4
1.1 Key Features
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Dual protocols: SIP & H.323 co-existing
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4/8 x RJ-11 FXS/FXO ports
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Provide 4 RJ-11 PSTN Lifelines (SP5004P)
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G.711A/µ-law, G.723.1, G.726 and G.729 codecs
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Support 4 service registrations
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Support multiple dial plans & call hunting group
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Support Call forward, Call hold and Call waiting
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Support Call transfer and 3-way conference (base on server)
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Transmit T.38 fax
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Power current drop and polarity reversal supervisory disconnect (SP5018/SP5058
only)
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Extensible by external IVR/CDR/Billing servers
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Support outbound proxy and STUN for NAT traversal
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Support advanced IVR for PSTN subscriber to dial in (SP5018 & SP5058 only)
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Support static IP, DHCP, PPPoE
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Provide VPN capability (PPTP / L2TP client) for secured Internet access and voice
communication
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Provide router functions and firewall security
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Support QoS by setting ToS (Type of Service) parameters of VoIP Packets