Odd that you can have more than, say, two at a time.
That I've never done that, given very limited access,
does not mean you can't have twenty zillion options!
Mine has not been set up for a few years, so there are none
present in the System Preferences> Network> Network Port
Configurations> Internal Modem> settings.
So, without that in use, the Internal Modem in mine no longer
appears in the list of active items (unless I checkbox it & click
on the Apply button) & then access to change settings appears.
There is a main number (blank) and a secondary (also blank.)
To add a number, click in box and keyboard it in; to remove a
number, drag through the existing with mouse & hit Delete key
in the standard keyboard selection (not delete/box key) and
that would normally be the way to add/remove phone numbers.
This is rather basic, when it works. Simple.
Maybe there is an option to add âž• and subtract(-) from the list.
And if traveling or have several different Locations set up, then
you could have other numbers or access points covered; be it
for wireless or other network sets you may use.
The Mac OS X Help viewer in the menu bar should list some
content on this issue; probably the basic information. That can
at times attempt to connect to the Apple Support help, so it
could be slow to respond if Help tries getting internet content.
Though I did not look deeply (and have never had more than
two numbers per Network for dialup internet) the Apple Support
home page for Tiger 10.4 may be a place to look for articles:
http://www.apple.com/support/tiger/
Several promising leads appear when I chose to Search in the
Apple Support Tiger 10.4 with ' +*Mac OS X 10.4 Tiger dialup*+ '
entered into the search box, from the above page link...
http://support.apple.com/kb/index?page=search&src=supportsite.home&locale=enUS&q=Mac%20OS%20X%2010.4%20Tiger%20dialup
Good luck & happy computing! 🙂
{ edited to add words - too many? }
