z39.50 is a protocol used with searching library catalogues.
To search the University of ZenUni library catalogue using z39.50 the target values are:
In MarcEdit:
Host = prism-z3950.ZenUni.ac.uk
Database = prod_talis
Port = 210
Syntax = MARC21
In Mercury z39.50 client use these values:
Name = prism-z3950
Z39.50 URL = prism-z3950.ZenUni.ac.uk:210/prod_talis
Record Type = marc21