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5. Specification
Model
SP5004P
SP5008
SP5018
SP5058
Standard
ITU-T H.323 and IETF SIP standards
Interface
4 x FXS
4 x PSTN
1 x WAN
3 x LAN
8 x FXS
1 x WAN
3 x LAN
4 x FXS
4 x FXO
1 x WAN
3 x LAN
8 x FXO
1 x WAN
3 x LAN
DTMF
• SIP: RFC2833, SIP Info, and In-band
• H.323: H.245 Alphanumeric/SignalType, Q.931, RFC2833, and
in-band
Voice
• G.711a/µ-law, G.723A/B, and G.726 and G.729 codecs
• 4/8 x voice channels
• Silence suppression
• VAD, CNG, EC (G.168)
• Adaptive Jitter Buffer
• Gain (Voice Volume) Settings
• Adjustable Call Progress Tone
• Power current drop and polarity reversal supervisory disconnect
(SP5018/SP5058 only)
Telephony
• 4 service registration
• Multiple dial plans & call hunting group
• Call forward / Call hold / Call wait
• Call transfer / 3-way conference (base on server)
• Extensible by external IVR/CDR/Billing servers
FAX T.38
NAT Traversal
STUN, Outbound proxy
QoS
IP ToS/DSCP parameters setting
Networking
Static IP, PPPoE client, DHCP client, DDNS, and VPN capability (PPTP
& L2TP client)
Router Functions • Build-in DHCP Server
• Self-Protection against DoS Attacks
• SNMP, SNTP, HTTP, FTP, NAT, DNS, uPnP, DDNS
• NAT function: Virtual Server, Port mapping, ALG, DMZ, Static routing
table
• Firewall option: Client filtering, URL filtering, MAC control, Drop Port
scans
• VPN Pass-through (PPTP & IPSEC Pass Through)
Management
• Web-based management