Grandstream HT503 User Manual User Manual
Page 16
FIRMWARE VERSION 1.0.14.1
HT503 USER MANUAL
Page 14 of 64
DHCP Server/Client
Yes
Audio Features
Advanced Digital Signal Processing (DSP)
Dynamic negotiation of codec and voice payload length
Support for G.723, G.729/E, G.711, G.726-40/32/24/16, iLBC, T.38 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 (PLC) & G.168 compliant Line Echo Cancellation
Support volume amplification
Support configurable Call Progress Tones
Call Handling Features Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold, call
forward, do not disturb, 3-way conferencing
Network
and
Provisioning
Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT
support traversal via STUN
Fax over IP
T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax
Pass-through, Fax Data pump V.17, V.19, V.27ter, V.29 for T.38 fax relay
Security
DIGEST authentication and encryption using MD5 and MD5-sess
Physical Design
Stylish and compact design; small universal power supply, ideal for travel