A high-quality wired 4-port modem/router that offers fast Internet access via your ADSL line with download speeds up to 24 Mbps with ADSL2+ higher upload speeds with Annex M and incorporating a business-class firewall. In addition the 1 x FXS port and 1 x FXO port (PSTN lifeline) allow you to make telephone calls over the Internet using your standard telephone handset with Billion’s renowned built-in Quality of Service (QoS) offering superior call quality and PSTN lifeline giving direct access to emergency services numbers in case of Internet outage