The juniper JX-SFP-1GE-LX transceiver is a kind of hot-swappable input/output optical and electrical transceiver units, which can provide a different interface according to known compliance standards and pre-determined specifications. The juniper JX-SFP-1GE-LX is a Class 1 laser product. It fully complies with the multi-sourcing agreement (MSA) which enables it to work in all MSA compliant platforms. The juniper JX-SFP-1GE-LX must be operated within the specified temperature and voltage limits. The optical ports of the module shall be terminated with an optical connector or with a dust plug.
Actually，the juniper JX-SFP-1GE-LX modules should be compatible for the lower speed by same port; but you should confirm this with your band first. Newer switches typically require a SFP rev B or C or 2/3 depending on what moniker the manufacturer is using. The 10Gb SFP+(SFP plus) sockets are usually backward compatible with SFP Rev.C, but because the SFP+ socket works differently this is not guaranteed.
Fiberstore’s JX-SFP-1GE-LX transceivers are fully compliant with the Multisource Agreement (MSA) specifications, and are fully interoperable with third-party standards-based devices. On account of their small size, JX-SFP-1GE-LX transceivers allow higher port densities than with other transceivers, resulting in more efficient host device design.