Are all antenna and form factor variants of the LT1110 / PRM240 supported by the PRM240-R2?

LT1110PRM240-R2453-00418

Answer

No. The PRM240-R2 is available exclusively as a pluggable module with an onboard U.FL connector (Part Number: 453-00418). While it is a direct drop-in replacement for pluggable U.FL LT1110/PRM240 designs, legacy variants with integrated chip/trace antennas or surface-mount (SMD) packaging are not directly replaced by this part number.  

For a full list of antennas certified with the PRM240-R2 please reference section 8.2 of the PRM240-R2 Datasheet.