Sometimes it is desirable to have multiple entries for a single system, for instance if the system can be reached on different modem lines. With Taylor UUCP, you can do this by defining a so-called alternate.
An alternate entry retains all settings from the main system entry, and and specifies only those values that should be overridden in the default system entry, or added to it. An alternate is offset from the system entry by a line containing the keyword alternate.
To use two phone numbers for pablo, you would modify its sys entry in the following way:
system pablo phone 123-456 ... entries as above ... alternate phone 123-455
When calling pablo, uucico will now first dial 123-456, and if this fails, try the alternate. The alternate entry retains all settings from the main system entry, and overrides only the telephone number.