A wireless backhaul link is established between an integrated access and backhaul (IAB) node and an IAB donor node via a Narrow-Band Internet-of-Things (NB-IoT) or frequency division duplex (FDD) carrier. The IAB donor node may provide the IAB node with access to a wired backhaul connection that links to a core network of a wireless carrier network. One or more corresponding backhaul links are established between the IAB node and one or more additional IAB nodes via a one or more corresponding NB-IoT or FDD carriers. A wireless access link is established between the IAB node and an NB-IoT user device or between the IAB donor node and the NB-IoT user device via an NB-IoT carrier. Additional wireless access links may be established between a wireless user device and the IAB node via at least one of a TDD, FDD, or NB-IoT carrier.