This is the fallback layout which I believe is only used in the event of a Telephone error.
The CMT4000 in the 528i would (prior to sourcing a SIM card the size of a surfboard) display "INSERT CARD!" using this layout.
I stumbled upon another message "Phone Connected?" in a random YouTube video which I presume is for the later Motorola V-Series cradles with detachable handsets.
- can only be created by
0x23
- there is only a single line
- not possible to use carriage return/link break
C8 <LEN> 3B 23 00 00 "23 00 Default Layout" <CS>
# Prefix string with control character 0x01
C8 <LEN> 3B 23 00 00 "Here is some..." 01 "flashing text!" <CS>
Default > SOS > SOS 3B 06 C8 31 00 05 08 <CS> # Press