Editing Advanced Communications Riser (section)

==Technology==
The ACR specification provides a lower cost method to connect certain [[expansion card]]s to a [[computer]], with an emphasis on audio and communications devices. [[Sound card]]s and [[modem]]s are the most common devices to use the specification.  ACR and other [[riser card]]s lower hardware costs by offloading much of the computing tasks of the [[peripheral]] to the [[Central processing unit|CPU]].

ACR uses a 120 pin PCI connector which is reversed and offset, retaining [[backward compatibility]] with 46 pin AMR cards while including support for newer technologies. It is also more cost-effective and simple for the manufacturer, since the connectors are identical to the PCI connectors already purchased in quantity. New features supported by ACR include standards for an [[EEPROM]] for storing model and vendor information, [[Universal Serial Bus|USB]] support, and the ''Integrated Packet Bus'' for [[digital subscriber line]] (DSL), [[cable modem]], and [[wireless network]]ing support.