Now I'd like to review our progress in Packet Optical, Mobile Backhaul, access and Professional Services. In Packet Optical, we're seeing good customer uptake for new features on the Tellabs 7100 Packet Optical platform. Sales of the packet switching modules increased, marking Tellabs' best quarter ever for packet switching. Our packet switching module can cut capital expenses up to 60% compared with traditional DWDM, plus router architectures.
Sales of Tellabs' 40G transponders tripled compared with the first quarter, marking our best quarter ever for 40-gig transponders. We've been testing our new 100-gig transponder with multiple customers. We're preparing for 100-gig customer trials and deployments in the second half of this year.