Dear CME^® Globex^® Customers,

CME is offering an option for customers to reduce bandwidth utilization on their CME Market Data API (MD API) feeds. Implementation of TIBCO RVRD compression will improve delivery of market data in peak market situations until CME DIRECTLink - Ethernet becomes available.

CME is currently enabling TIBCO RVRD compression on all CME MD API Local paths. Beginning May 16, customers may request to use TIBCO RVRD compression. Customers connecting to a CME "compression-enabled" path will potentially see a warning message in their RVRD logs (see message text below*) upon connection to CME (i.e. at the beginning of the week or after a mid-week disconnect) if they do not have compression enabled in their RVRD configuration. This informational message does not impact normal operation of the RVRDs. By default, customers will not receive compression unless customers make additional changes in their RVRD configuration.

Customers who choose to implement compression will see a 40-60 percent reduction in bandwidth utilization which will eliminate potential latencies during peak market activity. (Compression minimally extends the delivery time of market data, which more than offsets latencies experienced in peaks.) CME recommends that compression be used only until CME DIRECTLink - Ethernet is available.

Beginning May 16, 2005, customers wishing to utilize compression should contact their CME Globex Account Manager at 312.634.8700.

Thank you,

CME
800.331.3332

*Error message text:
"Warning: Could not use compression. Neighbor 'Any-name at' requested using compression while this router is not configured to use compression."