Table of Contents
Advertisement
Appendix C VIP-251T Specifications
Product
Model
Hardware
WAN
LAN
LCD display
Speaker
Protocols and Standard
Standard
Protocols
Voice codec
Voice Standard
Supplementary services
Call history
Network and Configuration
Access Mode
Management
Dimension (W x D x H)
Operating Environment
Power Requirement
EMC/EMI
Desktop SIP IP Phone
VIP-251T
1 x 10/100Mbps RJ-45 port
1 x 10/100Mbps RJ-45 port
4 x 16 characters
Full duplex hands free speaker phone
SIP 2.0 (RFC3261), MD5 for SIP authentication (RFC2069/ RFC
2617), SIP outbound proxy, SIP NAT Traversal Support STUN
(RFC3489)
SIP v1 (RFC2543), v2 (RFC3261), TCP/IP, UDP/RTP/RTCP, HTTP,
ICMP, ARP, RARP, DNS, DHCP, SNTP, PPPoE
G.711: 64k bit/s (PCM)
G.729: 8k bit/s
Voice activity detection (VAD)
Comfort noise generation (CNG)
Acoustic echo canceller (AEC)
G.165: Line echo canceller (LEC)
Jitter Buffer
Caller ID
3-Way conference
Immediate (unconditional) call forwarding
Busy call forwarding
No answer calls forwarding
Call Hold / Waiting / Transfer
Record incoming call
Outgoing call
Missed (not accepted) call history
Static IP, PPPoE, DHCP
Web, LCD menu keypad, Auto-Provision
220 x 187 x 97 mm
0~50 Degree C, 0~90% humidity
5V DC, 1A
CE, FCC Class B
57
Advertisement
Table of Contents
