Zoom 5821 Features:
and 112 calling
industry-standard Session Initiation Protocol (SIP)
Supports Quality of Service (QOS)
Configurable for SIP-based VoIP services
Supports automatic provisioning by service providers
Zoom 5821 Downloads:
Zoom 5821 Information:
Models 5820/5821 Voice
over IP Telephone Adapters allow standard analog telephones to make and
receive calls over a broadband Internet connection. Both models have two
FXS ports to allow two VoIP channels. Simply plug one or two
conventional or cordless phones into a Model 5820 or 5821 and then plug
the telephone adapter into a broadband- connected router or Internet
A minimum of five
attached phones can be rung simultaneously on each FXS port using the
built-in ring generator.
The Models 5820/5821
support industry-standard Sessions Initiation Protocol (SIPv2) and work
with a wide range of service providers and SIP-based VoIP equipment.
Voice over IP Service
providers can deliver a rich variety of advanced telephone services
through the Models 5820/5821, including CLASS features such as, Call
Waiting, Caller Identification, Call Transfer, Call Hold, Call
Forwarding, Distinctive Ringing, and Voice Message Waiting Indication.
The VoIP terminal
adapter can be configured remotely using a TFTP or HTTP download from
the service provider and updates to the firmware can be automatically
delivered. Local configuration is done with a browser-based graphical
The Model 5820
supports G.711, G.729 and iLBC voice codecs. The Model 5821 supports
G.711 and iLBC.
Zoom 5821 Price: