Comment 2 for bug 1105225

As part of correspondence on this issue, I received the following statement from Ardie Bausenbach of the Library of Congress:

As documented in the Library of Congress Z39.50/SRW/SRU Server
Configuration Guidelines (http://www.loc.gov/z3950/lcserver.html), the
Library recommends that Z39.50/SRU access to the LC Online Catalog use the
gateway found at lx2.loc.gov:210. This server supports access to a number
of LC databases in a manner that helps the Library balance search query
loads more efficiently. The original Z39.50/SRU ports to the LC Online
Catalog remain operative (z3950.loc.gov:7090 for MARC8 and
z3950.loc.gov:7091 for UTF-8). However, LC prefers that queries of the LC
Online Catalog be sent through lx2.loc.gov:210/LCDB (for UTF-8) and
lx2.loc.gov:210:LCDB-MARC8 (for MARC8).