Should 10gbe sfp+ 850nm be able to interface with 1gbe sfp 850nm?

I've got some dell and hp switches and oem optical transceivers of each that I am unable to get an active link on when connecting as title states. All the firmwares are newest releases. Next step is I will manually set speeds on interfaces. Anyone here have success with connecting 10gbe to 1gbe optical of different manufacturers?

Optical doesn't auto negotiate. You either need 10GbE on each end or 1GbE on each end.

Like Nicklebon said Optical must match specs on both ends. While the two sides can talk auto-negotiation protocols, they can't run at different speeds or duplexes. You need to get a second matching optic of the type you want to use.