From: https://www.txse.com/trading-membership

> TXSE’s primary matching engine is located in Equinix NY6 in Secaucus, NJ, with latency equalization across NY4, NY5, and NY6. Customers outside these buildings will experience additional latency. The disaster recovery (DR) matching engine is hosted in Equinix DA11 in Dallas, TX.

> Customers may connect to DR either directly to DA11 or through TXSE infrastructure at 350 E. Cermak in Chicago. Cermak connections will have traffic backhauled to DA11 over redundant TXSE circuits. Backhaul from Cermak to the production data center is not available.