Fusion customers can toggle between the default download (Annex A) and upload (Annex M) prioritization profiles using the Fusion Self Service tools available as option 2 on 6-1-1 when dialed from a Fusion Voice line. Annex M can provide a boost in upload speed at the cost of download speed and can be useful, for example, when running a large upload. For more information, please see this forum post. Please note that in many cases your modem will need to be reconfigured in order to sync on the Annex M profile and that Sonic’s support is not able to assist with this. If you have questions or need assistance please see our forums.