Device Provisioning Web Interface and secure (AES encrypted) central configuration file for mass deployment. NAT-friendly remote software upgrade (via TFTP/HTTP)
Telephony Features Dynamic negotiation of codec and voice payload length VAD, CNG, AGC In-Band and out-of-brand DTMF (in audio, RFC2833, SIP INFO) Adaptive jitter buffer control with packet delay & loss concealment
Network and Protocols Fixed IP, DHCP, automated NAT traversal via STUN SIP RFC3621, TCP/UDP/IP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, NTP, TFTP, PPPoE Support Layer 2 (802.1Q VLAN, 802.1p) and Layer 3 QoS, DiffServ, MPLS)
Advanced Server Features SIP and DNS server redundancy and fail-over
SecurityDIGEST authentication using MD5/MD5-sess, secure configuration file using AES, SRTP

Comparison Guide

Models2WA22WA1
Network Interfaces2xRJ45 10/100Mbps1xRJ45 10/100Mbps
Telephone HandsetRJ22RJ22
NAT router/DHCP serverYesYes
Full DuplexYes with AECYes with AEC
Universal SwitchingInput: 100-240VAC 50-6-HzInput: 100-240VAC 50-60Hz
 Output: +5VDC, 1.2AOutput: +5VC, 1.2A
Weight0.9kg(2lbs)0.9kg(2lbs)
Temperature32 - 104 F / 0 - 40oC32 - 104 F / 0 - 40oC
Humidity10%-90% (non-condensing)10%-90% (non-condensing)
ComplianceFCC / CE / C-TickFCC / CE / C-Tick
Number of Ethernet Ports21
PoEXX