Contention resolution information

RFC2355 extensions (March, 2003, Draft)
http://www.ietf.org/proceedings/03mar/I-D/draft-ietf-tn3270e-extensions-04.txt
z/OS® Communications Server
Refer to the z/OS Knowledge Center at http://www-01.ibm.com/support/knowledgecenter/SSLTBW_1.12.0/com.ibm.zos.r12/zosr12home.html and search on the tern SNAEXT.
IBM® Communications Server for Linux, Linux on zSeries, AIX®, and Windows
http://www.ibm.com/software/network/commserver