Zoom 5801 Voice over IP Telephone Adapter Zoom 5801 Voice over IP Telephone Adapter, Grey, FXS, FXO, FCC 15B, ICES-003, IC LS-03, CE, CSA (C, US), IEEE 802.1q, IEEE 802.1p, G.711, G.729, iLBC, 0.575 x 0.441 x 0.11" (14.6 x 11.2 x 2.8 mm)
-Contains both FXS and FXO ports; supports bridging and cell phone VoIP access. -Clear, natural-sounding voice quality. -Zoom's Teleport feature allows automatic access to public phone network for. -emergency services like E911 and 112 calling. -Uses industry-standard Session Initiation Protocol (SIP). -Supports Quality of Service (QOS). -Supports advanced telephone services including CLASS features. -Configurable for SIP-based VoIP services. -Supports automatic provisioning by service providers. -Proven compatibility with SIP-standard servers from Asterisk, Cisco, NetCentrix, Quintum and more.