Various techniques are provided for receiving, by a user equipment (UE) from an access node (AN), a first random access channel (RACH) configuration available for random access transmission, receiving, by the UE from the AN, a second RACH configuration including at least one reserved extended spectral resource and an indication configured to cause the UE to enable a spectrally extended RACH transmission, and communicating, by the UE to the AN, using at least a portion of a reserved extended spectral resources.