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Grandstream Networks, Inc. BT200 User Manual Page 8 of 37
Firmware 1.1.1.14 Last Updated: 12/2006
TABLE 3: TECHNICAL SOFTWARE FEATURES
Lines
1 direct number
Protocol Support(1)
IETF SIP (RFC 3261 and companion RFCs)
Display
12-digit caller ID LCD
Feature Keys
8 dedicated keys: Message Button, Hold, Transfer, Conference, Flash,
Speakerphone, Send, Mute/Del, 5 display/menu navigation keys
Ethernet Ports
Dual 100 Mbps Ethernet LAN and PC ports (switched or routed)
Device Management
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
Audio Features
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
Network and Provisioning
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
Advanced Server
Features
Server redundancy – support for fail-over SIP server and DNS server
Security
DIGEST authentication and encryption using MD5 and MD5-sess
SRTP and TLS (pending)