2835
• 4235

E9 A CT1 meeting has just ended. What does the record tell you about why a document was postponed?

• Nothing — it holds the outcome word and no reason
• How many companies voted against it
• The objection that was raised

E10 How many different organisations put at least one document to CT1 in the twelve months to 2026-08-04?

• 44
• 415
• 6