I have discovered an error in the DAL 1.3 Macintosh Installation and User's Guide. The section on Protocol Converter connections, page 45, incorrectly specifies the "Escape" character as ^]. It should be ^[ (that is, Up arrow, LEFT bracket).
It is shown properly in the example for PFkey 3: ^[3.
Thanks for the information. This is helpful to people who use a Protocol Converter and key definitions that include Escape character sequences.