- Entry:
- TGU
- Event:
- Node created or updated because of a TG update signal
- Modules Generating Entry:
- ISTTRTLT, ISTTRTTG
This trace record is issued when a node record is created
or node information is changed because of a TG update signal. 
- Byte (hex)
- Contents
- 00–02
- Record ID: C"TGU"
- 03
- Action
- C"C" Create node record
- C"U" Update node characteristics
- C"R" Node has changed node roles
- 04–06
- Flag bytes from the CV4580
- 07
- Number of days left before NDREC is garbage collected
- 08
- Flag byte
- Bit
- Meaning
- 11.. ....
- Node type from NDREC
- B'00'
- End node
- B'01'
- Network node
- B'10'
- Virtual node
- ..1. ....
- Garbage collection indicator from NDREC
- ...1 ....
- Adjacent node indicator from NDREC
- .... 1...
- DLUR end node indicator from NDREC
- 09–17
- 0
- 18–1B
- Resource sequence number from CV4580
- 1C–1F
- First word of timestamp for trace entry