The Cisco SPA122 ATA with Router:

Enables high-quality VoIP service with a comprehensive feature set through a broadband Internet connection
Provides high-quality, clear-sounding voice, using advanced voice quality-of-service (QoS) capabilities and the industry-leading voice Session Initiation Protocol (SIP) stack
Supports reliable faxing with simultaneous voice and data use
Includes two standard telephone ports, each with an independent phone number, for use with fax machines or analog phone devices, and one fast Ethernet WAN port, and one fast Ethernet LAN port for local home or business network connection
Is compatible with all industry voice and data standards and common telephone features such as caller ID, call waiting, and voicemail
Includes a simple-to-use web-based configuration utility for easy deployment
Specifications:

Data networking: MAC, IPv4, DNS, TCP, UDP, RTP, RTCP, VLAN, SNTP, SIP Channesls on UDP and TCP (SPA122 comes with DHCP Client Reservation, acts as a LAN Router)
Voice gateway: SIPv2, SIP proxy redundancy
Codec: G.711 a-law/u-law, G.726, G.729, DTMF in-band and out-of-band, or SIP Info
Voice Features: MWI, VMWI, Polarity Control, MoH, Call Waiting, Caller ID, Call Forwarding, Conference, Distinctive Ringing
Fax: Fax tone detect, pass-through using G.711
Security: Password-protected system and admin, HTTPS, HTTP, 256-bit AES, SIP TLS
Physical Interface: 1 RJ45 WAN 100Base-T, 1 RJ45 LAN 100Base-T, 2 RJ11 FXS Phone Ports for analog telephone device, Reset Button
Power Supply: 5V DC at 2.0A (included 100-240V US Plug Power Cube)
Dimensions: 3.98 x 3.98 x 1.1 in.
Package Contents:

Cisco SPA-122 ATA
5V2A Power Adapter
6' Ethernet RJ45 Cable
Quick Start Guide

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