8*FXS analog voice gateway
IAD1000-8S is a multi-function gateway that provides analog phone, fax, poss
machine access, and seamless docking of traditional PBX (program-controlled
switch) access to IP system; It solves the daily IP voice services of
enterprises, operators, and residents of the community, with high stability,
good compatibility, and voice/fax processing capabilities.
Detailed parameters

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IPv6, IPv4
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SIP/IMS
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SIP v2.0 (RFC3261) based on UDP/TCP/TLS
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Fax over T.38 and Pass-through
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QoS:L3 DIFFServ, 802, 1P/Q VLAN Tagging
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3-way conference
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Hunting group
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Voice Mail
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Pluse Dialing
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MWI
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5 km long haul
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Music on hold
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Call waiting
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Call Transfer (Blind transfer, Attend transfer)
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Call Forwarding (Unconditional, No reply)
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Speed Dial
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Speed Dial
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Automatic firmware upgrade and configuration via HTTP/HTTPS
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System logs & CDR
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Flexible routing & dial plan
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Backup and restore
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SNMP/TR-069
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TLS/SRTP