Grandstream Networks BT200 사용자 설명서

 

Grandstream Networks, Inc. 

Page 8 of 35  

Last Updated:  12/2006

 

 

1 direct number 

IETF SIP (RFC 3261 and companion RFCs) 

12-digit caller ID LCD 

8 dedicated keys:  Message Button, Hold, Transfer, Conference, Flash, 
Speakerphone, Send, Mute/Del, 5 display/menu navigation keys 

Dual 100 Mbps Ethernet LAN and PC ports (switched or routed) 

Web interface or via secure (AES encrypted) central configuration file for 
mass deployment 

NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed 
devices including behind firewall/NAT   

Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, 
MPLS) 

Auto/manual provisioning system 

Keypad & LCD 

Full-duplex hands-free speakerphone  

Advanced Digital Signal Processing (DSP) 

Dynamic negotiation of codec and voice payload length 

Support for G.723,1 (5.3K/6.3K), G.729A/B, G.711 µ/A, G.726, G.722 (wide-
band), GSM and iLBC codecs  

In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO) 

Silence Suppression, VAD (voice activity detection), CNG (comfort noise 
generation), ANG (automatic gain control) 

Adaptive jitter buffer control  

Packet delay & loss concealment  

Call Handling Features   Voice mail indicator with indicator, 3-way conferencing, Caller ID display or 

block, Call waiting, transfer, hold, forward, flash, mute 

Redial, call log, and volume control 

Dial plans, off-hook auto dial, early dial, click-to-dial  

TCP/UDP/IP, RTP/RTCP , HTTP, ARP/RARP, ICMP, DNS, DHCP, NTP, 
TFTP, PPPoE protocols  

Manual or dynamic host configuration protocol (DHCP) network setup 

Support for IEEE 802.1p/Q tagging (VLAN), Layer 3 TOS  

RTP and NAT support traversal via STUN and external media proxy   
Message waiting indication 

Server redundancy – support for fail-over SIP server and DNS server 

DIGEST authentication and encryption using MD5 and MD5-sess 
SRTP and TLS (pending)