terminalAlias and terminalAliasPattern in RCF

[Frank Derks]

The RCF message may include the terminalAlias and terminalAliasPattern elements.

According to the description of the terminalAlias element, it is used to:

1. Inform the terminal about alias addresses by which other terminals may
   identify the terminal
2. To assign an alias (or multiple aliases) to a terminal when it does not
   specify an alias in the RRQ

According to the description of the terminalAliasPattern element, it is used to:

1. Inform the terminal about the alias(es), from the list of aliases in the RRQ,
   that are accepted
2. To assign an alias (or multiple aliases) to a terminal when it does not
   specify an alias in the RRQ

It is not clear whether the contents of terminalAlias "override" the alias(es)
in the RRQ. I.e. should (or shall) the terminal only use an alias(es) from the list
returned in the RCF and forget about the alias(es) that it used in the RRQ? Or
is this information provided so the terminal will accept incoming calls destined
for these returned aliases?

For terminalAliasPattern, this seems to be somewhat clearer, as the description
says something about "acceptable aliases from the RRQ". Still, the text doesn't
go at great lengths to explain what acceptable means.

Regards,

Frank

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