A distributed antenna system, DAS, comprising: a host unit; and a plurality of remote units communicatively coupled to the host unit; wherein the host unit comprises a base station subsystem integrated together with a DAS subsystem as a single entity that comprises: a plurality of base transceiver stations; a switch; and a baseband interface to interface between the plurality of base transceiver stations and the switch, wherein the baseband interface is a passive backplane including a plurality of connectors, each connector being configured to have inserted therein an RF channel module including a base transceiver station of the plurality of base transceiver stations, and being configured to electrically couple the RF channel module to the switch; wherein each of the base transceiver stations is configured to operate on a radio frequency, RF, channel and wherein each of the base transceiver stations is configured to provide a downstream baseband digital signal to the switch and to receive an upstream baseband digital signal from the switch, wherein each downstream baseband digital signal and upstream baseband digital signal is a digital representation of the RF signal of the respective base transceiver station at baseband, wherein each RF signal is a wireless signal to be propagated to one or more wireless devices; wherein the switch is configured to route each of the downstream baseband digital signals to a respective subset of the remote units as one or more downstream serial data streams and to route each of the upstream baseband digital signals from one or more upstream serial data streams to a respective subset of the base transceiver stations. a host unit; and a plurality of remote units communicatively coupled to the host unit; wherein the host unit comprises a base station subsystem integrated together with a DAS subsystem as a single entity that comprises: a plurality of base transceiver stations; a switch; and a baseband interface to interface between the plurality of base transceiver stations and the switch, wherein the baseband interface is a passive backplane including a plurality of connectors, each connector being configured to have inserted therein an RF channel module including a base transceiver station of the plurality of base transceiver stations, and being configured to electrically couple the RF channel module to the switch; a plurality of base transceiver stations; a switch; and a baseband interface to interface between the plurality of base transceiver stations and the switch, wherein the baseband interface is a passive backplane including a plurality of connectors, each connector being configured to have inserted therein an RF channel module including a base transceiver station of the plurality of base transceiver stations, and being configured to electrically couple the RF channel module to the switch; wherein each of the base transceiver stations is configured to operate on a radio frequency, RF, channel and wherein each of the base transceiver stations is configured to provide a downstream baseband digital signal to the switch and to receive an upstream baseband digital signal from the switch, wherein each downstream baseband digital signal and upstream baseband digital signal is a digital representation of the RF signal of the respective base transceiver station at baseband, wherein each RF signal is a wireless signal to be propagated to one or more wireless devices; wherein the switch is configured to route each of the downstream baseband digital signals to a respective subset of the remote units as one or more downstream serial data streams and to route each of the upstream baseband digital signals from one or more upstream serial data streams to a respective subset of the base transceiver stations.