I can certainly comment. First of all, I'd like to make a clarification. When we say we're closing centres, we are consolidating operations into centres. Basically, the same network of communication towers, radar, and everything else still exists, except instead of going into two separate centres, it's going into one centre in some cases.
When we acquired the new software system for communication control, there were some issues with echos as you've mentioned, and that's why we were delayed in some of the consolidation and modernization of the centres, because we did not accept the software. We were not satisfied with the product. The company came back with another version, and we did very extensive testing of the software to make sure it met our needs.
Once the software was deployed, there was some echo, but it was mostly in only a few centres around the configuration of the console. We developed what we call a patch for adjacent console sound attenuation. Basically, it makes sure there is no echo from one console to another.
As soon as that problem was identified, we worked on the solution and had it implemented. I'm happy to report that it's been implemented in all the centres and it's working well.