User Manual

Appendix C
VIP-281 series Specifications
89
Product 2-Port H.323/SIP VoIP Gateway
Model VIP-281 VIP-281FS
Hardware
WAN 1 x 10/100Mbps RJ-45 port
LAN 4 x 10/100Mbps RJ-45 port
Voice 2 x RJ-11 connection
( 1 x FXS, 1 x FXO)
2 x RJ-11 connection
( 2 x FXS)
Protocols and Standard
Standard H.323 v2/v3/v4 and SIP (RFC 3261) , SDP (RFC 2327), Symmetric RTP,
STUN (RFC3489), ENUM (RFC 2916), RTP Payload for DTMF Digits
(RFC2833), Outbound Proxy Support.
Voice codec G.711(A-law /u-law), G.729 AB, G.723 (6.3 Kbps / 5.3Kbps)
Fax support T.30, T.38
Voice Standard Voice activity detection (VAD)
Comfort noise generation (CNG)
G.165/G.168 Echo cancellation
Dynamic Jitter Buffer
Protocols SIP 2.0 (RFC-3261), H.323, TCP/IP, UDP/RTP/RTCP, HTTP, ICMP, ARP,
NAT, DHCP, PPPoE, DNS
Advanced Function Virtual Server, Smart QoS, IP TOS (IP Precedence) / DiffServ, Build-in NAT
router function.
Network and Configuration
Access Mode Static IP, PPPoE, DHCP
Management Web, Telnet
LED Indications System: 1, PWR
WAN: 1, LNK/ACT
LAN: 4, LNK/ACT
Voice 2, In-Use/Ringing
Dimension (W x D x H) 260 x 135 x 35 mm
Operating Environment 0~40 degree C, 0~95% humidity
Power Requirement 12V DC
EMC/EMI CE, FCC Class B