500 SIP users, 60 concurrent calls
Ports:
4 FXS, 4 FXO
Features:
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IP/SIP Failover
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Multiple SIP trunks
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Fax over IP (T.38 and Pass-through)
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Built-in VPN
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TLS / SRTP security
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Call waiting
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Call transfer
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Voicemail
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Call queue
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Ring group
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Paging
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Voicemail to Email
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Event report
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Conference Call