prtChannelInformation stands alone with its own character coding
specified according to David's revised specification, since the
spec for each enum value specifies the coded character set that
follows the "=" sign.
I had written:
David Kellerman's revised prtChannelInformation also adds:
R prtChannelInformation OCTET STRING
What we should do is follow Jay's suggest to use a TC for the
objects that are under control of whichever alternative we choose
and leave prtChannelInformation as an OCTET STRING, since its code
set varies depending on the enum.