Zoom ZoomTel ADSL X5v. DSL connection type: ADSL, Upstream data rate: 0.896 Mbit/s, Downstream data rate: 8 Mbit/s. Networking standards: IEEE 802.1D, IEEE 802.3, Number of users: 253 user(s), Supported WAN type: PPPoATM (RFC 2364) & PPPoE (RFC 2516).. Routing protocols: RIP V1, RIP V2, VoIP protocols: SIP (RFC 3261). Firewall security: SPI, NAT, NAPT, Authentication method: PAP, CHAP. Certification: CE, UL, C-UL, FCC Part 15B, FCC Part 68, CS-03.